Strange out of memory issue while loading an image to a Bitmap object

Question

I have a list view with a couple of image buttons on each row  When you click the list row  it launches a new activity  I have had to build my own tabs because of an issue with the camera layout  The activity that gets launched for the result is a map  If I click on my button to launch the image preview  load an image off the SD card  the application returns from the activity back to the listview activity to the result handler to relaunch my new activity which is nothing more than an image widget    The image preview on the list view is being done with the cursor and ListAdapter  This makes it pretty simple  but I am not sure how I can put a resized image  I e  Smaller bit size not pixel as the src for the image button on the fly  So I just resized the image that came off the phone camera   The issue is that I get an out of memory error when it tries to go back and re-launch the 2nd activity    Is there a way I can build the list adapter easily row by row  where I can resize on the fly  bit wise      This would be preferable as I also need to make some changes to the properties of the widgets elements in each row as I am unable to select a row with the touch screen because of the focus issue   I can use roller ball     I know I can do an out of band resize and save of my image  but that is not really what I want to do  but some sample code for that would be nice    As soon as I disabled the image on the list view it worked fine again   FYI  This is how I was doing it   String   from   new String     DBHelper KEY BUSINESSNAME DBHelper KEY ADDRESS DBHelper KEY CITY DBHelper KEY GPSLONG DBHelper KEY GPSLAT DBHelper KEY IMAGEFILENAME         int   to   new int    R id businessname R id address R id city R id gpslong R id gpslat R id imagefilename    notes   new SimpleCursorAdapter this  R layout notes row  c  from  to   setListAdapter notes     Where R id imagefilename is a ButtonImage   Here is my LogCat   01-25 05 05 49 877  ERROR dalvikvm-heap 3896   6291456-byte external allocation too large for this process  01-25 05 05 49 877  ERROR  3896   VM wont let us allocate 6291456 bytes 01-25 05 05 49 877  ERROR AndroidRuntime 3896   Uncaught handler  thread main exiting due to uncaught exception 01-25 05 05 49 917  ERROR AndroidRuntime 3896   java lang OutOfMemoryError  bitmap size exceeds VM budget 01-25 05 05 49 917  ERROR AndroidRuntime 3896       at android graphics BitmapFactory nativeDecodeStream Native Method  01-25 05 05 49 917  ERROR AndroidRuntime 3896       at android graphics BitmapFactory decodeStream BitmapFactory java 304  01-25 05 05 49 917  ERROR AndroidRuntime 3896       at android graphics BitmapFactory decodeFile BitmapFactory java 149  01-25 05 05 49 917  ERROR AndroidRuntime 3896       at android graphics BitmapFactory decodeFile BitmapFactory java 174  01-25 05 05 49 917  ERROR AndroidRuntime 3896       at android graphics drawable Drawable createFromPath Drawable java 729  01-25 05 05 49 917  ERROR AndroidRuntime 3896       at android widget ImageView resolveUri ImageView java 484  01-25 05 05 49 917  ERROR AndroidRuntime 3896       at android widget ImageView setImageURI ImageView java 281  01-25 05 05 49 917  ERROR AndroidRuntime 3896       at android widget SimpleCursorAdapter setViewImage SimpleCursorAdapter java 183  01-25 05 05 49 917  ERROR AndroidRuntime 3896       at android widget SimpleCursorAdapter bindView SimpleCursorAdapter java 129  01-25 05 05 49 917  ERROR AndroidRuntime 3896       at android widget CursorAdapter getView CursorAdapter java 150  01-25 05 05 49 917  ERROR AndroidRuntime 3896       at android widget AbsListView obtainView AbsListView java 1057  01-25 05 05 49 917  ERROR AndroidRuntime 3896       at android widget ListView makeAndAddView ListView java 1616  01-25 05 05 49 917  ERROR AndroidRuntime 3896       at android widget ListView fillSpecific ListView java 1177  01-25 05 05 49 917  ERROR AndroidRuntime 3896       at android widget ListView layoutChildren ListView java 1454  01-25 05 05 49 917  ERROR AndroidRuntime 3896       at android widget AbsListView onLayout AbsListView java 937  01-25 05 05 49 917  ERROR AndroidRuntime 3896       at android view View layout View java 5611  01-25 05 05 49 917  ERROR AndroidRuntime 3896       at android widget LinearLayout setChildFrame LinearLayout java 1119  01-25 05 05 49 917  ERROR AndroidRuntime 3896       at android widget LinearLayout layoutHorizontal LinearLayout java 1108  01-25 05 05 49 917  ERROR AndroidRuntime 3896       at android widget LinearLayout onLayout LinearLayout java 922  01-25 05 05 49 917  ERROR AndroidRuntime 3896       at android view View layout View java 5611  01-25 05 05 49 917  ERROR AndroidRuntime 3896       at android widget FrameLayout onLayout FrameLayout java 294  01-25 05 05 49 917  ERROR AndroidRuntime 3896       at android view View layout View java 5611  01-25 05 05 49 917  ERROR AndroidRuntime 3896       at android widget LinearLayout setChildFrame LinearLayout java 1119  01-25 05 05 49 917  ERROR AndroidRuntime 3896       at android widget LinearLayout layoutVertical LinearLayout java 999  01-25 05 05 49 917  ERROR AndroidRuntime 3896       at android widget LinearLayout onLayout LinearLayout java 920  01-25 05 05 49 917  ERROR AndroidRuntime 3896       at android view View layout View java 5611  01-25 05 05 49 917  ERROR AndroidRuntime 3896       at android widget FrameLayout onLayout FrameLayout java 294  01-25 05 05 49 917  ERROR AndroidRuntime 3896       at android view View layout View java 5611  01-25 05 05 49 917  ERROR AndroidRuntime 3896       at android view ViewRoot performTraversals ViewRoot java 771  01-25 05 05 49 917  ERROR AndroidRuntime 3896       at android view ViewRoot handleMessage ViewRoot java 1103  01-25 05 05 49 917  ERROR AndroidRuntime 3896       at android os Handler dispatchMessage Handler java 88  01-25 05 05 49 917  ERROR AndroidRuntime 3896       at android os Looper loop Looper java 123  01-25 05 05 49 917  ERROR AndroidRuntime 3896       at android app ActivityThread main ActivityThread java 3742  01-25 05 05 49 917  ERROR AndroidRuntime 3896       at java lang reflect Method invokeNative Native Method  01-25 05 05 49 917  ERROR AndroidRuntime 3896       at java lang reflect Method invoke Method java 515  01-25 05 05 49 917  ERROR AndroidRuntime 3896       at com android internal os ZygoteInit MethodAndArgsCaller run ZygoteInit java 739  01-25 05 05 49 917  ERROR AndroidRuntime 3896       at com android internal os ZygoteInit main ZygoteInit java 497  01-25 05 05 49 917  ERROR AndroidRuntime 3896       at dalvik system NativeStart main Native Method  01-25 05 10 01 127  ERROR AndroidRuntime 3943   ERROR  thread attach failed    I also have a new error when displaying an image    01-25 22 13 18 594  DEBUG skia 4204   xxxxxxxxxxx jpeg error 20 Improper call to JPEG library in state  d 01-25 22 13 18 604  INFO System out 4204   resolveUri failed on bad bitmap uri   01-25 22 13 18 694  ERROR dalvikvm-heap 4204   6291456-byte external allocation too large for this process  01-25 22 13 18 694  ERROR  4204   VM won t let us allocate 6291456 bytes 01-25 22 13 18 694  DEBUG skia 4204   xxxxxxxxxxxxxxxxxxxx allocPixelRef failed

User · Answer

To fix the OutOfMemory error  you should do something like this   BitmapFactory Options options   new BitmapFactory Options    options inSampleSize   8  Bitmap preview bitmap   BitmapFactory decodeStream is  null  options     This inSampleSize option reduces memory consumption   Here s a complete method  First it reads image size without decoding the content itself  Then it finds the best inSampleSize value  it should be a power of 2  and finally the image is decoded      Decodes image and scales it to reduce memory consumption private Bitmap decodeFile File f        try              Decode image size         BitmapFactory Options o   new BitmapFactory Options            o inJustDecodeBounds   true          BitmapFactory decodeStream new FileInputStream f   null  o               The new size we want to scale to         final int REQUIRED SIZE 70              Find the correct scale value  It should be the power of 2          int scale   1          while o outWidth   scale   2  gt   REQUIRED SIZE  amp  amp                 o outHeight   scale   2  gt   REQUIRED SIZE                scale    2                        Decode with inSampleSize         BitmapFactory Options o2   new BitmapFactory Options            o2 inSampleSize   scale          return BitmapFactory decodeStream new FileInputStream f   null  o2         catch  FileNotFoundException e         return null

User · Answer

I did the following to take the image and resize it on the fly  Hope this helps  Bitmap bm  bm   Bitmap createScaledBitmap BitmapFactory decodeFile filepath   100  100  true   mPicture   new ImageView context   mPicture setImageBitmap bm

User · Answer

All the solutions here require setting a IMAGE MAX SIZE  This limits devices with more powerful hardware and if the image size is too low it looks ugly on the HD screen   I came out with a solution that works with my Samsung Galaxy S3 and several other devices including less powerful ones  with better image quality when a more powerful device is used   The gist of it is to calculate the maximum memory allocated for the app on a particular device  then set the scale to be lowest possible without exceeding this memory  Here s the code   public static Bitmap decodeFile File f        Bitmap b   null      try                  Decode image size         BitmapFactory Options o   new BitmapFactory Options            o inJustDecodeBounds   true           FileInputStream fis   new FileInputStream f           try                       BitmapFactory decodeStream fis  null  o                     finally                       fis close                          In Samsung Galaxy S3  typically max memory is 64mb            Camera max resolution is 3264 x 2448  times 4 to get Bitmap memory of 30 5mb for one bitmap            If we use scale of 2  resolution will be halved  1632 x 1224 and x 4 to get Bitmap memory of 7 62mb            We try use 25  memory which equals to 16mb maximum for one bitmap         long maxMemory   Runtime getRuntime   maxMemory            int maxMemoryForImage    int   maxMemory   100   25               Refer to            http   developer android com training displaying-bitmaps cache-bitmap html            A full screen GridView filled with images on a device with            800x480 resolution would use around 1 5MB  800 480 4 bytes             When bitmap option s inSampleSize doubled  pixel height and            weight both reduce in half         int scale   1          while   o outWidth   scale     o outHeight   scale    4  gt  maxMemoryForImage          scale    2              Decode with inSampleSize         BitmapFactory Options o2   new BitmapFactory Options            o2 inSampleSize   scale          fis   new FileInputStream f           try                       b   BitmapFactory decodeStream fis  null  o2                     finally                       fis close                        catch  IOException e                  return b      I set the maximum memory used by this bitmap to be 25  of maximum allocated memory  you may need to adjust this to your needs and make sure this bitmap is cleaned up and don t stay in memory when you ve finished using it  Typically I use this code to perform image rotation  source and destination bitmap  so my app needs to load 2 bitmaps in memory at the same time  and 25  gives me a good buffer without running out of memory when performing image rotation   Hope this helps someone out there

User · Answer

I had this same issue and solved it by avoiding the BitmapFactory decodeStream or decodeFile functions and instead used BitmapFactory decodeFileDescriptor  decodeFileDescriptor looks like it calls different native methods than the decodeStream decodeFile   Anyways  what worked was this  note that I added some options as some had above  but that s not what made the difference  What is critical is the call to BitmapFactory decodeFileDescriptor instead of decodeStream or decodeFile    private void showImage String path           Log i  showImage   loading   path       BitmapFactory Options bfOptions new BitmapFactory Options        bfOptions inDither false                        Disable Dithering mode     bfOptions inPurgeable true                      Tell to gc that whether it needs free memory  the Bitmap can be cleared     bfOptions inInputShareable true                 Which kind of reference will be used to recover the Bitmap data after being clear  when it will be used in the future     bfOptions inTempStorage new byte 32   1024         File file new File path       FileInputStream fs null      try           fs   new FileInputStream file         catch  FileNotFoundException e              TODO do something intelligent         e printStackTrace               try           if fs  null  bm BitmapFactory decodeFileDescriptor fs getFD    null  bfOptions         catch  IOException e              TODO do something intelligent         e printStackTrace          finally           if fs  null                try                   fs close                  catch  IOException e                       TODO Auto-generated catch block                 e printStackTrace                                        bm BitmapFactory decodeFile path  bfOptions   This one causes error  java lang OutOfMemoryError  bitmap size exceeds VM budget      im setImageBitmap bm         bm recycle        bm null                              I think there is a problem with the native function used in decodeStream decodeFile  I have confirmed that a different native method is called when using decodeFileDescriptor   Also what I ve read is  that Images  Bitmaps  are not allocated in a standard Java way but via native calls  the allocations are done outside of the virtual heap  but are counted against it

User · Answer

use this concept this will help you  After that set the imagebitmap on image view  public static Bitmap convertBitmap String path               Bitmap bitmap null          BitmapFactory Options bfOptions new BitmapFactory Options            bfOptions inDither false                        Disable Dithering mode         bfOptions inPurgeable true                      Tell to gc that whether it needs free memory  the Bitmap can be cleared         bfOptions inInputShareable true                 Which kind of reference will be used to recover the Bitmap data after being clear  when it will be used in the future         bfOptions inTempStorage new byte 32   1024              File file new File path           FileInputStream fs null          try               fs   new FileInputStream file             catch  FileNotFoundException e                e printStackTrace                       try               if fs  null                                bitmap BitmapFactory decodeFileDescriptor fs getFD    null  bfOptions                               catch  IOException e                 e printStackTrace              finally               if fs  null                    try                       fs close                      catch  IOException e                         e printStackTrace                                                       return bitmap          If you want to make a small image from large image with height and width like 60 and 60 and scroll the listview fast then use this concept  public static Bitmap decodeSampledBitmapFromPath String path  int reqWidth              int reqHeight             final BitmapFactory Options options   new BitmapFactory Options            options inJustDecodeBounds   true          BitmapFactory decodeFile path  options            options inSampleSize   calculateInSampleSize options  reqWidth                  reqHeight               Decode bitmap with inSampleSize set         options inJustDecodeBounds   false          Bitmap bmp   BitmapFactory decodeFile path  options           return bmp                 public static int calculateInSampleSize BitmapFactory Options options              int reqWidth  int reqHeight             final int height   options outHeight          final int width   options outWidth          int inSampleSize   1           if  height  gt  reqHeight    width  gt  reqWidth                if  width  gt  height                    inSampleSize   Math round  float  height    float  reqHeight                 else                   inSampleSize   Math round  float  width    float  reqWidth                                      return inSampleSize              I hope it will help you much   You can take help from developer site Here

User · Answer

I did the following to take the image and resize it on the fly  Hope this helps  Bitmap bm  bm   Bitmap createScaledBitmap BitmapFactory decodeFile filepath   100  100  true   mPicture   new ImageView context   mPicture setImageBitmap bm

User · Answer

It s a known bug  it s not because of large files  Since Android Caches the Drawables  it s going out of memory after using few images  But I ve found an alternate way for it  by skipping the android default cache system   Solution  Move the images to  assets  folder and use the following function to get BitmapDrawable   public static Drawable getAssetImage Context context  String filename  throws IOException       AssetManager assets   context getResources   getAssets        InputStream buffer   new BufferedInputStream  assets open  drawable     filename     png          Bitmap bitmap   BitmapFactory decodeStream buffer       return new BitmapDrawable context getResources    bitmap

User · Answer

BitmapFactory Options options   new Options    options inSampleSize   32    img   BitmapFactory decodeFile imageids position   options    Bitmap theImage   BitmapFactory decodeStream imageStream null  options   Bitmap img theImage copy Bitmap Config RGB 565 true   theImage recycle    theImage   null  System gc      ivlogdp setImageBitmap img   Runtime getRuntime   gc

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BitmapFactory Options options   new Options    options inSampleSize   32    img   BitmapFactory decodeFile imageids position   options    Bitmap theImage   BitmapFactory decodeStream imageStream null  options   Bitmap img theImage copy Bitmap Config RGB 565 true   theImage recycle    theImage   null  System gc      ivlogdp setImageBitmap img   Runtime getRuntime   gc

User · Answer

I tried Thomas Vervest s approach  but it returns a scale of 1 for image size 2592x1944 when IMAGE MAX SIZE is 2048   This version worked for me based on all the other comments provided by others   private Bitmap decodeFile  File f        Bitmap b   null      try              Decode image size         BitmapFactory Options o   new BitmapFactory Options             o inJustDecodeBounds   true           FileInputStream fis   new FileInputStream  f           try               BitmapFactory decodeStream  fis  null  o             finally               fis close                        int scale   1          for  int size   Math max  o outHeight  o outWidth                 size gt  gt  scale-1    gt  IMAGE MAX SIZE    scale               Decode with inSampleSize         BitmapFactory Options o2   new BitmapFactory Options             o2 inSampleSize   scale          fis   new FileInputStream  f           try               b   BitmapFactory decodeStream  fis  null  o2             finally               fis close                     catch  IOException e              return b

User · Answer

After looking through all the answers  I was surprised to see that no one mentioned the Glide API for handling images  Great library  and abstracts out all the complexity of bitmap management  You can load and resize images quickly with this library and a single line of code        Glide with this  load yourImageResource  into imageview     You can get the repository here  https   github com bumptech glide

User · Answer

I tried Thomas Vervest s approach  but it returns a scale of 1 for image size 2592x1944 when IMAGE MAX SIZE is 2048   This version worked for me based on all the other comments provided by others   private Bitmap decodeFile  File f        Bitmap b   null      try              Decode image size         BitmapFactory Options o   new BitmapFactory Options             o inJustDecodeBounds   true           FileInputStream fis   new FileInputStream  f           try               BitmapFactory decodeStream  fis  null  o             finally               fis close                        int scale   1          for  int size   Math max  o outHeight  o outWidth                 size gt  gt  scale-1    gt  IMAGE MAX SIZE    scale               Decode with inSampleSize         BitmapFactory Options o2   new BitmapFactory Options             o2 inSampleSize   scale          fis   new FileInputStream  f           try               b   BitmapFactory decodeStream  fis  null  o2             finally               fis close                     catch  IOException e              return b

User · Answer

It seems the images you have used is very large in size so some older devices crashes occurs due to heap memory full In older devices honey comb or ICS or any low end model devices  try to use android largeHeap  true  in the manifest file under application tag or reduce the size of the bitmap by using below code   Bitmap bMap  BitmapFactory Options options   new BitmapFactory Options     options InSampleSize   8  bMap  BitmapFactory DecodeFile imgFile AbsolutePath  options     you can also give 4 or 12 or 16 to reduce the bitmap size

User · Answer

To fix OutOfMemory you should do something like that please try this code  public Bitmap loadBitmap String URL  BitmapFactory Options options                    Bitmap bitmap   null                  InputStream in   null                  options inSampleSize 4                  try                       in   OpenHttpConnection URL                       Log e  In     gt    in                          bitmap   BitmapFactory decodeStream in  null  options                       Log e  URL     gt    bitmap                           in close                      catch  IOException e1                                      return bitmap                  and  try                       BitmapFactory Options bmOptions                      bmOptions   new BitmapFactory Options                        bmOptions inSampleSize   1                      if studentImage    null                           galleryThumbnail  loadBitmap IMAGE URL studentImage  bmOptions                                                  galleryThumbnail getResizedBitmap galleryThumbnail  imgEditStudentPhoto getHeight    imgEditStudentPhoto getWidth                         Log e  Image Url   gt   IMAGE URL studentImage                         catch  Exception e                           TODO Auto-generated catch block                     e printStackTrace

User · Answer

unfortunately if None of the Above works  then Add this to your Manifest file  Inside application tag    lt application          android largeHeap  true

User · Answer

It seems the images you have used is very large in size so some older devices crashes occurs due to heap memory full In older devices honey comb or ICS or any low end model devices  try to use android largeHeap  true  in the manifest file under application tag or reduce the size of the bitmap by using below code   Bitmap bMap  BitmapFactory Options options   new BitmapFactory Options     options InSampleSize   8  bMap  BitmapFactory DecodeFile imgFile AbsolutePath  options     you can also give 4 or 12 or 16 to reduce the bitmap size

User · Answer

None of the answers above worked for me  but I did come up with a horribly ugly workaround that solved the problem  I added a very small  1x1 pixel image to my project as a resource  and loaded it into my ImageView before calling into garbage collection  I think it might be that the ImageView was not releasing the Bitmap  so GC never picked it up  It s ugly  but it seems to be working for now   if  bitmap    null      bitmap recycle      bitmap   null    if  imageView    null      imageView setImageResource R drawable tiny      This is my 1x1 png    System gc     imageView setImageBitmap          Do whatever you need to do to load the image you want

User · Answer

My 2 cents  i solved my OOM errors with bitmaps by   a  scaling my images by a factor of 2  b  using Picasso library in my custom Adapter for a ListView  with a one-call in getView like this  Picasso with context  load R id myImage  into R id myImageView

User · Answer

I have a much more effective solution which does not need scaling of any sort  Simply decode your bitmap only once and then cache it in a map against its name  Then simply retrieve the bitmap against the name and set it in the ImageView  There is nothing more that needs to be done   This will work because the actual binary data of the decoded bitmap is not stored within the dalvik VM heap  It is stored externally  So every time you decode a bitmap  it allocates memory outside of VM heap which is never reclaimed by GC  To help you better appreciate this  imagine you have kept ur image in the drawable folder  You just get the image by doing a getResources   getDrwable R drawable    This will NOT decode your image everytime but re-use an already decoded instance everytime you call it  So in essence it is cached   Now since your image is in a file somewhere  or may even be coming from an external server   it is YOUR responsibility to cache the decoded bitmap instance to be reused any where it is needed   Hope this helps

User · Answer

I have seen a lot of questions about OOM exceptions and caching lately  The developer guide has a really good article on this  but some tends to fail on implementing it in a suitable way    Because of this I wrote an example application that demonstrates caching in an Android environment  This implementation has not yet gotten an OOM   Look at the end of this answer for a link to the source code   Requirements    Android API 2 1 or higher  I simply could not manage to get the available memory for an application in API 1 6 - that is the only piece of code that doesn t work in API 1 6  Android support package     Features    Retains the cache if there is an orientation change  using a singleton Use one eighth of the assigned application memory to the cache  modify if you want   Large bitmaps gets scaled  you can define the maximum pixels that you want to allow  Controls that there is an internet connection available before downloading the bitmaps Makes sure that you are only instantiating one task per row If you are flinging the ListView away  it simply won t download the bitmaps between   This does not include    Disk caching  This should be easy to implement anyway - just point to a different task that grabs the bitmaps from the disk   Sample code   The images that are being downloaded are images  75x75  from Flickr  However  put whatever image urls you want to be processed  and the application will scale it down if it exceeds the maximum  In this application the urls are simply in a String array   The LruCache has a good way to deal with bitmaps  However  in this application I put an instance of an LruCache inside another cache class that I created in order to get the application more feasible   Cache java s critical stuff  the loadBitmap   method is the most important    public Cache int size  int maxWidth  int maxHeight           Into the constructor you add the maximum pixels        that you want to allow in order to not scale images      mMaxWidth   maxWidth      mMaxHeight   maxHeight       mBitmapCache   new LruCache lt String  Bitmap gt  size            protected int sizeOf String key  Bitmap b                   Assuming that one pixel contains four bytes              return b getHeight     b getWidth     4                        mCurrentTasks   new ArrayList lt String gt                   Gets a bitmap from cache      If it is not in cache  this method will         1  check if the bitmap url is currently being processed in the    BitmapLoaderTask and cancel if it is already in a task  a control to see    if it s inside the currentTasks list          2  check if an internet connection is available and continue if so         3  download the bitmap  scale the bitmap if necessary and put it into    the memory cache         4  Remove the bitmap url from the currentTasks list         5  Notify the ListAdapter          param mainActivity - Reference to activity object  in order to    call notifyDataSetChanged   on the ListAdapter      param imageKey - The bitmap url  will be the key       param imageView - The ImageView that should get an    available bitmap or a placeholder image      param isScrolling - If set to true  we skip executing more tasks since    the user probably has flinged away the view      public void loadBitmap MainActivity mainActivity           String imageKey  ImageView imageView          boolean isScrolling        final Bitmap bitmap   getBitmapFromCache imageKey         if  bitmap    null            imageView setImageBitmap bitmap         else           imageView setImageResource R drawable ic launcher           if   isScrolling  amp  amp   mCurrentTasks contains imageKey   amp  amp                   mainActivity internetIsAvailable                  BitmapLoaderTask task   new BitmapLoaderTask imageKey                      mainActivity getAdapter                 task execute                         You shouldn t need to edit anything in the Cache java file unless you want to implement disk caching   MainActivity java s critical stuff   public void onScrollStateChanged AbsListView view  int scrollState        if  view getId      android R id list               Set scrolling to true only if the user has flinged the                   ListView away  hence we skip downloading a series            of unnecessary bitmaps that the user probably            just want to skip anyways  If we scroll slowly it            will still download bitmaps - that means            that the application won t wait for the user            to lift its finger off the screen in order to            download          if  scrollState    SCROLL STATE FLING                mIsScrolling   true            else               mIsScrolling   false              mListAdapter notifyDataSetChanged                           Inside ListAdapter     Override public View getView final int position  View convertView  ViewGroup parent                   View row   convertView      final ViewHolder holder       if  row    null            LayoutInflater inflater   getLayoutInflater            row   inflater inflate R layout main listview row  parent  false             holder   new ViewHolder row           row setTag holder         else           holder    ViewHolder  row getTag                  final Row rowObject   getItem position           Look at the loadBitmap   method description        holder mTextView setText rowObject mText             mCache loadBitmap MainActivity this              rowObject mBitmapUrl  holder mImageView              mIsScrolling          return row      getView   gets called very often  It s normally not a good idea to download images there if we haven t implemented a check that ensure us that we won t start an infinite amount of threads per row  Cache java checks whether the rowObject mBitmapUrl already is in a task and if it is  it won t start another  Therefore  we are most likely not exceeding the work queue restriction from the AsyncTask pool   Download   You can download the source code from https   www dropbox com s pvr9zyl811tfeem ListViewImageCache zip     Last words   I have tested this for a few weeks now  I haven t gotten a single OOM exception yet  I have tested this on the emulator  on my Nexus One and on my Nexus S  I have tested image urls that contain images that were in HD quality  The only bottleneck is that it takes more time to download   There is only one possible scenario where I can imagine that the OOM will appear  and that is if we download many  really big images  and before they get scaled and put into cache  will simultaneously take up more memory and cause an OOM  But that isn t even an ideal situation anyway and it most likely won t be possible to solve in a more feasible way   Report errors in the comments   -

User · Answer

This code will help to load large bitmap from drawable  public class BitmapUtilsTask extends AsyncTask lt Object  Void  Bitmap gt         Context context       public BitmapUtilsTask Context context            this context   context                        Loads a bitmap from the specified url                  param url The location of the bitmap asset         return The bitmap  or null if it could not be loaded         throws IOException         throws MalformedURLException             public Bitmap getBitmap   throws MalformedURLException  IOException                      Get the source image s dimensions         int desiredWidth   1000          BitmapFactory Options options   new BitmapFactory Options            options inJustDecodeBounds   true           BitmapFactory decodeResource context getResources    R drawable green background   options            int srcWidth   options outWidth          int srcHeight   options outHeight              Only scale if the source is big enough  This code is just trying            to fit a image into a certain width          if  desiredWidth  gt  srcWidth              desiredWidth   srcWidth              Calculate the correct inSampleSize scale value  This helps reduce            memory use  It should be a power of 2         int inSampleSize   1          while  srcWidth   2  gt  desiredWidth                srcWidth    2              srcHeight    2              inSampleSize    2                       Decode with inSampleSize         options inJustDecodeBounds   false          options inDither   false          options inSampleSize   inSampleSize          options inScaled   false          options inPreferredConfig   Bitmap Config ARGB 8888          options inPurgeable   true          Bitmap sampledSrcBitmap           sampledSrcBitmap    BitmapFactory decodeResource context getResources    R drawable green background   options            return sampledSrcBitmap                        The system calls this to perform work in a worker thread and delivers        it the parameters given to AsyncTask execute                Override     protected Bitmap doInBackground Object    item            try              return getBitmap              catch  MalformedURLException e                e printStackTrace              catch  IOException e                e printStackTrace                      return null

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Great answers here  but I wanted a fully usable class to address this problem   so I did one   Here is my BitmapHelper class that is OutOfMemoryError proof  -   import java io File  import java io FileInputStream   import android graphics Bitmap  import android graphics Bitmap Config  import android graphics BitmapFactory  import android graphics Canvas  import android graphics Matrix  import android graphics drawable BitmapDrawable  import android graphics drawable Drawable   public class BitmapHelper          decodes image and scales it to reduce memory consumption     public static Bitmap decodeFile File bitmapFile  int requiredWidth  int requiredHeight  boolean quickAndDirty                try                         Decode image size             BitmapFactory Options bitmapSizeOptions   new BitmapFactory Options                bitmapSizeOptions inJustDecodeBounds   true              BitmapFactory decodeStream new FileInputStream bitmapFile   null  bitmapSizeOptions                   load image using inSampleSize adapted to required image size             BitmapFactory Options bitmapDecodeOptions   new BitmapFactory Options                bitmapDecodeOptions inTempStorage   new byte 16   1024               bitmapDecodeOptions inSampleSize   computeInSampleSize bitmapSizeOptions  requiredWidth  requiredHeight  false               bitmapDecodeOptions inPurgeable   true              bitmapDecodeOptions inDither    quickAndDirty              bitmapDecodeOptions inPreferredConfig   quickAndDirty   Bitmap Config RGB 565   Bitmap Config ARGB 8888               Bitmap decodedBitmap   BitmapFactory decodeStream new FileInputStream bitmapFile   null  bitmapDecodeOptions                   scale bitmap to mathc required size  and keep aspect ratio               float srcWidth    float  bitmapDecodeOptions outWidth              float srcHeight    float  bitmapDecodeOptions outHeight               float dstWidth    float  requiredWidth              float dstHeight    float  requiredHeight               float srcAspectRatio   srcWidth   srcHeight              float dstAspectRatio   dstWidth   dstHeight                  recycleDecodedBitmap is used to know if we must recycle intermediary  decodedBitmap                  DO NOT recycle it right away  wait for end of bitmap manipulation process to avoid                java lang RuntimeException  Canvas  trying to use a recycled bitmap android graphics Bitmap 416ee7d8                I do not excatly understand why  but this way it s OK              boolean recycleDecodedBitmap   false               Bitmap scaledBitmap   decodedBitmap              if  srcAspectRatio  lt  dstAspectRatio                                scaledBitmap   getScaledBitmap decodedBitmap   int  dstWidth   int   srcHeight    dstWidth   srcWidth                        will recycle recycleDecodedBitmap                 recycleDecodedBitmap   true                            else if  srcAspectRatio  gt  dstAspectRatio                                scaledBitmap   getScaledBitmap decodedBitmap   int   srcWidth    dstHeight   srcHeight     int  dstHeight                   recycleDecodedBitmap   true                                crop image to match required image size              int scaledBitmapWidth   scaledBitmap getWidth                int scaledBitmapHeight   scaledBitmap getHeight                 Bitmap croppedBitmap   scaledBitmap               if  scaledBitmapWidth  gt  requiredWidth                                int xOffset    scaledBitmapWidth - requiredWidth    2                  croppedBitmap   Bitmap createBitmap scaledBitmap  xOffset  0  requiredWidth  requiredHeight                   scaledBitmap recycle                              else if  scaledBitmapHeight  gt  requiredHeight                                int yOffset    scaledBitmapHeight - requiredHeight    2                  croppedBitmap   Bitmap createBitmap scaledBitmap  0  yOffset  requiredWidth  requiredHeight                   scaledBitmap recycle                               if  recycleDecodedBitmap                                decodedBitmap recycle                              decodedBitmap   null               scaledBitmap   null              return croppedBitmap                    catch  Exception ex                        ex printStackTrace                      return null                        compute powerOf2 or exact scale to be used as   link BitmapFactory Options inSampleSize  value  for subSampling                  param requiredWidth         param requiredHeight         param powerOf2                   weither we want a power of 2 sclae or not         return             public static int computeInSampleSize BitmapFactory Options options  int dstWidth  int dstHeight  boolean powerOf2                int inSampleSize   1              Raw height and width of image         final int srcHeight   options outHeight          final int srcWidth   options outWidth           if  powerOf2                          Find the correct scale value  It should be the power of 2               int tmpWidth   srcWidth  tmpHeight   srcHeight              while  true                                if  tmpWidth   2  lt  dstWidth    tmpHeight   2  lt  dstHeight                      break                  tmpWidth    2                  tmpHeight    2                  inSampleSize    2                                  else                          Calculate ratios of height and width to requested height and width             final int heightRatio   Math round  float  srcHeight    float  dstHeight               final int widthRatio   Math round  float  srcWidth    float  dstWidth                   Choose the smallest ratio as inSampleSize value  this will guarantee                a final image with both dimensions larger than or equal to the                requested height and width              inSampleSize   heightRatio  lt  widthRatio   heightRatio   widthRatio                     return inSampleSize             public static Bitmap drawableToBitmap Drawable drawable                if  drawable instanceof BitmapDrawable                        return   BitmapDrawable  drawable  getBitmap                       Bitmap bitmap   Bitmap createBitmap drawable getIntrinsicWidth    drawable getIntrinsicHeight    Config ARGB 8888           Canvas canvas   new Canvas bitmap           drawable setBounds 0  0  canvas getWidth    canvas getHeight             drawable draw canvas            return bitmap             public static Bitmap getScaledBitmap Bitmap bitmap  int newWidth  int newHeight                int width   bitmap getWidth            int height   bitmap getHeight            float scaleWidth     float  newWidth    width          float scaleHeight     float  newHeight    height              CREATE A MATRIX FOR THE MANIPULATION         Matrix matrix   new Matrix               RESIZE THE BIT MAP         matrix postScale scaleWidth  scaleHeight               RECREATE THE NEW BITMAP         Bitmap resizedBitmap   Bitmap createBitmap bitmap  0  0  width  height  matrix  false           return resizedBitmap

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I needed to load a large size image into Bitmap and I used Glide to solve this issue  First check the image size with BitmapFactory Options using inJustDecodeBounds set to true  then use Glide to get Bitmap object  I used the profiler to check memory usage but I did not see any memory spike like I did when I was using BitmapFactory decodeFile    I am writing in c  as I use Xamarin  so need a little tweak to use in Java  Glide library documentation private Bitmap DecodeFile File file               Decode image size         BitmapFactory Options options   new BitmapFactory Options                        setting inJustDecodeBounds to true won t load the file into memory              but gives you the actual file size          options InJustDecodeBounds   true          BitmapFactory decodeStream new FileInputStream file   null  options           int actualWidth   options OutWidth          int actualHeight   options OutHeight                           var ratio    double actualHeight   actualWidth              Default to 800 x 600  changed the size whatever you need          var desiredWidth   800          var desiredHeight   600           if actualHeight  gt  actualWidth                        var ratio    double actualWidth   actualHeight              var futureTarget   Glide With Application Context                   AsBitmap                    Load file                   SetDiskCacheStrategy DiskCacheStrategy None                   SkipMemoryCache true                   Submit  int  desiredWidth   ratio   desiredWidth               bitmap   futureTarget Get   as Bitmap                    else                       var ratio    double actualHeight   actualWidth              var futureTarget   Glide With Application Context                   AsBitmap                    Load file                   SetDiskCacheStrategy DiskCacheStrategy None                   SkipMemoryCache true                   Submit desiredWidth   int  desiredWidth   ratio                bitmap   futureTarget Get   as Bitmap           return bitmap

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Generally android device heap size is only 16MB  varies from device OS see post Heap Sizes   if you are loading the images and it crosses the size of 16MB   it will throw out of memory exception  instead of using the Bitmap for   loading images from SD card or from resources or even from network try to using getImageUri   loading bitmap require more memory   or you can set bitmap to null if your work done with that bitmap

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After setting an bitmap to imageview  recycle it like this   bitmap recycle    bitmap null

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I come from iOS experience and I was frustrated to discover an issue with something so basic as loading and showing an image  After all  everyone that is having this issue is trying to display reasonably sized images  Anyway  here are the two changes that fixed my problem  and made my app very responsive    1  Every time you do BitmapFactory decodeXYZ    make sure to pass in a BitmapFactory Options with inPurgeable set to true  and preferably with inInputShareable also set to true    2  NEVER use Bitmap createBitmap width  height  Config ARGB 8888   I mean NEVER  I ve never had that thing not raise memory error after few passes  No amount of recycle    System gc    whatever helped  It always raised exception  The one other way that actually works is to have a dummy image in your drawables  or another Bitmap that you decoded using step 1 above   rescale that to whatever you want  then manipulate the resulting Bitmap  such as passing it on to a Canvas for more fun   So  what you should use instead is  Bitmap createScaledBitmap srcBitmap  width  height  false   If for whatever reason you MUST use the brute force create method  then at least pass Config ARGB 4444    This is almost guaranteed to save you hours if not days  All that talk about scaling the image  etc  does not really work  unless you consider getting wrong size or degraded image a solution

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I ve spent the entire day testing these solutions and the only thing that worked for me is the above approaches for getting the image and manually calling the GC  which I know is not supposed to be necessary  but it is the only thing that worked when I put my app under heavy load testing switching between activities   My app has a list of thumbnail images in a listview in  lets say activity A  and when you click on one of those images it takes you to another activity  lets say activity B  that shows a main image for that item   When I would switch back and forth between the two activities  I would eventually get the OOM error and the app would force close     When I would get half way down the listview it would crash   Now when I implement the following in activity B  I can go through the entire listview with no issue and keep going and going and going   and its plenty fast    Override public void onDestroy            Cleanup        super onDestroy       private void Cleanup             bitmap recycle        System gc        Runtime getRuntime   gc

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This worked for me   public Bitmap readAssetsBitmap String filename  throws IOException       try           BitmapFactory Options options   new BitmapFactory Options             options inPurgeable   true          Bitmap bitmap   BitmapFactory decodeStream assets open filename   null  options           if bitmap    null                throw new IOException  File cannot be opened  It s value is null              else               return bitmap                  catch  IOException e            throw new IOException  File cannot be opened      e getMessage

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Generally android device heap size is only 16MB  varies from device OS see post Heap Sizes   if you are loading the images and it crosses the size of 16MB   it will throw out of memory exception  instead of using the Bitmap for   loading images from SD card or from resources or even from network try to using getImageUri   loading bitmap require more memory   or you can set bitmap to null if your work done with that bitmap

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In one of my application i need to take picture either from Camera Gallery  If user click image from Camera may be 2MP  5MP or 8MP   image size varies from kBs to MBs  If image size is less or up to 1-2MB  above code working fine but if i have image of size above 4MB or 5MB then OOM comes in frame     then i have worked to solve this issue  amp  finally i ve made the below improvement to Fedor s All Credit to Fedor for making such a nice solution  code     private Bitmap decodeFile String fPath           Decode image size     BitmapFactory Options opts   new BitmapFactory Options                  If set to true  the decoder will return null  no bitmap   but the        out    fields will still be set  allowing the caller to query the        bitmap without having to allocate the memory for its pixels              opts inJustDecodeBounds   true      opts inDither   false     Disable Dithering mode     opts inPurgeable   true     Tell to gc that whether it needs free                                    memory  the Bitmap can be cleared     opts inInputShareable   true     Which kind of reference will be used to                                        recover the Bitmap data after being                                        clear  when it will be used in the                                        future      BitmapFactory decodeFile fPath  opts           The new size we want to scale to     final int REQUIRED SIZE   70          Find the correct scale value       int scale   1       if  opts outHeight  gt  REQUIRED SIZE    opts outWidth  gt  REQUIRED SIZE                Calculate ratios of height and width to requested height and width         final int heightRatio   Math round  float  opts outHeight                    float  REQUIRED SIZE           final int widthRatio   Math round  float  opts outWidth                    float  REQUIRED SIZE               Choose the smallest ratio as inSampleSize value  this will guarantee            a final image with both dimensions larger than or equal to the            requested height and width          scale   heightRatio  lt  widthRatio   heightRatio   widthRatio                  Decode bitmap with inSampleSize set     opts inJustDecodeBounds   false       opts inSampleSize   scale       Bitmap bm   BitmapFactory decodeFile fPath  opts  copy              Bitmap Config RGB 565  false        return bm       I hope this will help the buddies facing the same problem   for more please refer this

User · Answer

Such OutofMemoryException cannot be totally resolved by calling the System gc   and so on    By referring to the Activity Life Cycle  The Activity States are determined by the OS itself subject to the memory usage for each process and the priority of each process   You may consider the size and the resolution for each of the bitmap pictures used  I recommend to reduce the size  resample to lower resolution   refer to the design of galleries  one small picture PNG   and one original picture

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I think best way to avoid the OutOfMemoryError is to face it and understand it   I made an app to intentionally cause OutOfMemoryError  and monitor memory usage   After I ve done a lot of experiments with this App  I ve got the following conclusions   I m gonna talk about SDK versions before Honey Comb first    Bitmap is stored in native heap  but it will get garbage collected automatically  calling recycle   is needless  If  VM heap size     allocated native heap memory      VM heap size limit for the device   and you are trying to create bitmap  OOM will be thrown   NOTICE  VM HEAP SIZE is counted rather than VM ALLOCATED MEMORY  VM Heap size will never shrink after grown  even if the allocated VM memory is shrinked   So you have to keep the peak VM memory as low as possible to keep VM Heap Size from growing too big to save available memory for Bitmaps  Manually call System gc   is meaningless  the system will call it first before trying to grow the heap size  Native Heap Size will never shrink too  but it s not counted for OOM  so no need to worry about it    Then  let s talk about SDK Starts from Honey Comb    Bitmap is stored in VM heap  Native memory is not counted for OOM  The condition for OOM is much simpler   VM heap size      VM heap size limit for the device    So you have more available memory to create bitmap with the same heap size limit   OOM is less likely to be thrown    Here is some of my observations about Garbage Collection and Memory Leak   You can see it yourself in the App  If an Activity executed an AsyncTask that was still running after the Activity was destroyed  the Activity will not get garbage collected until the AsyncTask finish   This is because AsyncTask is an instance of an anonymous inner class  it holds a reference of the Activity   Calling AsyncTask cancel true  will not stop the execution if the task is blocked in an IO operation in background thread   Callbacks are anonymous inner classes too  so if a static instance in your project holds them and do not release them  memory would be leaked   If you scheduled a repeating or delayed task  for example a Timer  and you do not call cancel   and purge   in onPause    memory would be leaked

User · Answer

I think best way to avoid the OutOfMemoryError is to face it and understand it   I made an app to intentionally cause OutOfMemoryError  and monitor memory usage   After I ve done a lot of experiments with this App  I ve got the following conclusions   I m gonna talk about SDK versions before Honey Comb first    Bitmap is stored in native heap  but it will get garbage collected automatically  calling recycle   is needless  If  VM heap size     allocated native heap memory      VM heap size limit for the device   and you are trying to create bitmap  OOM will be thrown   NOTICE  VM HEAP SIZE is counted rather than VM ALLOCATED MEMORY  VM Heap size will never shrink after grown  even if the allocated VM memory is shrinked   So you have to keep the peak VM memory as low as possible to keep VM Heap Size from growing too big to save available memory for Bitmaps  Manually call System gc   is meaningless  the system will call it first before trying to grow the heap size  Native Heap Size will never shrink too  but it s not counted for OOM  so no need to worry about it    Then  let s talk about SDK Starts from Honey Comb    Bitmap is stored in VM heap  Native memory is not counted for OOM  The condition for OOM is much simpler   VM heap size      VM heap size limit for the device    So you have more available memory to create bitmap with the same heap size limit   OOM is less likely to be thrown    Here is some of my observations about Garbage Collection and Memory Leak   You can see it yourself in the App  If an Activity executed an AsyncTask that was still running after the Activity was destroyed  the Activity will not get garbage collected until the AsyncTask finish   This is because AsyncTask is an instance of an anonymous inner class  it holds a reference of the Activity   Calling AsyncTask cancel true  will not stop the execution if the task is blocked in an IO operation in background thread   Callbacks are anonymous inner classes too  so if a static instance in your project holds them and do not release them  memory would be leaked   If you scheduled a repeating or delayed task  for example a Timer  and you do not call cancel   and purge   in onPause    memory would be leaked

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Great answers here  but I wanted a fully usable class to address this problem   so I did one   Here is my BitmapHelper class that is OutOfMemoryError proof  -   import java io File  import java io FileInputStream   import android graphics Bitmap  import android graphics Bitmap Config  import android graphics BitmapFactory  import android graphics Canvas  import android graphics Matrix  import android graphics drawable BitmapDrawable  import android graphics drawable Drawable   public class BitmapHelper          decodes image and scales it to reduce memory consumption     public static Bitmap decodeFile File bitmapFile  int requiredWidth  int requiredHeight  boolean quickAndDirty                try                         Decode image size             BitmapFactory Options bitmapSizeOptions   new BitmapFactory Options                bitmapSizeOptions inJustDecodeBounds   true              BitmapFactory decodeStream new FileInputStream bitmapFile   null  bitmapSizeOptions                   load image using inSampleSize adapted to required image size             BitmapFactory Options bitmapDecodeOptions   new BitmapFactory Options                bitmapDecodeOptions inTempStorage   new byte 16   1024               bitmapDecodeOptions inSampleSize   computeInSampleSize bitmapSizeOptions  requiredWidth  requiredHeight  false               bitmapDecodeOptions inPurgeable   true              bitmapDecodeOptions inDither    quickAndDirty              bitmapDecodeOptions inPreferredConfig   quickAndDirty   Bitmap Config RGB 565   Bitmap Config ARGB 8888               Bitmap decodedBitmap   BitmapFactory decodeStream new FileInputStream bitmapFile   null  bitmapDecodeOptions                   scale bitmap to mathc required size  and keep aspect ratio               float srcWidth    float  bitmapDecodeOptions outWidth              float srcHeight    float  bitmapDecodeOptions outHeight               float dstWidth    float  requiredWidth              float dstHeight    float  requiredHeight               float srcAspectRatio   srcWidth   srcHeight              float dstAspectRatio   dstWidth   dstHeight                  recycleDecodedBitmap is used to know if we must recycle intermediary  decodedBitmap                  DO NOT recycle it right away  wait for end of bitmap manipulation process to avoid                java lang RuntimeException  Canvas  trying to use a recycled bitmap android graphics Bitmap 416ee7d8                I do not excatly understand why  but this way it s OK              boolean recycleDecodedBitmap   false               Bitmap scaledBitmap   decodedBitmap              if  srcAspectRatio  lt  dstAspectRatio                                scaledBitmap   getScaledBitmap decodedBitmap   int  dstWidth   int   srcHeight    dstWidth   srcWidth                        will recycle recycleDecodedBitmap                 recycleDecodedBitmap   true                            else if  srcAspectRatio  gt  dstAspectRatio                                scaledBitmap   getScaledBitmap decodedBitmap   int   srcWidth    dstHeight   srcHeight     int  dstHeight                   recycleDecodedBitmap   true                                crop image to match required image size              int scaledBitmapWidth   scaledBitmap getWidth                int scaledBitmapHeight   scaledBitmap getHeight                 Bitmap croppedBitmap   scaledBitmap               if  scaledBitmapWidth  gt  requiredWidth                                int xOffset    scaledBitmapWidth - requiredWidth    2                  croppedBitmap   Bitmap createBitmap scaledBitmap  xOffset  0  requiredWidth  requiredHeight                   scaledBitmap recycle                              else if  scaledBitmapHeight  gt  requiredHeight                                int yOffset    scaledBitmapHeight - requiredHeight    2                  croppedBitmap   Bitmap createBitmap scaledBitmap  0  yOffset  requiredWidth  requiredHeight                   scaledBitmap recycle                               if  recycleDecodedBitmap                                decodedBitmap recycle                              decodedBitmap   null               scaledBitmap   null              return croppedBitmap                    catch  Exception ex                        ex printStackTrace                      return null                        compute powerOf2 or exact scale to be used as   link BitmapFactory Options inSampleSize  value  for subSampling                  param requiredWidth         param requiredHeight         param powerOf2                   weither we want a power of 2 sclae or not         return             public static int computeInSampleSize BitmapFactory Options options  int dstWidth  int dstHeight  boolean powerOf2                int inSampleSize   1              Raw height and width of image         final int srcHeight   options outHeight          final int srcWidth   options outWidth           if  powerOf2                          Find the correct scale value  It should be the power of 2               int tmpWidth   srcWidth  tmpHeight   srcHeight              while  true                                if  tmpWidth   2  lt  dstWidth    tmpHeight   2  lt  dstHeight                      break                  tmpWidth    2                  tmpHeight    2                  inSampleSize    2                                  else                          Calculate ratios of height and width to requested height and width             final int heightRatio   Math round  float  srcHeight    float  dstHeight               final int widthRatio   Math round  float  srcWidth    float  dstWidth                   Choose the smallest ratio as inSampleSize value  this will guarantee                a final image with both dimensions larger than or equal to the                requested height and width              inSampleSize   heightRatio  lt  widthRatio   heightRatio   widthRatio                     return inSampleSize             public static Bitmap drawableToBitmap Drawable drawable                if  drawable instanceof BitmapDrawable                        return   BitmapDrawable  drawable  getBitmap                       Bitmap bitmap   Bitmap createBitmap drawable getIntrinsicWidth    drawable getIntrinsicHeight    Config ARGB 8888           Canvas canvas   new Canvas bitmap           drawable setBounds 0  0  canvas getWidth    canvas getHeight             drawable draw canvas            return bitmap             public static Bitmap getScaledBitmap Bitmap bitmap  int newWidth  int newHeight                int width   bitmap getWidth            int height   bitmap getHeight            float scaleWidth     float  newWidth    width          float scaleHeight     float  newHeight    height              CREATE A MATRIX FOR THE MANIPULATION         Matrix matrix   new Matrix               RESIZE THE BIT MAP         matrix postScale scaleWidth  scaleHeight               RECREATE THE NEW BITMAP         Bitmap resizedBitmap   Bitmap createBitmap bitmap  0  0  width  height  matrix  false           return resizedBitmap

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I have seen a lot of questions about OOM exceptions and caching lately  The developer guide has a really good article on this  but some tends to fail on implementing it in a suitable way    Because of this I wrote an example application that demonstrates caching in an Android environment  This implementation has not yet gotten an OOM   Look at the end of this answer for a link to the source code   Requirements    Android API 2 1 or higher  I simply could not manage to get the available memory for an application in API 1 6 - that is the only piece of code that doesn t work in API 1 6  Android support package     Features    Retains the cache if there is an orientation change  using a singleton Use one eighth of the assigned application memory to the cache  modify if you want   Large bitmaps gets scaled  you can define the maximum pixels that you want to allow  Controls that there is an internet connection available before downloading the bitmaps Makes sure that you are only instantiating one task per row If you are flinging the ListView away  it simply won t download the bitmaps between   This does not include    Disk caching  This should be easy to implement anyway - just point to a different task that grabs the bitmaps from the disk   Sample code   The images that are being downloaded are images  75x75  from Flickr  However  put whatever image urls you want to be processed  and the application will scale it down if it exceeds the maximum  In this application the urls are simply in a String array   The LruCache has a good way to deal with bitmaps  However  in this application I put an instance of an LruCache inside another cache class that I created in order to get the application more feasible   Cache java s critical stuff  the loadBitmap   method is the most important    public Cache int size  int maxWidth  int maxHeight           Into the constructor you add the maximum pixels        that you want to allow in order to not scale images      mMaxWidth   maxWidth      mMaxHeight   maxHeight       mBitmapCache   new LruCache lt String  Bitmap gt  size            protected int sizeOf String key  Bitmap b                   Assuming that one pixel contains four bytes              return b getHeight     b getWidth     4                        mCurrentTasks   new ArrayList lt String gt                   Gets a bitmap from cache      If it is not in cache  this method will         1  check if the bitmap url is currently being processed in the    BitmapLoaderTask and cancel if it is already in a task  a control to see    if it s inside the currentTasks list          2  check if an internet connection is available and continue if so         3  download the bitmap  scale the bitmap if necessary and put it into    the memory cache         4  Remove the bitmap url from the currentTasks list         5  Notify the ListAdapter          param mainActivity - Reference to activity object  in order to    call notifyDataSetChanged   on the ListAdapter      param imageKey - The bitmap url  will be the key       param imageView - The ImageView that should get an    available bitmap or a placeholder image      param isScrolling - If set to true  we skip executing more tasks since    the user probably has flinged away the view      public void loadBitmap MainActivity mainActivity           String imageKey  ImageView imageView          boolean isScrolling        final Bitmap bitmap   getBitmapFromCache imageKey         if  bitmap    null            imageView setImageBitmap bitmap         else           imageView setImageResource R drawable ic launcher           if   isScrolling  amp  amp   mCurrentTasks contains imageKey   amp  amp                   mainActivity internetIsAvailable                  BitmapLoaderTask task   new BitmapLoaderTask imageKey                      mainActivity getAdapter                 task execute                         You shouldn t need to edit anything in the Cache java file unless you want to implement disk caching   MainActivity java s critical stuff   public void onScrollStateChanged AbsListView view  int scrollState        if  view getId      android R id list               Set scrolling to true only if the user has flinged the                   ListView away  hence we skip downloading a series            of unnecessary bitmaps that the user probably            just want to skip anyways  If we scroll slowly it            will still download bitmaps - that means            that the application won t wait for the user            to lift its finger off the screen in order to            download          if  scrollState    SCROLL STATE FLING                mIsScrolling   true            else               mIsScrolling   false              mListAdapter notifyDataSetChanged                           Inside ListAdapter     Override public View getView final int position  View convertView  ViewGroup parent                   View row   convertView      final ViewHolder holder       if  row    null            LayoutInflater inflater   getLayoutInflater            row   inflater inflate R layout main listview row  parent  false             holder   new ViewHolder row           row setTag holder         else           holder    ViewHolder  row getTag                  final Row rowObject   getItem position           Look at the loadBitmap   method description        holder mTextView setText rowObject mText             mCache loadBitmap MainActivity this              rowObject mBitmapUrl  holder mImageView              mIsScrolling          return row      getView   gets called very often  It s normally not a good idea to download images there if we haven t implemented a check that ensure us that we won t start an infinite amount of threads per row  Cache java checks whether the rowObject mBitmapUrl already is in a task and if it is  it won t start another  Therefore  we are most likely not exceeding the work queue restriction from the AsyncTask pool   Download   You can download the source code from https   www dropbox com s pvr9zyl811tfeem ListViewImageCache zip     Last words   I have tested this for a few weeks now  I haven t gotten a single OOM exception yet  I have tested this on the emulator  on my Nexus One and on my Nexus S  I have tested image urls that contain images that were in HD quality  The only bottleneck is that it takes more time to download   There is only one possible scenario where I can imagine that the OOM will appear  and that is if we download many  really big images  and before they get scaled and put into cache  will simultaneously take up more memory and cause an OOM  But that isn t even an ideal situation anyway and it most likely won t be possible to solve in a more feasible way   Report errors in the comments   -

User · Answer

Use this bitmap recycle    This helps without any image quality issue

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I have resolved the same issue in the following manner   Bitmap b   null  Drawable d  ImageView i   new ImageView mContext   try       b   Bitmap createBitmap 320 424 Bitmap Config RGB 565       b eraseColor 0xFFFFFFFF       Rect r   new Rect 0  0 320   424       Canvas c   new Canvas b       Paint p   new Paint        p setColor 0xFFC0C0C0       c drawRect r  p       d   mContext getResources   getDrawable mImageIds position        d setBounds r       d draw c                      BitmapFactory Options o2   new BitmapFactory Options            o2 inTempStorage   new byte 128 1024           b   BitmapFactory decodeStream mContext getResources   openRawResource mImageIds position    null  o2           o2 inSampleSize 16          o2 inPurgeable   true           catch  Exception e       i setImageBitmap b

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This seems like the appropriate place to share my utility class for loading and processing images with the community  you are welcome to use it and modify it freely   package com emil   import java io IOException  import java io InputStream   import android graphics Bitmap  import android graphics BitmapFactory          A class to load and process images of various sizes from input streams and file paths          author Emil http   stackoverflow com users 220710 emil        public class ImageProcessing        public static Bitmap getBitmap InputStream stream  int sampleSize  Bitmap Config bitmapConfig  throws IOException          BitmapFactory Options options ImageProcessing getOptionsForSampling sampleSize  bitmapConfig           Bitmap bm   BitmapFactory decodeStream stream null options           if ImageProcessing checkDecode options                return bm           else              throw new IOException  Image decoding failed  using stream                          public static Bitmap getBitmap String imgPath  int sampleSize  Bitmap Config bitmapConfig  throws IOException          BitmapFactory Options options ImageProcessing getOptionsForSampling sampleSize  bitmapConfig           Bitmap bm   BitmapFactory decodeFile imgPath options           if ImageProcessing checkDecode options                return bm           else              throw new IOException  Image decoding failed  using file path                          public static Dimensions getDimensions InputStream stream  throws IOException          BitmapFactory Options options ImageProcessing getOptionsForDimensions            BitmapFactory decodeStream stream null options           if ImageProcessing checkDecode options                return new ImageProcessing Dimensions options outWidth options outHeight            else              throw new IOException  Image decoding failed  using stream                          public static Dimensions getDimensions String imgPath  throws IOException          BitmapFactory Options options ImageProcessing getOptionsForDimensions            BitmapFactory decodeFile imgPath options           if ImageProcessing checkDecode options                return new ImageProcessing Dimensions options outWidth options outHeight            else              throw new IOException  Image decoding failed  using file path                          private static boolean checkDecode BitmapFactory Options options              Did decode work          if  options outWidth lt 0    options outHeight lt 0                return false           else              return true                                  Creates a Bitmap that is of the minimum dimensions necessary         param bm         param min         return             public static Bitmap createMinimalBitmap Bitmap bm  ImageProcessing Minimize min           int newWidth  newHeight          switch min type           case WIDTH              if bm getWidth   gt min minWidth                   newWidth min minWidth                  newHeight ImageProcessing getScaledHeight newWidth  bm                else                     No resize                 newWidth bm getWidth                    newHeight bm getHeight                              break          case HEIGHT              if bm getHeight   gt min minHeight                   newHeight min minHeight                  newWidth ImageProcessing getScaledWidth newHeight  bm                else                     No resize                 newWidth bm getWidth                    newHeight bm getHeight                              break          case BOTH     minimize to the maximum dimension         case MAX              if bm getHeight   gt bm getWidth                        Height needs to minimized                 min minDim min minDim  null   min minDim   min minHeight                  if bm getHeight   gt min minDim                       newHeight min minDim                      newWidth ImageProcessing getScaledWidth newHeight  bm                    else                         No resize                     newWidth bm getWidth                        newHeight bm getHeight                                   else                     Width needs to be minimized                 min minDim min minDim  null   min minDim   min minWidth                  if bm getWidth   gt min minDim                       newWidth min minDim                      newHeight ImageProcessing getScaledHeight newWidth  bm                    else                         No resize                     newWidth bm getWidth                        newHeight bm getHeight                                                break          default                 No resize             newWidth bm getWidth                newHeight bm getHeight                      return Bitmap createScaledBitmap bm  newWidth  newHeight  true              public static int getScaledWidth int height  Bitmap bm           return  int    double bm getWidth   bm getHeight    height              public static int getScaledHeight int width  Bitmap bm           return  int    double bm getHeight   bm getWidth    width                         Get the proper sample size to meet minimization restraints         param dim         param min         param multipleOf2 for fastest processing it is recommended that the sample size be a multiple of 2         return             public static int getSampleSize ImageProcessing Dimensions dim  ImageProcessing Minimize min  boolean multipleOf2           switch min type           case WIDTH              return ImageProcessing getMaxSampleSize dim width  min minWidth  multipleOf2           case HEIGHT              return ImageProcessing getMaxSampleSize dim height  min minHeight  multipleOf2           case BOTH              int widthMaxSampleSize ImageProcessing getMaxSampleSize dim width  min minWidth  multipleOf2               int heightMaxSampleSize ImageProcessing getMaxSampleSize dim height  min minHeight  multipleOf2                  Return the smaller of the two             if widthMaxSampleSize lt heightMaxSampleSize                   return widthMaxSampleSize               else                  return heightMaxSampleSize                        case MAX                 Find the larger dimension and go bases on that             if dim width gt dim height                   return ImageProcessing getMaxSampleSize dim width  min minDim  multipleOf2                else                  return ImageProcessing getMaxSampleSize dim height  min minDim  multipleOf2                                   return 1             public static int getMaxSampleSize int dim  int min  boolean multipleOf2           int add multipleOf2   2   1          int size 0          while min lt  dim  size add                 size  add                    size   size  0   1   size          return size                     public static class Dimensions           int width          int height           public Dimensions int width  int height                super                this width   width              this height   height                      Override         public String toString                 return width   x   height                       public static class Minimize           public enum Type               WIDTH HEIGHT BOTH MAX                   Integer minWidth          Integer minHeight          Integer minDim          Type type           public Minimize int min  Type type                super                this type   type              switch type               case WIDTH                  this minWidth min                  break              case HEIGHT                  this minHeight min                  break              case BOTH                  this minWidth min                  this minHeight min                  break              case MAX                  this minDim min                  break                                   public Minimize int minWidth  int minHeight                super                this type Type BOTH              this minWidth   minWidth              this minHeight   minHeight                                   Estimates size of Bitmap in bytes depending on dimensions and Bitmap Config         param width         param height         param config         return             public static long estimateBitmapBytes int width  int height  Bitmap Config config           long pixels width height          switch config           case ALPHA 8     1 byte per pixel             return pixels          case ARGB 4444     2 bytes per pixel  but depreciated             return pixels 2          case ARGB 8888     4 bytes per pixel             return pixels 4          case RGB 565     2 bytes per pixel             return pixels 2          default              return pixels                       private static BitmapFactory Options getOptionsForDimensions            BitmapFactory Options options   new BitmapFactory Options            options inJustDecodeBounds true          return options             private static BitmapFactory Options getOptionsForSampling int sampleSize  Bitmap Config bitmapConfig           BitmapFactory Options options   new BitmapFactory Options            options inJustDecodeBounds   false          options inDither   false          options inSampleSize   sampleSize          options inScaled   false          options inPreferredConfig   bitmapConfig          return options

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Hi Please visit the  link http   developer android com training displaying-bitmaps index html  or just try to retrieve bitmap with the given function  private Bitmap decodeBitmapFile  File f        Bitmap bitmap   null      try              Decode image size         BitmapFactory Options o   new BitmapFactory Options             o inJustDecodeBounds   true           FileInputStream fis   new FileInputStream  f           try               BitmapFactory decodeStream  fis  null  o             finally               fis close                        int scale   1          for  int size   Math max  o outHeight  o outWidth                 size gt  gt  scale-1    gt  IMAGE MAX SIZE    scale               Decode with input-stram SampleSize         BitmapFactory Options o2   new BitmapFactory Options             o2 inSampleSize   scale          fis   new FileInputStream  f           try               bitmap    BitmapFactory decodeStream  fis  null  o2             finally               fis close                     catch  IOException e              return bitmap

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I have resolved the same issue in the following manner   Bitmap b   null  Drawable d  ImageView i   new ImageView mContext   try       b   Bitmap createBitmap 320 424 Bitmap Config RGB 565       b eraseColor 0xFFFFFFFF       Rect r   new Rect 0  0 320   424       Canvas c   new Canvas b       Paint p   new Paint        p setColor 0xFFC0C0C0       c drawRect r  p       d   mContext getResources   getDrawable mImageIds position        d setBounds r       d draw c                      BitmapFactory Options o2   new BitmapFactory Options            o2 inTempStorage   new byte 128 1024           b   BitmapFactory decodeStream mContext getResources   openRawResource mImageIds position    null  o2           o2 inSampleSize 16          o2 inPurgeable   true           catch  Exception e       i setImageBitmap b

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There are two issues here       Bitmap memory isn t in the VM heap but rather in the native heap - see BitmapFactory OOM driving me nuts Garbage collection for the native heap is lazier than the VM heap - so you need to be quite aggressive about doing bitmap recycle and bitmap  null every time you go through an Activity s onPause or onDestroy

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I have a much more effective solution which does not need scaling of any sort  Simply decode your bitmap only once and then cache it in a map against its name  Then simply retrieve the bitmap against the name and set it in the ImageView  There is nothing more that needs to be done   This will work because the actual binary data of the decoded bitmap is not stored within the dalvik VM heap  It is stored externally  So every time you decode a bitmap  it allocates memory outside of VM heap which is never reclaimed by GC  To help you better appreciate this  imagine you have kept ur image in the drawable folder  You just get the image by doing a getResources   getDrwable R drawable    This will NOT decode your image everytime but re-use an already decoded instance everytime you call it  So in essence it is cached   Now since your image is in a file somewhere  or may even be coming from an external server   it is YOUR responsibility to cache the decoded bitmap instance to be reused any where it is needed   Hope this helps

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This seems like the appropriate place to share my utility class for loading and processing images with the community  you are welcome to use it and modify it freely   package com emil   import java io IOException  import java io InputStream   import android graphics Bitmap  import android graphics BitmapFactory          A class to load and process images of various sizes from input streams and file paths          author Emil http   stackoverflow com users 220710 emil        public class ImageProcessing        public static Bitmap getBitmap InputStream stream  int sampleSize  Bitmap Config bitmapConfig  throws IOException          BitmapFactory Options options ImageProcessing getOptionsForSampling sampleSize  bitmapConfig           Bitmap bm   BitmapFactory decodeStream stream null options           if ImageProcessing checkDecode options                return bm           else              throw new IOException  Image decoding failed  using stream                          public static Bitmap getBitmap String imgPath  int sampleSize  Bitmap Config bitmapConfig  throws IOException          BitmapFactory Options options ImageProcessing getOptionsForSampling sampleSize  bitmapConfig           Bitmap bm   BitmapFactory decodeFile imgPath options           if ImageProcessing checkDecode options                return bm           else              throw new IOException  Image decoding failed  using file path                          public static Dimensions getDimensions InputStream stream  throws IOException          BitmapFactory Options options ImageProcessing getOptionsForDimensions            BitmapFactory decodeStream stream null options           if ImageProcessing checkDecode options                return new ImageProcessing Dimensions options outWidth options outHeight            else              throw new IOException  Image decoding failed  using stream                          public static Dimensions getDimensions String imgPath  throws IOException          BitmapFactory Options options ImageProcessing getOptionsForDimensions            BitmapFactory decodeFile imgPath options           if ImageProcessing checkDecode options                return new ImageProcessing Dimensions options outWidth options outHeight            else              throw new IOException  Image decoding failed  using file path                          private static boolean checkDecode BitmapFactory Options options              Did decode work          if  options outWidth lt 0    options outHeight lt 0                return false           else              return true                                  Creates a Bitmap that is of the minimum dimensions necessary         param bm         param min         return             public static Bitmap createMinimalBitmap Bitmap bm  ImageProcessing Minimize min           int newWidth  newHeight          switch min type           case WIDTH              if bm getWidth   gt min minWidth                   newWidth min minWidth                  newHeight ImageProcessing getScaledHeight newWidth  bm                else                     No resize                 newWidth bm getWidth                    newHeight bm getHeight                              break          case HEIGHT              if bm getHeight   gt min minHeight                   newHeight min minHeight                  newWidth ImageProcessing getScaledWidth newHeight  bm                else                     No resize                 newWidth bm getWidth                    newHeight bm getHeight                              break          case BOTH     minimize to the maximum dimension         case MAX              if bm getHeight   gt bm getWidth                        Height needs to minimized                 min minDim min minDim  null   min minDim   min minHeight                  if bm getHeight   gt min minDim                       newHeight min minDim                      newWidth ImageProcessing getScaledWidth newHeight  bm                    else                         No resize                     newWidth bm getWidth                        newHeight bm getHeight                                   else                     Width needs to be minimized                 min minDim min minDim  null   min minDim   min minWidth                  if bm getWidth   gt min minDim                       newWidth min minDim                      newHeight ImageProcessing getScaledHeight newWidth  bm                    else                         No resize                     newWidth bm getWidth                        newHeight bm getHeight                                                break          default                 No resize             newWidth bm getWidth                newHeight bm getHeight                      return Bitmap createScaledBitmap bm  newWidth  newHeight  true              public static int getScaledWidth int height  Bitmap bm           return  int    double bm getWidth   bm getHeight    height              public static int getScaledHeight int width  Bitmap bm           return  int    double bm getHeight   bm getWidth    width                         Get the proper sample size to meet minimization restraints         param dim         param min         param multipleOf2 for fastest processing it is recommended that the sample size be a multiple of 2         return             public static int getSampleSize ImageProcessing Dimensions dim  ImageProcessing Minimize min  boolean multipleOf2           switch min type           case WIDTH              return ImageProcessing getMaxSampleSize dim width  min minWidth  multipleOf2           case HEIGHT              return ImageProcessing getMaxSampleSize dim height  min minHeight  multipleOf2           case BOTH              int widthMaxSampleSize ImageProcessing getMaxSampleSize dim width  min minWidth  multipleOf2               int heightMaxSampleSize ImageProcessing getMaxSampleSize dim height  min minHeight  multipleOf2                  Return the smaller of the two             if widthMaxSampleSize lt heightMaxSampleSize                   return widthMaxSampleSize               else                  return heightMaxSampleSize                        case MAX                 Find the larger dimension and go bases on that             if dim width gt dim height                   return ImageProcessing getMaxSampleSize dim width  min minDim  multipleOf2                else                  return ImageProcessing getMaxSampleSize dim height  min minDim  multipleOf2                                   return 1             public static int getMaxSampleSize int dim  int min  boolean multipleOf2           int add multipleOf2   2   1          int size 0          while min lt  dim  size add                 size  add                    size   size  0   1   size          return size                     public static class Dimensions           int width          int height           public Dimensions int width  int height                super                this width   width              this height   height                      Override         public String toString                 return width   x   height                       public static class Minimize           public enum Type               WIDTH HEIGHT BOTH MAX                   Integer minWidth          Integer minHeight          Integer minDim          Type type           public Minimize int min  Type type                super                this type   type              switch type               case WIDTH                  this minWidth min                  break              case HEIGHT                  this minHeight min                  break              case BOTH                  this minWidth min                  this minHeight min                  break              case MAX                  this minDim min                  break                                   public Minimize int minWidth  int minHeight                super                this type Type BOTH              this minWidth   minWidth              this minHeight   minHeight                                   Estimates size of Bitmap in bytes depending on dimensions and Bitmap Config         param width         param height         param config         return             public static long estimateBitmapBytes int width  int height  Bitmap Config config           long pixels width height          switch config           case ALPHA 8     1 byte per pixel             return pixels          case ARGB 4444     2 bytes per pixel  but depreciated             return pixels 2          case ARGB 8888     4 bytes per pixel             return pixels 4          case RGB 565     2 bytes per pixel             return pixels 2          default              return pixels                       private static BitmapFactory Options getOptionsForDimensions            BitmapFactory Options options   new BitmapFactory Options            options inJustDecodeBounds true          return options             private static BitmapFactory Options getOptionsForSampling int sampleSize  Bitmap Config bitmapConfig           BitmapFactory Options options   new BitmapFactory Options            options inJustDecodeBounds   false          options inDither   false          options inSampleSize   sampleSize          options inScaled   false          options inPreferredConfig   bitmapConfig          return options

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All the solutions here require setting a IMAGE MAX SIZE  This limits devices with more powerful hardware and if the image size is too low it looks ugly on the HD screen   I came out with a solution that works with my Samsung Galaxy S3 and several other devices including less powerful ones  with better image quality when a more powerful device is used   The gist of it is to calculate the maximum memory allocated for the app on a particular device  then set the scale to be lowest possible without exceeding this memory  Here s the code   public static Bitmap decodeFile File f        Bitmap b   null      try                  Decode image size         BitmapFactory Options o   new BitmapFactory Options            o inJustDecodeBounds   true           FileInputStream fis   new FileInputStream f           try                       BitmapFactory decodeStream fis  null  o                     finally                       fis close                          In Samsung Galaxy S3  typically max memory is 64mb            Camera max resolution is 3264 x 2448  times 4 to get Bitmap memory of 30 5mb for one bitmap            If we use scale of 2  resolution will be halved  1632 x 1224 and x 4 to get Bitmap memory of 7 62mb            We try use 25  memory which equals to 16mb maximum for one bitmap         long maxMemory   Runtime getRuntime   maxMemory            int maxMemoryForImage    int   maxMemory   100   25               Refer to            http   developer android com training displaying-bitmaps cache-bitmap html            A full screen GridView filled with images on a device with            800x480 resolution would use around 1 5MB  800 480 4 bytes             When bitmap option s inSampleSize doubled  pixel height and            weight both reduce in half         int scale   1          while   o outWidth   scale     o outHeight   scale    4  gt  maxMemoryForImage          scale    2              Decode with inSampleSize         BitmapFactory Options o2   new BitmapFactory Options            o2 inSampleSize   scale          fis   new FileInputStream f           try                       b   BitmapFactory decodeStream fis  null  o2                     finally                       fis close                        catch  IOException e                  return b      I set the maximum memory used by this bitmap to be 25  of maximum allocated memory  you may need to adjust this to your needs and make sure this bitmap is cleaned up and don t stay in memory when you ve finished using it  Typically I use this code to perform image rotation  source and destination bitmap  so my app needs to load 2 bitmaps in memory at the same time  and 25  gives me a good buffer without running out of memory when performing image rotation   Hope this helps someone out there

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Add the following lines to your manifest xml file    lt application      android hardwareAccelerated  false      android largeHeap  true  gt        lt activity gt       lt  activity gt    lt  application gt

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The Android Training class   Displaying Bitmaps Efficiently   offers some great information for understanding and dealing with the exception java lang OutOfMemoryError  bitmap size exceeds VM budget when loading Bitmaps     Read Bitmap Dimensions and Type  The BitmapFactory class provides several decoding methods  decodeByteArray    decodeFile    decodeResource    etc   for creating a Bitmap from various sources  Choose the most appropriate decode method based on your image data source  These methods attempt to allocate memory for the constructed bitmap and therefore can easily result in an OutOfMemory exception  Each type of decode method has additional signatures that let you specify decoding options via the BitmapFactory Options class  Setting the inJustDecodeBounds property to true while decoding avoids memory allocation  returning null for the bitmap object but setting outWidth  outHeight and outMimeType  This technique allows you to read the dimensions and type of the image data prior to construction  and memory allocation  of the bitmap   BitmapFactory Options options   new BitmapFactory Options    options inJustDecodeBounds   true  BitmapFactory decodeResource getResources    R id myimage  options   int imageHeight   options outHeight  int imageWidth   options outWidth  String imageType   options outMimeType    To avoid java lang OutOfMemory exceptions  check the dimensions of a bitmap before decoding it  unless you absolutely trust the source to provide you with predictably sized image data that comfortably fits within the available memory     Load a scaled down version into Memory  Now that the image dimensions are known  they can be used to decide if the full image should be loaded into memory or if a subsampled version should be loaded instead  Here are some factors to consider    Estimated memory usage of loading the full image in memory  The amount of memory you are willing to commit to loading this image given any other memory requirements of your application  Dimensions of the target ImageView or UI component that the image is to be loaded into  Screen size and density of the current device    For example  it   s not worth loading a 1024x768 pixel image into memory if it will eventually be displayed in a 128x96 pixel thumbnail in an ImageView   To tell the decoder to subsample the image  loading a smaller version into memory  set inSampleSize to true in your BitmapFactory Options object  For example  an image with resolution 2048x1536 that is decoded with an inSampleSize of 4 produces a bitmap of approximately 512x384  Loading this into memory uses 0 75MB rather than 12MB for the full image  assuming a bitmap configuration of ARGB 8888   Here   s a method to calculate a sample size value that is a power of two based on a target width and height   public static int calculateInSampleSize          BitmapFactory Options options  int reqWidth  int reqHeight           Raw height and width of image     final int height   options outHeight      final int width   options outWidth      int inSampleSize   1       if  height  gt  reqHeight    width  gt  reqWidth             final int halfHeight   height   2          final int halfWidth   width   2              Calculate the largest inSampleSize value that is a power of 2 and keeps both            height and width larger than the requested height and width          while   halfHeight   inSampleSize   gt  reqHeight                  amp  amp   halfWidth   inSampleSize   gt  reqWidth                inSampleSize    2                       return inSampleSize         Note  A power of two value is calculated because the decoder uses a   final value by rounding down to the nearest power of two  as per the   inSampleSize documentation    To use this method  first decode with inJustDecodeBounds set to true  pass the options through and then decode again using the new inSampleSize value and inJustDecodeBounds set to false   public static Bitmap decodeSampledBitmapFromResource Resources res  int resId      int reqWidth  int reqHeight            First decode with inJustDecodeBounds true to check dimensions     final BitmapFactory Options options   new BitmapFactory Options        options inJustDecodeBounds   true      BitmapFactory decodeResource res  resId  options           Calculate inSampleSize     options inSampleSize   calculateInSampleSize options  reqWidth  reqHeight           Decode bitmap with inSampleSize set     options inJustDecodeBounds   false      return BitmapFactory decodeResource res  resId  options       This method makes it easy to load a bitmap of arbitrarily large size into an ImageView that displays a 100x100 pixel thumbnail  as shown in the following example code   mImageView setImageBitmap      decodeSampledBitmapFromResource getResources    R id myimage  100  100      You can follow a similar process to decode bitmaps from other sources  by substituting the appropriate BitmapFactory decode  method as needed

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use these code for every image in select from SdCard or drewable to convert bitmap object   Resources res   getResources    WindowManager window    WindowManager  getSystemService Context WINDOW SERVICE   Display display   window getDefaultDisplay     SuppressWarnings  deprecation   int width   display getWidth     SuppressWarnings  deprecation   int height   display getHeight    try       if  bitmap    null            bitmap recycle            bitmap   null          System gc              bitmap   Bitmap createScaledBitmap BitmapFactory          decodeFile ImageData Path get img pos  getPath             width  height  true     catch  OutOfMemoryError e        if  bitmap    null            bitmap recycle            bitmap   null          System gc              BitmapFactory Options options   new BitmapFactory Options        options inPreferredConfig   Config RGB 565      options inSampleSize   1      options inPurgeable   true      bitmapBitmap createScaledBitmap BitmapFactory decodeFile ImageData Path get img pos           getPath   toString    options   width  height true     return bitmap    use your image path instend of ImageData Path get img pos  getPath

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I used Decode File Descriptor which worked for me     FileInputStream  fileInputStream   null          try               fileInputStream    new FileInputStream file                FileDescriptor fd   fileInputStream getFD                Bitmap imageBitmap   decodeSampledBitmapFromDescriptor fd   612                      816               imageView setImageBitmap imageBitmap             catch  Exception e                e printStackTrace             finally               if fileInputStream    null                   try                       fileInputStream close                      catch  IOException e                        e printStackTrace                                                Code to decode Sampled Bitmap From File Descriptor               Decode and sample down a bitmap from a file input stream to the requested width and height                 param fileDescriptor The file descriptor to read from         param reqWidth       The requested width of the resulting bitmap         param reqHeight      The requested height of the resulting bitmap         return A bitmap sampled down from the original with the same aspect ratio and dimensions        that are equal to or greater than the requested width and height             public static Bitmap decodeSampledBitmapFromDescriptor              FileDescriptor fileDescriptor  int reqWidth  int reqHeight                First decode with inJustDecodeBounds true to check dimensions         final BitmapFactory Options options   new BitmapFactory Options            options inJustDecodeBounds   true          BitmapFactory decodeFileDescriptor fileDescriptor  null  options               Calculate inSampleSize         options inSampleSize   calculateInSampleSize options  reqWidth  reqHeight               Decode bitmap with inSampleSize set         options inJustDecodeBounds   false          return BitmapFactory decodeFileDescriptor fileDescriptor  null  options                         Calculate an inSampleSize for use in a   link android graphics BitmapFactory Options  object when decoding        bitmaps using the decode  methods from   link android graphics BitmapFactory   This implementation calculates        the closest inSampleSize that will result in the final decoded bitmap having a width and        height equal to or larger than the requested width and height  This implementation does not        ensure a power of 2 is returned for inSampleSize which can be faster when decoding but        results in a larger bitmap which isn t as useful for caching purposes                 param options   An options object with out  params already populated  run through a decode                          method with inJustDecodeBounds  true         param reqWidth  The requested width of the resulting bitmap         param reqHeight The requested height of the resulting bitmap         return The value to be used for inSampleSize             public static int calculateInSampleSize BitmapFactory Options options                                              int reqWidth  int reqHeight               Raw height and width of image         final int height   options outHeight          final int width   options outWidth          int inSampleSize   1           if  height  gt  reqHeight    width  gt  reqWidth                    Calculate ratios of height and width to requested height and width             final int heightRatio   Math round  float  height    float  reqHeight               final int widthRatio   Math round  float  width    float  reqWidth                   Choose the smallest ratio as inSampleSize value  this will guarantee a final image                with both dimensions larger than or equal to the requested height and width              inSampleSize   heightRatio  lt  widthRatio   heightRatio   widthRatio                  This offers some additional logic in case the image has a strange                aspect ratio  For example  a panorama may have a much larger                width than height  In these cases the total pixels might still                end up being too large to fit comfortably in memory  so we should                be more aggressive with sample down the image   larger inSampleSize                final float totalPixels   width   height                  Anything more than 2x the requested pixels we ll sample down further             final float totalReqPixelsCap   reqWidth   reqHeight   2               while  totalPixels    inSampleSize   inSampleSize   gt  totalReqPixelsCap                    inSampleSize                                    return inSampleSize

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Best practices to avoid memory leaks or OOM for bitmap   Do not keep bitmap references for long-lived to a Context   Activity  If you are using a large bitmap as background or something in your application then don   t pull the full image into the main memory  You can use the insample size property of bitmap to bring the size your screen needs  Clean bitmap reference once no longer use

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None of the answers above worked for me  but I did come up with a horribly ugly workaround that solved the problem  I added a very small  1x1 pixel image to my project as a resource  and loaded it into my ImageView before calling into garbage collection  I think it might be that the ImageView was not releasing the Bitmap  so GC never picked it up  It s ugly  but it seems to be working for now   if  bitmap    null      bitmap recycle      bitmap   null    if  imageView    null      imageView setImageResource R drawable tiny      This is my 1x1 png    System gc     imageView setImageBitmap          Do whatever you need to do to load the image you want

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This will get an appropriate bitmap and reduce memory consumption  JAVA  Bitmap bm   null   BitmapFactory Options bmpOption   new BitmapFactory Options    bmpOption inJustDecodeBounds   true   FileInputStream fis   new FileInputStream file   BitmapFactory decodeStream fis  null  bmpOption   fis close     int scale   1   if  bmpOption outHeight  gt  IMAGE MAX SIZE    bmpOption outWidth  gt  IMAGE MAX SIZE        scale    int Math pow 2   int  Math ceil Math log IMAGE MAX SIZE            double  Math max bmpOption outHeight  bmpOption outWidth     Math log 0 5        BitmapFactory Options bmpOption2   new BitmapFactory Options    bmpOption2 inSampleSize   scale  fis   new FileInputStream file   bm   BitmapFactory decodeStream fis  null  bmpOption2   fis close      Kotlin  val bm Bitmap   null val bmpOption   BitmapFactory Options   bmpOption inJustDecodeBounds   true val fis   FileInputStream file  BitmapFactory decodeStream fis  null  bmpOption  fis close   val scale   1 if  bmpOption outHeight  gt  IMAGE MAX SIZE    bmpOption outWidth  gt  IMAGE MAX SIZE      scale   Math pow 2 0  Math ceil  Math log  IMAGE MAX SIZE   Math max bmpOption outHeight  bmpOption outWidth  as Double     Math log 0 5    toInt   toDouble    toInt     val bmpOption2   BitmapFactory Options   bmpOption2 inSampleSize   scale fis   FileInputStream file  bm   BitmapFactory decodeStream fis  null  bmpOption2  fis close

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Such OutofMemoryException cannot be totally resolved by calling the System gc   and so on    By referring to the Activity Life Cycle  The Activity States are determined by the OS itself subject to the memory usage for each process and the priority of each process   You may consider the size and the resolution for each of the bitmap pictures used  I recommend to reduce the size  resample to lower resolution   refer to the design of galleries  one small picture PNG   and one original picture

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To fix OutOfMemory you should do something like that please try this code  public Bitmap loadBitmap String URL  BitmapFactory Options options                    Bitmap bitmap   null                  InputStream in   null                  options inSampleSize 4                  try                       in   OpenHttpConnection URL                       Log e  In     gt    in                          bitmap   BitmapFactory decodeStream in  null  options                       Log e  URL     gt    bitmap                           in close                      catch  IOException e1                                      return bitmap                  and  try                       BitmapFactory Options bmOptions                      bmOptions   new BitmapFactory Options                        bmOptions inSampleSize   1                      if studentImage    null                           galleryThumbnail  loadBitmap IMAGE URL studentImage  bmOptions                                                  galleryThumbnail getResizedBitmap galleryThumbnail  imgEditStudentPhoto getHeight    imgEditStudentPhoto getWidth                         Log e  Image Url   gt   IMAGE URL studentImage                         catch  Exception e                           TODO Auto-generated catch block                     e printStackTrace

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In one of my application i need to take picture either from Camera Gallery  If user click image from Camera may be 2MP  5MP or 8MP   image size varies from kBs to MBs  If image size is less or up to 1-2MB  above code working fine but if i have image of size above 4MB or 5MB then OOM comes in frame     then i have worked to solve this issue  amp  finally i ve made the below improvement to Fedor s All Credit to Fedor for making such a nice solution  code     private Bitmap decodeFile String fPath           Decode image size     BitmapFactory Options opts   new BitmapFactory Options                  If set to true  the decoder will return null  no bitmap   but the        out    fields will still be set  allowing the caller to query the        bitmap without having to allocate the memory for its pixels              opts inJustDecodeBounds   true      opts inDither   false     Disable Dithering mode     opts inPurgeable   true     Tell to gc that whether it needs free                                    memory  the Bitmap can be cleared     opts inInputShareable   true     Which kind of reference will be used to                                        recover the Bitmap data after being                                        clear  when it will be used in the                                        future      BitmapFactory decodeFile fPath  opts           The new size we want to scale to     final int REQUIRED SIZE   70          Find the correct scale value       int scale   1       if  opts outHeight  gt  REQUIRED SIZE    opts outWidth  gt  REQUIRED SIZE                Calculate ratios of height and width to requested height and width         final int heightRatio   Math round  float  opts outHeight                    float  REQUIRED SIZE           final int widthRatio   Math round  float  opts outWidth                    float  REQUIRED SIZE               Choose the smallest ratio as inSampleSize value  this will guarantee            a final image with both dimensions larger than or equal to the            requested height and width          scale   heightRatio  lt  widthRatio   heightRatio   widthRatio                  Decode bitmap with inSampleSize set     opts inJustDecodeBounds   false       opts inSampleSize   scale       Bitmap bm   BitmapFactory decodeFile fPath  opts  copy              Bitmap Config RGB 565  false        return bm       I hope this will help the buddies facing the same problem   for more please refer this

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It s a known bug  it s not because of large files  Since Android Caches the Drawables  it s going out of memory after using few images  But I ve found an alternate way for it  by skipping the android default cache system   Solution  Move the images to  assets  folder and use the following function to get BitmapDrawable   public static Drawable getAssetImage Context context  String filename  throws IOException       AssetManager assets   context getResources   getAssets        InputStream buffer   new BufferedInputStream  assets open  drawable     filename     png          Bitmap bitmap   BitmapFactory decodeStream buffer       return new BitmapDrawable context getResources    bitmap

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Hi Please visit the  link http   developer android com training displaying-bitmaps index html  or just try to retrieve bitmap with the given function  private Bitmap decodeBitmapFile  File f        Bitmap bitmap   null      try              Decode image size         BitmapFactory Options o   new BitmapFactory Options             o inJustDecodeBounds   true           FileInputStream fis   new FileInputStream  f           try               BitmapFactory decodeStream  fis  null  o             finally               fis close                        int scale   1          for  int size   Math max  o outHeight  o outWidth                 size gt  gt  scale-1    gt  IMAGE MAX SIZE    scale               Decode with input-stram SampleSize         BitmapFactory Options o2   new BitmapFactory Options             o2 inSampleSize   scale          fis   new FileInputStream  f           try               bitmap    BitmapFactory decodeStream  fis  null  o2             finally               fis close                     catch  IOException e              return bitmap

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This issue only happens in Android emulators  I also faced this issue in an emulator but when I checked in a device then it worked fine    So please check in a device  It may be run in device

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This will get an appropriate bitmap and reduce memory consumption  JAVA  Bitmap bm   null   BitmapFactory Options bmpOption   new BitmapFactory Options    bmpOption inJustDecodeBounds   true   FileInputStream fis   new FileInputStream file   BitmapFactory decodeStream fis  null  bmpOption   fis close     int scale   1   if  bmpOption outHeight  gt  IMAGE MAX SIZE    bmpOption outWidth  gt  IMAGE MAX SIZE        scale    int Math pow 2   int  Math ceil Math log IMAGE MAX SIZE            double  Math max bmpOption outHeight  bmpOption outWidth     Math log 0 5        BitmapFactory Options bmpOption2   new BitmapFactory Options    bmpOption2 inSampleSize   scale  fis   new FileInputStream file   bm   BitmapFactory decodeStream fis  null  bmpOption2   fis close      Kotlin  val bm Bitmap   null val bmpOption   BitmapFactory Options   bmpOption inJustDecodeBounds   true val fis   FileInputStream file  BitmapFactory decodeStream fis  null  bmpOption  fis close   val scale   1 if  bmpOption outHeight  gt  IMAGE MAX SIZE    bmpOption outWidth  gt  IMAGE MAX SIZE      scale   Math pow 2 0  Math ceil  Math log  IMAGE MAX SIZE   Math max bmpOption outHeight  bmpOption outWidth  as Double     Math log 0 5    toInt   toDouble    toInt     val bmpOption2   BitmapFactory Options   bmpOption2 inSampleSize   scale fis   FileInputStream file  bm   BitmapFactory decodeStream fis  null  bmpOption2  fis close

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There are two issues here       Bitmap memory isn t in the VM heap but rather in the native heap - see BitmapFactory OOM driving me nuts Garbage collection for the native heap is lazier than the VM heap - so you need to be quite aggressive about doing bitmap recycle and bitmap  null every time you go through an Activity s onPause or onDestroy

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Add the following lines to your manifest xml file    lt application      android hardwareAccelerated  false      android largeHeap  true  gt        lt activity gt       lt  activity gt    lt  application gt

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This works for me   Bitmap myBitmap   BitmapFactory Options options   new BitmapFactory Options     options InPurgeable   true  options OutHeight   50  options OutWidth   50  options InSampleSize   4   File imgFile   new File filepath   myBitmap   BitmapFactory DecodeFile imgFile AbsolutePath  options     and this is on C  monodroid  you can easily change the path of the image  what important here is the options to be set

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I ve made a small improvement to Fedor s code  It basically does the same  but without the  in my opinion  ugly while loop and it always results in a power of two  Kudos to Fedor for making the original solution  I was stuck until I found his  and then I was able to make this one      private Bitmap decodeFile File f       Bitmap b   null             Decode image size     BitmapFactory Options o   new BitmapFactory Options        o inJustDecodeBounds   true       FileInputStream fis   new FileInputStream f       BitmapFactory decodeStream fis  null  o       fis close         int scale   1      if  o outHeight  gt  IMAGE MAX SIZE    o outWidth  gt  IMAGE MAX SIZE            scale    int Math pow 2   int  Math ceil Math log IMAGE MAX SIZE                double  Math max o outHeight  o outWidth     Math log 0 5                  Decode with inSampleSize     BitmapFactory Options o2   new BitmapFactory Options        o2 inSampleSize   scale      fis   new FileInputStream f       b   BitmapFactory decodeStream fis  null  o2       fis close         return b

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I ve made a small improvement to Fedor s code  It basically does the same  but without the  in my opinion  ugly while loop and it always results in a power of two  Kudos to Fedor for making the original solution  I was stuck until I found his  and then I was able to make this one      private Bitmap decodeFile File f       Bitmap b   null             Decode image size     BitmapFactory Options o   new BitmapFactory Options        o inJustDecodeBounds   true       FileInputStream fis   new FileInputStream f       BitmapFactory decodeStream fis  null  o       fis close         int scale   1      if  o outHeight  gt  IMAGE MAX SIZE    o outWidth  gt  IMAGE MAX SIZE            scale    int Math pow 2   int  Math ceil Math log IMAGE MAX SIZE                double  Math max o outHeight  o outWidth     Math log 0 5                  Decode with inSampleSize     BitmapFactory Options o2   new BitmapFactory Options        o2 inSampleSize   scale      fis   new FileInputStream f       b   BitmapFactory decodeStream fis  null  o2       fis close         return b

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The Android Training class   Displaying Bitmaps Efficiently   offers some great information for understanding and dealing with the exception java lang OutOfMemoryError  bitmap size exceeds VM budget when loading Bitmaps     Read Bitmap Dimensions and Type  The BitmapFactory class provides several decoding methods  decodeByteArray    decodeFile    decodeResource    etc   for creating a Bitmap from various sources  Choose the most appropriate decode method based on your image data source  These methods attempt to allocate memory for the constructed bitmap and therefore can easily result in an OutOfMemory exception  Each type of decode method has additional signatures that let you specify decoding options via the BitmapFactory Options class  Setting the inJustDecodeBounds property to true while decoding avoids memory allocation  returning null for the bitmap object but setting outWidth  outHeight and outMimeType  This technique allows you to read the dimensions and type of the image data prior to construction  and memory allocation  of the bitmap   BitmapFactory Options options   new BitmapFactory Options    options inJustDecodeBounds   true  BitmapFactory decodeResource getResources    R id myimage  options   int imageHeight   options outHeight  int imageWidth   options outWidth  String imageType   options outMimeType    To avoid java lang OutOfMemory exceptions  check the dimensions of a bitmap before decoding it  unless you absolutely trust the source to provide you with predictably sized image data that comfortably fits within the available memory     Load a scaled down version into Memory  Now that the image dimensions are known  they can be used to decide if the full image should be loaded into memory or if a subsampled version should be loaded instead  Here are some factors to consider    Estimated memory usage of loading the full image in memory  The amount of memory you are willing to commit to loading this image given any other memory requirements of your application  Dimensions of the target ImageView or UI component that the image is to be loaded into  Screen size and density of the current device    For example  it   s not worth loading a 1024x768 pixel image into memory if it will eventually be displayed in a 128x96 pixel thumbnail in an ImageView   To tell the decoder to subsample the image  loading a smaller version into memory  set inSampleSize to true in your BitmapFactory Options object  For example  an image with resolution 2048x1536 that is decoded with an inSampleSize of 4 produces a bitmap of approximately 512x384  Loading this into memory uses 0 75MB rather than 12MB for the full image  assuming a bitmap configuration of ARGB 8888   Here   s a method to calculate a sample size value that is a power of two based on a target width and height   public static int calculateInSampleSize          BitmapFactory Options options  int reqWidth  int reqHeight           Raw height and width of image     final int height   options outHeight      final int width   options outWidth      int inSampleSize   1       if  height  gt  reqHeight    width  gt  reqWidth             final int halfHeight   height   2          final int halfWidth   width   2              Calculate the largest inSampleSize value that is a power of 2 and keeps both            height and width larger than the requested height and width          while   halfHeight   inSampleSize   gt  reqHeight                  amp  amp   halfWidth   inSampleSize   gt  reqWidth                inSampleSize    2                       return inSampleSize         Note  A power of two value is calculated because the decoder uses a   final value by rounding down to the nearest power of two  as per the   inSampleSize documentation    To use this method  first decode with inJustDecodeBounds set to true  pass the options through and then decode again using the new inSampleSize value and inJustDecodeBounds set to false   public static Bitmap decodeSampledBitmapFromResource Resources res  int resId      int reqWidth  int reqHeight            First decode with inJustDecodeBounds true to check dimensions     final BitmapFactory Options options   new BitmapFactory Options        options inJustDecodeBounds   true      BitmapFactory decodeResource res  resId  options           Calculate inSampleSize     options inSampleSize   calculateInSampleSize options  reqWidth  reqHeight           Decode bitmap with inSampleSize set     options inJustDecodeBounds   false      return BitmapFactory decodeResource res  resId  options       This method makes it easy to load a bitmap of arbitrarily large size into an ImageView that displays a 100x100 pixel thumbnail  as shown in the following example code   mImageView setImageBitmap      decodeSampledBitmapFromResource getResources    R id myimage  100  100      You can follow a similar process to decode bitmaps from other sources  by substituting the appropriate BitmapFactory decode  method as needed

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If you are lazy like me  you can start using Picasso library to load images  Picasso with context  load R drawable landing screen  into imageView1   Picasso with context  load  quot file    android asset DvpvklR png quot   into imageView2   Picasso with context  load new File       into imageView3

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My 2 cents  i solved my OOM errors with bitmaps by   a  scaling my images by a factor of 2  b  using Picasso library in my custom Adapter for a ListView  with a one-call in getView like this  Picasso with context  load R id myImage  into R id myImageView

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I just ran into this issue a couple minutes ago  I solved it by doing a better job at managing my listview adapter  I thought it was an issue with the hundreds of 50x50px images I was using  turns out I was trying to inflate my custom view each time the row was being shown  Simply by testing to see if the row had been inflated I eliminated this error  and I am using hundreds of bitmaps  This is actually for a Spinner  but the base adapter works all the same for a ListView  This simple fix also greatly improved the performance of the adapter      Override public View getView final int position  View convertView  final ViewGroup parent         if convertView    null           LayoutInflater inflater    LayoutInflater  mContext getSystemService Context LAYOUT INFLATER SERVICE           convertView   inflater inflate R layout spinner row  null

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This issue only happens in Android emulators  I also faced this issue in an emulator but when I checked in a device then it worked fine    So please check in a device  It may be run in device

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This worked for me   public Bitmap readAssetsBitmap String filename  throws IOException       try           BitmapFactory Options options   new BitmapFactory Options             options inPurgeable   true          Bitmap bitmap   BitmapFactory decodeStream assets open filename   null  options           if bitmap    null                throw new IOException  File cannot be opened  It s value is null              else               return bitmap                  catch  IOException e            throw new IOException  File cannot be opened      e getMessage

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I used Decode File Descriptor which worked for me     FileInputStream  fileInputStream   null          try               fileInputStream    new FileInputStream file                FileDescriptor fd   fileInputStream getFD                Bitmap imageBitmap   decodeSampledBitmapFromDescriptor fd   612                      816               imageView setImageBitmap imageBitmap             catch  Exception e                e printStackTrace             finally               if fileInputStream    null                   try                       fileInputStream close                      catch  IOException e                        e printStackTrace                                                Code to decode Sampled Bitmap From File Descriptor               Decode and sample down a bitmap from a file input stream to the requested width and height                 param fileDescriptor The file descriptor to read from         param reqWidth       The requested width of the resulting bitmap         param reqHeight      The requested height of the resulting bitmap         return A bitmap sampled down from the original with the same aspect ratio and dimensions        that are equal to or greater than the requested width and height             public static Bitmap decodeSampledBitmapFromDescriptor              FileDescriptor fileDescriptor  int reqWidth  int reqHeight                First decode with inJustDecodeBounds true to check dimensions         final BitmapFactory Options options   new BitmapFactory Options            options inJustDecodeBounds   true          BitmapFactory decodeFileDescriptor fileDescriptor  null  options               Calculate inSampleSize         options inSampleSize   calculateInSampleSize options  reqWidth  reqHeight               Decode bitmap with inSampleSize set         options inJustDecodeBounds   false          return BitmapFactory decodeFileDescriptor fileDescriptor  null  options                         Calculate an inSampleSize for use in a   link android graphics BitmapFactory Options  object when decoding        bitmaps using the decode  methods from   link android graphics BitmapFactory   This implementation calculates        the closest inSampleSize that will result in the final decoded bitmap having a width and        height equal to or larger than the requested width and height  This implementation does not        ensure a power of 2 is returned for inSampleSize which can be faster when decoding but        results in a larger bitmap which isn t as useful for caching purposes                 param options   An options object with out  params already populated  run through a decode                          method with inJustDecodeBounds  true         param reqWidth  The requested width of the resulting bitmap         param reqHeight The requested height of the resulting bitmap         return The value to be used for inSampleSize             public static int calculateInSampleSize BitmapFactory Options options                                              int reqWidth  int reqHeight               Raw height and width of image         final int height   options outHeight          final int width   options outWidth          int inSampleSize   1           if  height  gt  reqHeight    width  gt  reqWidth                    Calculate ratios of height and width to requested height and width             final int heightRatio   Math round  float  height    float  reqHeight               final int widthRatio   Math round  float  width    float  reqWidth                   Choose the smallest ratio as inSampleSize value  this will guarantee a final image                with both dimensions larger than or equal to the requested height and width              inSampleSize   heightRatio  lt  widthRatio   heightRatio   widthRatio                  This offers some additional logic in case the image has a strange                aspect ratio  For example  a panorama may have a much larger                width than height  In these cases the total pixels might still                end up being too large to fit comfortably in memory  so we should                be more aggressive with sample down the image   larger inSampleSize                final float totalPixels   width   height                  Anything more than 2x the requested pixels we ll sample down further             final float totalReqPixelsCap   reqWidth   reqHeight   2               while  totalPixels    inSampleSize   inSampleSize   gt  totalReqPixelsCap                    inSampleSize                                    return inSampleSize

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Use this bitmap recycle    This helps without any image quality issue

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This code will help to load large bitmap from drawable  public class BitmapUtilsTask extends AsyncTask lt Object  Void  Bitmap gt         Context context       public BitmapUtilsTask Context context            this context   context                        Loads a bitmap from the specified url                  param url The location of the bitmap asset         return The bitmap  or null if it could not be loaded         throws IOException         throws MalformedURLException             public Bitmap getBitmap   throws MalformedURLException  IOException                      Get the source image s dimensions         int desiredWidth   1000          BitmapFactory Options options   new BitmapFactory Options            options inJustDecodeBounds   true           BitmapFactory decodeResource context getResources    R drawable green background   options            int srcWidth   options outWidth          int srcHeight   options outHeight              Only scale if the source is big enough  This code is just trying            to fit a image into a certain width          if  desiredWidth  gt  srcWidth              desiredWidth   srcWidth              Calculate the correct inSampleSize scale value  This helps reduce            memory use  It should be a power of 2         int inSampleSize   1          while  srcWidth   2  gt  desiredWidth                srcWidth    2              srcHeight    2              inSampleSize    2                       Decode with inSampleSize         options inJustDecodeBounds   false          options inDither   false          options inSampleSize   inSampleSize          options inScaled   false          options inPreferredConfig   Bitmap Config ARGB 8888          options inPurgeable   true          Bitmap sampledSrcBitmap           sampledSrcBitmap    BitmapFactory decodeResource context getResources    R drawable green background   options            return sampledSrcBitmap                        The system calls this to perform work in a worker thread and delivers        it the parameters given to AsyncTask execute                Override     protected Bitmap doInBackground Object    item            try              return getBitmap              catch  MalformedURLException e                e printStackTrace              catch  IOException e                e printStackTrace                      return null

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I ve spent the entire day testing these solutions and the only thing that worked for me is the above approaches for getting the image and manually calling the GC  which I know is not supposed to be necessary  but it is the only thing that worked when I put my app under heavy load testing switching between activities   My app has a list of thumbnail images in a listview in  lets say activity A  and when you click on one of those images it takes you to another activity  lets say activity B  that shows a main image for that item   When I would switch back and forth between the two activities  I would eventually get the OOM error and the app would force close     When I would get half way down the listview it would crash   Now when I implement the following in activity B  I can go through the entire listview with no issue and keep going and going and going   and its plenty fast    Override public void onDestroy            Cleanup        super onDestroy       private void Cleanup             bitmap recycle        System gc        Runtime getRuntime   gc

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It seems that this is a very long running problem  with a lot of differing explanations   I took the advice of the two most common presented answers here  but neither one of these solved my problems of the VM claiming it couldn t afford the bytes to perform the decoding part of the process   After some digging I learned that the real problem here is the decoding process taking away from the NATIVE heap     See here  BitmapFactory OOM driving me nuts  That lead me to another discussion thread where I found a couple more solutions to this problem   One is to callSystem gc    manually after your image is displayed   But that actually makes your app use MORE memory  in an effort to reduce the native heap   The better solution as of the release of 2 0  Donut  is to use the BitmapFactory option  inPurgeable    So I simply added o2 inPurgeable true  just after o2 inSampleSize scale    More on that topic here  Is the limit of memory heap only 6M    Now  having said all of this  I am a complete dunce with Java and Android too   So if you think this is a terrible way to solve this problem  you are probably right    -   But this has worked wonders for me  and I have found it impossible to run the VM out of heap cache now   The only drawback I can find is that you are trashing your cached drawn image   Which means if you go RIGHT back to that image  you are redrawing it each and every time   In the case of how my application works  that is not really a problem   Your mileage may vary

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It seems that this is a very long running problem  with a lot of differing explanations   I took the advice of the two most common presented answers here  but neither one of these solved my problems of the VM claiming it couldn t afford the bytes to perform the decoding part of the process   After some digging I learned that the real problem here is the decoding process taking away from the NATIVE heap     See here  BitmapFactory OOM driving me nuts  That lead me to another discussion thread where I found a couple more solutions to this problem   One is to callSystem gc    manually after your image is displayed   But that actually makes your app use MORE memory  in an effort to reduce the native heap   The better solution as of the release of 2 0  Donut  is to use the BitmapFactory option  inPurgeable    So I simply added o2 inPurgeable true  just after o2 inSampleSize scale    More on that topic here  Is the limit of memory heap only 6M    Now  having said all of this  I am a complete dunce with Java and Android too   So if you think this is a terrible way to solve this problem  you are probably right    -   But this has worked wonders for me  and I have found it impossible to run the VM out of heap cache now   The only drawback I can find is that you are trashing your cached drawn image   Which means if you go RIGHT back to that image  you are redrawing it each and every time   In the case of how my application works  that is not really a problem   Your mileage may vary

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To fix the OutOfMemory error  you should do something like this   BitmapFactory Options options   new BitmapFactory Options    options inSampleSize   8  Bitmap preview bitmap   BitmapFactory decodeStream is  null  options     This inSampleSize option reduces memory consumption   Here s a complete method  First it reads image size without decoding the content itself  Then it finds the best inSampleSize value  it should be a power of 2  and finally the image is decoded      Decodes image and scales it to reduce memory consumption private Bitmap decodeFile File f        try              Decode image size         BitmapFactory Options o   new BitmapFactory Options            o inJustDecodeBounds   true          BitmapFactory decodeStream new FileInputStream f   null  o               The new size we want to scale to         final int REQUIRED SIZE 70              Find the correct scale value  It should be the power of 2          int scale   1          while o outWidth   scale   2  gt   REQUIRED SIZE  amp  amp                 o outHeight   scale   2  gt   REQUIRED SIZE                scale    2                        Decode with inSampleSize         BitmapFactory Options o2   new BitmapFactory Options            o2 inSampleSize   scale          return BitmapFactory decodeStream new FileInputStream f   null  o2         catch  FileNotFoundException e         return null

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I needed to load a large size image into Bitmap and I used Glide to solve this issue  First check the image size with BitmapFactory Options using inJustDecodeBounds set to true  then use Glide to get Bitmap object  I used the profiler to check memory usage but I did not see any memory spike like I did when I was using BitmapFactory decodeFile    I am writing in c  as I use Xamarin  so need a little tweak to use in Java  Glide library documentation private Bitmap DecodeFile File file               Decode image size         BitmapFactory Options options   new BitmapFactory Options                        setting inJustDecodeBounds to true won t load the file into memory              but gives you the actual file size          options InJustDecodeBounds   true          BitmapFactory decodeStream new FileInputStream file   null  options           int actualWidth   options OutWidth          int actualHeight   options OutHeight                           var ratio    double actualHeight   actualWidth              Default to 800 x 600  changed the size whatever you need          var desiredWidth   800          var desiredHeight   600           if actualHeight  gt  actualWidth                        var ratio    double actualWidth   actualHeight              var futureTarget   Glide With Application Context                   AsBitmap                    Load file                   SetDiskCacheStrategy DiskCacheStrategy None                   SkipMemoryCache true                   Submit  int  desiredWidth   ratio   desiredWidth               bitmap   futureTarget Get   as Bitmap                    else                       var ratio    double actualHeight   actualWidth              var futureTarget   Glide With Application Context                   AsBitmap                    Load file                   SetDiskCacheStrategy DiskCacheStrategy None                   SkipMemoryCache true                   Submit desiredWidth   int  desiredWidth   ratio                bitmap   futureTarget Get   as Bitmap           return bitmap

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This works for me   Bitmap myBitmap   BitmapFactory Options options   new BitmapFactory Options     options InPurgeable   true  options OutHeight   50  options OutWidth   50  options InSampleSize   4   File imgFile   new File filepath   myBitmap   BitmapFactory DecodeFile imgFile AbsolutePath  options     and this is on C  monodroid  you can easily change the path of the image  what important here is the options to be set

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After setting an bitmap to imageview  recycle it like this   bitmap recycle    bitmap null

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I come from iOS experience and I was frustrated to discover an issue with something so basic as loading and showing an image  After all  everyone that is having this issue is trying to display reasonably sized images  Anyway  here are the two changes that fixed my problem  and made my app very responsive    1  Every time you do BitmapFactory decodeXYZ    make sure to pass in a BitmapFactory Options with inPurgeable set to true  and preferably with inInputShareable also set to true    2  NEVER use Bitmap createBitmap width  height  Config ARGB 8888   I mean NEVER  I ve never had that thing not raise memory error after few passes  No amount of recycle    System gc    whatever helped  It always raised exception  The one other way that actually works is to have a dummy image in your drawables  or another Bitmap that you decoded using step 1 above   rescale that to whatever you want  then manipulate the resulting Bitmap  such as passing it on to a Canvas for more fun   So  what you should use instead is  Bitmap createScaledBitmap srcBitmap  width  height  false   If for whatever reason you MUST use the brute force create method  then at least pass Config ARGB 4444    This is almost guaranteed to save you hours if not days  All that talk about scaling the image  etc  does not really work  unless you consider getting wrong size or degraded image a solution

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use these code for every image in select from SdCard or drewable to convert bitmap object   Resources res   getResources    WindowManager window    WindowManager  getSystemService Context WINDOW SERVICE   Display display   window getDefaultDisplay     SuppressWarnings  deprecation   int width   display getWidth     SuppressWarnings  deprecation   int height   display getHeight    try       if  bitmap    null            bitmap recycle            bitmap   null          System gc              bitmap   Bitmap createScaledBitmap BitmapFactory          decodeFile ImageData Path get img pos  getPath             width  height  true     catch  OutOfMemoryError e        if  bitmap    null            bitmap recycle            bitmap   null          System gc              BitmapFactory Options options   new BitmapFactory Options        options inPreferredConfig   Config RGB 565      options inSampleSize   1      options inPurgeable   true      bitmapBitmap createScaledBitmap BitmapFactory decodeFile ImageData Path get img pos           getPath   toString    options   width  height true     return bitmap    use your image path instend of ImageData Path get img pos  getPath

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Best practices to avoid memory leaks or OOM for bitmap   Do not keep bitmap references for long-lived to a Context   Activity  If you are using a large bitmap as background or something in your application then don   t pull the full image into the main memory  You can use the insample size property of bitmap to bring the size your screen needs  Clean bitmap reference once no longer use

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If you are lazy like me  you can start using Picasso library to load images  Picasso with context  load R drawable landing screen  into imageView1   Picasso with context  load  quot file    android asset DvpvklR png quot   into imageView2   Picasso with context  load new File       into imageView3

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use this concept this will help you  After that set the imagebitmap on image view  public static Bitmap convertBitmap String path               Bitmap bitmap null          BitmapFactory Options bfOptions new BitmapFactory Options            bfOptions inDither false                        Disable Dithering mode         bfOptions inPurgeable true                      Tell to gc that whether it needs free memory  the Bitmap can be cleared         bfOptions inInputShareable true                 Which kind of reference will be used to recover the Bitmap data after being clear  when it will be used in the future         bfOptions inTempStorage new byte 32   1024              File file new File path           FileInputStream fs null          try               fs   new FileInputStream file             catch  FileNotFoundException e                e printStackTrace                       try               if fs  null                                bitmap BitmapFactory decodeFileDescriptor fs getFD    null  bfOptions                               catch  IOException e                 e printStackTrace              finally               if fs  null                    try                       fs close                      catch  IOException e                         e printStackTrace                                                       return bitmap          If you want to make a small image from large image with height and width like 60 and 60 and scroll the listview fast then use this concept  public static Bitmap decodeSampledBitmapFromPath String path  int reqWidth              int reqHeight             final BitmapFactory Options options   new BitmapFactory Options            options inJustDecodeBounds   true          BitmapFactory decodeFile path  options            options inSampleSize   calculateInSampleSize options  reqWidth                  reqHeight               Decode bitmap with inSampleSize set         options inJustDecodeBounds   false          Bitmap bmp   BitmapFactory decodeFile path  options           return bmp                 public static int calculateInSampleSize BitmapFactory Options options              int reqWidth  int reqHeight             final int height   options outHeight          final int width   options outWidth          int inSampleSize   1           if  height  gt  reqHeight    width  gt  reqWidth                if  width  gt  height                    inSampleSize   Math round  float  height    float  reqHeight                 else                   inSampleSize   Math round  float  width    float  reqWidth                                      return inSampleSize              I hope it will help you much   You can take help from developer site Here

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unfortunately if None of the Above works  then Add this to your Manifest file  Inside application tag    lt application          android largeHeap  true

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I had this same issue and solved it by avoiding the BitmapFactory decodeStream or decodeFile functions and instead used BitmapFactory decodeFileDescriptor  decodeFileDescriptor looks like it calls different native methods than the decodeStream decodeFile   Anyways  what worked was this  note that I added some options as some had above  but that s not what made the difference  What is critical is the call to BitmapFactory decodeFileDescriptor instead of decodeStream or decodeFile    private void showImage String path           Log i  showImage   loading   path       BitmapFactory Options bfOptions new BitmapFactory Options        bfOptions inDither false                        Disable Dithering mode     bfOptions inPurgeable true                      Tell to gc that whether it needs free memory  the Bitmap can be cleared     bfOptions inInputShareable true                 Which kind of reference will be used to recover the Bitmap data after being clear  when it will be used in the future     bfOptions inTempStorage new byte 32   1024         File file new File path       FileInputStream fs null      try           fs   new FileInputStream file         catch  FileNotFoundException e              TODO do something intelligent         e printStackTrace               try           if fs  null  bm BitmapFactory decodeFileDescriptor fs getFD    null  bfOptions         catch  IOException e              TODO do something intelligent         e printStackTrace          finally           if fs  null                try                   fs close                  catch  IOException e                       TODO Auto-generated catch block                 e printStackTrace                                        bm BitmapFactory decodeFile path  bfOptions   This one causes error  java lang OutOfMemoryError  bitmap size exceeds VM budget      im setImageBitmap bm         bm recycle        bm null                              I think there is a problem with the native function used in decodeStream decodeFile  I have confirmed that a different native method is called when using decodeFileDescriptor   Also what I ve read is  that Images  Bitmaps  are not allocated in a standard Java way but via native calls  the allocations are done outside of the virtual heap  but are counted against it

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I just ran into this issue a couple minutes ago  I solved it by doing a better job at managing my listview adapter  I thought it was an issue with the hundreds of 50x50px images I was using  turns out I was trying to inflate my custom view each time the row was being shown  Simply by testing to see if the row had been inflated I eliminated this error  and I am using hundreds of bitmaps  This is actually for a Spinner  but the base adapter works all the same for a ListView  This simple fix also greatly improved the performance of the adapter      Override public View getView final int position  View convertView  final ViewGroup parent         if convertView    null           LayoutInflater inflater    LayoutInflater  mContext getSystemService Context LAYOUT INFLATER SERVICE           convertView   inflater inflate R layout spinner row  null

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After looking through all the answers  I was surprised to see that no one mentioned the Glide API for handling images  Great library  and abstracts out all the complexity of bitmap management  You can load and resize images quickly with this library and a single line of code        Glide with this  load yourImageResource  into imageview     You can get the repository here  https   github com bumptech glide

[android] Strange out of memory issue while loading an image to a Bitmap object

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