How can I pass a Bitmap object from one activity to another

Question

In my activity  I create a Bitmap object and then I need to launch another Activity  How can I pass this Bitmap object from the sub-activity  the one which is going to be launched

User · Answer

Passsing bitmap as parceable in bundle between activity is not a good idea because of size limitation of Parceable(1mb). You can store the bitmap in a file in internal storage and retrieve the stored bitmap in several activities. Here's some sample code.

To store bitmap in a file myImage in internal storage:

public String createImageFromBitmap(Bitmap bitmap) {
    String fileName = "myImage";//no .png or .jpg needed
    try {
        ByteArrayOutputStream bytes = new ByteArrayOutputStream();
        bitmap.compress(Bitmap.CompressFormat.JPEG, 100, bytes);
        FileOutputStream fo = openFileOutput(fileName, Context.MODE_PRIVATE);
        fo.write(bytes.toByteArray());
        // remember close file output
        fo.close();
    } catch (Exception e) {
        e.printStackTrace();
        fileName = null;
    }
    return fileName;
}

Then in the next activity you can decode this file myImage to a bitmap using following code:

//here context can be anything like getActivity() for fragment, this or MainActivity.this
Bitmap bitmap = BitmapFactory.decodeStream(context.openFileInput("myImage"));

Note A lot of checking for null and scaling bitmap's is ommited.

User · Answer

Bitmap implements Parcelable  so you could always pass it with the intent   Intent intent   new Intent this  NewActivity class   intent putExtra  BitmapImage   bitmap     and retrieve it on the other end   Intent intent   getIntent     Bitmap bitmap    Bitmap  intent getParcelableExtra  BitmapImage

User · Answer

It might be late but can help  On the first fragment or activity do declare a class   for example      Override     public void onActivityResult int requestCode  int resultCode  Intent data            super onActivityResult requestCode  resultCode  data           description des   new description             if  requestCode    PICK IMAGE REQUEST  amp  amp  data    null  amp  amp  data getData      null                filePath   data getData                try                   bitmap   MediaStore Images Media getBitmap getActivity   getContentResolver    filePath                   imageView setImageBitmap bitmap                   ByteArrayOutputStream stream   new ByteArrayOutputStream                    bitmap compress Bitmap CompressFormat PNG  100  stream                   constan photoMap   bitmap                catch  IOException e                    e printStackTrace                                  public static class constan       public static Bitmap photoMap   null      public static String namePass   null      Then on the second class fragment do this    Bitmap bm   postFragment constan photoMap  final String itemName   postFragment constan namePass    Hope it helps

User · Answer

If the image is too large and you can t save amp load it to the storage  you should consider just using a global static reference to the bitmap  inside the receiving activity   which will be reset to null on onDestory  only if  isChangingConfigurations  returns true

User · Answer

Compress and Send Bitmap  The accepted answer will crash when the Bitmap is too large  I believe it s a 1MB limit  The Bitmap must be compressed into a different file format such as a JPG represented by a ByteArray  then it can be safely passed via an Intent   Implementation  The function is contained in a separate thread using Kotlin Coroutines because the Bitmap compression is chained after the Bitmap is created from an url String  The Bitmap creation requires a separate thread in order to avoid Application Not Responding  ANR  errors   Concepts Used   Kotlin Coroutines notes  The Loading  Content  Error  LCE  pattern is used below  If interested you can learn more about it in this talk and video  LiveData is used to return the data  I ve compiled my favorite LiveData resource in these notes  In Step 3  toBitmap   is a Kotlin extension function requiring that library to be added to the app dependencies    Code  1  Compress Bitmap to JPG ByteArray after it has been created   Repository kt  suspend fun bitmapToByteArray url  String    withContext Dispatchers IO        MutableLiveData lt Lce lt ContentResult ContentBitmap gt  gt    apply           postValue Lce Loading            postValue Lce Content ContentResult ContentBitmap              ByteArrayOutputStream   apply                   try                                            BitmapFactory decodeStream URL url  openConnection   apply                           doInput   true                         connect                         getInputStream                      catch  e  IOException                       postValue Lce Error ContentResult ContentBitmap ByteArray 0    bitmapToByteArray error or null -   e localizedMessage                         null                    compress CompressFormat JPEG  BITMAP COMPRESSION QUALITY  this               toByteArray                            ViewModel kt    Calls bitmapToByteArray from the Repository private fun bitmapToByteArray url  String    liveData       emitSource switchMap repository bitmapToByteArray url     lce - gt          when  lce                is Lce Loading - gt  liveData                is Lce Content - gt  liveData                   emit Event ContentResult ContentBitmap lce packet image  lce packet errorMessage                              is Lce Error - gt  liveData                   Crashlytics log Log WARN  LOG TAG                           bitmapToByteArray error or null -   lce packet errorMessage                                       2  Pass image as ByteArray via an Intent   In this sample it s passed from a Fragment to a Service  It s the same concept if being shared between two Activities   Fragment kt  ContextCompat startForegroundService      context        Intent context  AudioService  class java  apply           action   CONTENT SELECTED ACTION         putExtra CONTENT SELECTED BITMAP KEY  contentPlayer image           3  Convert ByteArray back to Bitmap   Utils kt  fun ByteArray byteArrayToBitmap context  Context        run           BitmapFactory decodeByteArray this  BITMAP OFFSET  size  run               if  this    null  this                In case the Bitmap loaded was empty or there is an error I have a default Bitmap to return              else AppCompatResources getDrawable context  ic coinverse 48dp   toBitmap

User · Answer

Actually  passing a bitmap as a Parcelable will result in a  JAVA BINDER FAILURE  error   Try passing the bitmap as a byte array and building it for display in the next activity   I shared my solution here  how do you pass images  bitmaps  between android activities using bundles

User · Answer

You can create a bitmap transfer  try this      In the first class   1  Create   private static Bitmap bitmap transfer    2  Create getter and setter  public static Bitmap getBitmap transfer         return bitmap transfer     public static void setBitmap transfer Bitmap bitmap transfer param        bitmap transfer   bitmap transfer param      3  Set the image   ImageView image    ImageView  view findViewById R id image   image buildDrawingCache    setBitmap transfer image getDrawingCache       Then  in the second class   ImageView image2    ImageView  view findViewById R id img2   imagem2 setImageDrawable new BitmapDrawable getResources    classe1 getBitmap transfer

User · Answer

In my case  the way mentioned above didn t worked for me  Every time I put the bitmap in the intent  the 2nd activity didn t start  The same happened when I passed the bitmap as byte      I followed this link and it worked like a charme and very fast   package your packagename  import android graphics Bitmap   public class CommonResources          public static Bitmap photoFinishBitmap   null      in my 1st acitiviy   Constants photoFinishBitmap   photoFinishBitmap  Intent intent   new Intent mContext  ImageViewerActivity class   startActivity intent     and here is the onCreate   of my 2nd Activity    Override public void onCreate Bundle savedInstanceState        super onCreate savedInstanceState       Bitmap photo   Constants photoFinishBitmap      if  photo    null            mViewHolder imageViewerImage setImageDrawable new BitmapDrawable getResources    photo

User · Answer

All of the above solutions doesn t work for me  Sending bitmap as parceableByteArray also generates error android os TransactionTooLargeException  data parcel size   Solution   Saved the bitmap in internal storage as    public String saveBitmap Bitmap bitmap            String fileName    ImageName    no  png or  jpg needed         try               ByteArrayOutputStream bytes   new ByteArrayOutputStream                bitmap compress Bitmap CompressFormat JPEG  100  bytes               FileOutputStream fo   openFileOutput fileName  Context MODE PRIVATE               fo write bytes toByteArray                    remember close file output             fo close              catch  Exception e                e printStackTrace                fileName   null                    return fileName           and send in putExtra String  as   Intent intent   new Intent ActivitySketcher this ActivityEditor class   intent putExtra  KEY   saveBitmap bmp    startActivity intent      and Receive it in other activity as    if getIntent      null     try              src   BitmapFactory decodeStream openFileInput  myImage              catch  FileNotFoundException e                e printStackTrace

User · Answer

Because Intent has size limit   I use public static object to do pass bitmap from service to broadcast       public class ImageBox       public static Queue lt Bitmap gt  mQ   new LinkedBlockingQueue lt Bitmap gt          pass in my service   private void downloadFile final String url           mExecutorService submit new Runnable                  Override             public void run                     Bitmap b   BitmapFromURL getBitmapFromURL url                   synchronized  this                       TaskCount--                                    Intent i   new Intent ACTION ON GET IMAGE                   ImageBox mQ offer b                   sendBroadcast i                   if TaskCount lt  0 stopSelf                                      My BroadcastReceiver  private final BroadcastReceiver mReceiver   new BroadcastReceiver             public void onReceive Context context  Intent intent                LOG d TAG   BroadcastReceiver get broadcast                 String action   intent getAction                if  DownLoadImageService ACTION ON GET IMAGE equals action                     Bitmap b   ImageBox mQ poll                    if b  null return                  if mListener  null mListener OnGetImage b

[java] How can I pass a Bitmap object from one activity to another

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