how do you pass images bitmaps between android activities using bundles

Question

Suppose I have an activity to select an image from the gallery  and retrieve it as a BitMap  just like the example  here  Now  I want to pass this BitMap to be used in an ImageView for another activity  I am aware bundles can be passed between activities  but how would I store this BitMap into the bundle   or is there another approach I should take

User · Answer

Write this code from where you want to Intent into next activity.

    yourimageView.setDrawingCacheEnabled(true); 
    Drawable drawable = ((ImageView)view).getDrawable(); 
    Bitmap bitmap = imageView.getDrawingCache();
    Intent intent = new Intent(getBaseContext(), NextActivity.class);
    intent.putExtra("Image", imageBitmap);

In onCreate Function of NextActivity.class

Bitmap hotel_image;
Intent intent = getIntent();
hotel_image= intent.getParcelableExtra("Image");

User · Answer

in first java  Intent i   new Intent this  second class                       i putExtra  uri  uri                       startActivity i     in second java  Bundle bd   getIntent   getExtras            Uri uri   bd getParcelable  uri            Log e  URI   uri toString             try               Bitmap bitmap   Media getBitmap this getContentResolver    uri               imageView setImageBitmap bitmap                       catch  FileNotFoundException e                e printStackTrace              catch  IOException e                e printStackTrace

User · Answer

I would highly recommend a different approach   It s possible if you REALLY want to do it  but it costs a lot of memory and is also slow  It might not work if you have an older phone and a big bitmap  You could just pass it as an extra  for example intent putExtra  data   bitmap   A Bitmap implements Parcelable  so you can put it in an extra  Likewise  a bundle has putParcelable   If you want to pass it inbetween activities  I would store it in a file  That s more efficient  and less work for you  You can create private files in your data folder using MODE PRIVATE that are not accessible to any other app

User · Answer

I had to rescale the bitmap a bit to not exceed the 1mb limit of the transaction binder  You can adapt the 400 the your screen or make it dinamic it s just meant to be an example  It works fine and the quality is nice  Its also a lot faster then saving the image and loading it after but you have the size limitation       public void loadNextActivity        Intent confirmBMP   new Intent this ConfirmBMPActivity class        ByteArrayOutputStream stream   new ByteArrayOutputStream        Bitmap bmp   returnScaledBMP        bmp compress Bitmap CompressFormat JPEG  100  stream        confirmBMP putExtra  Bitmap  bmp       startActivity confirmBMP       finish       public Bitmap returnScaledBMP        Bitmap bmp null      bmp   tempBitmap      bmp   createScaledBitmapKeepingAspectRatio bmp 400       return bmp       After you recover the bmp in your nextActivity with the following code   protected void onCreate Bundle savedInstanceState        super onCreate savedInstanceState       setContentView R layout activity confirmBMP       Intent intent   getIntent        Bitmap bitmap    Bitmap  intent getParcelableExtra  Bitmap         I hope my answer was somehow helpfull  Greetings

User · Answer

Bitmap is Parcelable so you can add using  putExtra String Parcelable   2  method  But not sure it is a best practice  If it is large size data it is better to store in a single place and use from both activities     2   http   developer android com reference android content Intent html putExtra java lang String  android os Parcelable

User · Answer

Activity  To pass a bitmap between Activites  Intent intent   new Intent this  Activity class   intent putExtra  bitmap   bitmap     And in the Activity class  Bitmap bitmap   getIntent   getParcelableExtra  bitmap        Fragment  To pass a bitmap between Fragments  SecondFragment fragment   new SecondFragment    Bundle bundle   new Bundle    bundle putParcelable  bitmap   bitmap   fragment setArguments bundle     To receive inside the SecondFragment  Bitmap bitmap   getArguments   getParcelable  bitmap        Transferring large bitmap  Compress bitmap   If you are getting failed binder transaction  this means you are exceeding the binder transaction buffer by transferring large element from one activity to another activity    So in that case you have to compress the bitmap as an byte s array and then uncompress it in another activity  like this  In the FirstActivity  Intent intent   new Intent this  SecondActivity class    ByteArrayOutputStream stream   new ByteArrayOutputStream    bitmap compress Bitmap CompressFormat JPG  100  stream   byte   bytes   stream toByteArray     intent putExtra  bitmapbytes  bytes     And in the SecondActivity  byte   bytes   getIntent   getByteArrayExtra  bitmapbytes    Bitmap bmp   BitmapFactory decodeByteArray bytes  0  bytes length

User · Answer

As suggested by  EboMike I saved the bitmap in a file named myImage in the internal storage of my application not accessible my other apps  Here s the code of that part   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   Bitmap bitmap   BitmapFactory decodeStream context                      openFileInput  myImage      here context can be anything like getActivity   for fragment  this or MainActivity this   Note A lot of checking for null and scaling bitmap s is ommited

User · Answer

If you pass it as a Parcelable  you re bound to get a JAVA BINDER FAILURE error   So  the solution is this   If the bitmap is small  like  say  a thumbnail  pass it as a byte array and build the bitmap for display in the next activity   For instance   in your calling activity     Intent i   new Intent this  NextActivity class   Bitmap b     your bitmap ByteArrayOutputStream bs   new ByteArrayOutputStream    b compress Bitmap CompressFormat PNG  50  bs   i putExtra  byteArray   bs toByteArray     startActivity i        and in your receiving activity  if getIntent   hasExtra  byteArray          ImageView previewThumbnail   new ImageView this       Bitmap b   BitmapFactory decodeByteArray          getIntent   getByteArrayExtra  byteArray   0 getIntent   getByteArrayExtra  byteArray   length               previewThumbnail setImageBitmap b

User · Answer

You can pass image in short without using bundle like this This is the code of sender  class file  Bitmap bitmap   BitmapFactory decodeResource getResources   R drawable ic launcher  Intent intent   new Intent    Intent setClass  lt Sender Activity gt  this   lt Receiver Activity class   Intent putExtra  Bitmap   bitmap   startActivity intent     and this is receiver class file code   Bitmap bitmap    Bitmap this getIntent   getParcelableExtra  Bitmap    ImageView viewBitmap    ImageView findViewById R id bitmapview   viewBitmap setImageBitmap bitmap     No need to compress  that s it

[android] how do you pass images (bitmaps) between android activities using bundles?

Examples related to android

Examples related to image

Examples related to bundle