Get Bitmap from ImageView in Android L

Question

I want to get Bitmap from ImageView. I have used following code, but getDrawable() returns null. How to get whole Bitmap from ImageView.

Bitmap bitmap;
if (mImageViewer.getDrawable() instanceof BitmapDrawable) {
    bitmap = ((BitmapDrawable) mImageViewer.getDrawable()).getBitmap();
} else {
    Drawable d = mImageViewer.getDrawable();
    bitmap = Bitmap.createBitmap(d.getIntrinsicWidth(), d.getIntrinsicHeight(), Bitmap.Config.ARGB_8888);
    Canvas canvas = new Canvas(bitmap);
    d.draw(canvas);
}
storeImage(bitmap,"final.jpeg");

Your code should work, make sure your image view has a drawable, if you're setting the image using setBackground use setBitmap instead — elmorabea, Nov 26 '14 at 11:42

score 38 · Answer 1 · answered Nov 20 '14 at 01:56

38

If you just want the Bitmap from a ImageView the following code may work for you:-

Bitmap bm=((BitmapDrawable)imageView.getDrawable()).getBitmap();

Try having the image in all drawable qualities folders (drawable-hdpi/drawable-ldpi etc.)

Could be that the emulator or device your using has a different density and is trying to pull images from another folder.

If you are using an extension in your image other than .png, .jpg, or .gif, It might not recognize other extension types. http://developer.android.com/guide/topics/resources/drawable-resource.html

answered Nov 20 '14 at 01:56

droidev

7,352
11
62
94

1

returns null ... everytime – Maveňツ Sep 27 '18 at 11:58
do you have images in the mentioned folders ? – droidev Sep 27 '18 at 11:59
only in drawable folder – Maveňツ Sep 27 '18 at 12:00
can you paste the same image in all the folders and try ? – droidev Sep 27 '18 at 12:01
still same pasted in all the folders – Maveňツ Sep 27 '18 at 12:07
what's getting null imageview or bitmap ? – droidev Sep 27 '18 at 12:37
i m gettng bitmap null – Maveňツ Oct 03 '18 at 07:47
@Maveňツ do onething, call this on post method of your image view – droidev Oct 03 '18 at 10:41

score 23 · Answer 2 · edited May 23 '17 at 12:34

23

According to this answer, just do it like this:

imageView.buildDrawingCache();
Bitmap bmap = imageView.getDrawingCache();

edited May 23 '17 at 12:34

Community

1
1

answered Nov 11 '14 at 13:21

ToYonos

16,469
2
54
70

2

this doesn't work perfectly all the time, usually give Canvas: trying to use recycled bitmap – Arsalan Saleem Feb 21 '15 at 08:08
This solution along with this answer(http://stackoverflow.com/questions/5566758/bitmap-from-textview-getdrawingcache-always-null) worked for me: imageView.measure(MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED), MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED)); imageView.layout(0, 0, imageView.getMeasuredWidth(), imageView.getMeasuredHeight()); – Roy Jun 01 '15 at 12:58
getDrawingCache() is depricated – Majid Sadeghi Sep 08 '20 at 10:54

score 12 · Answer 3 · answered Aug 25 '21 at 11:37

12

For Kotlin:

simply write this code to get the bitmap from an ImageView

imageview.invalidate()
val drawable = imageview.drawable
val bitmap = drawable.toBitmap()

answered Aug 25 '21 at 11:37

Ghayas

1,266
10
17

1

Thanks, this really helped. – King Of The Jungle Mar 30 '22 at 20:14

score 6 · Answer 4 · answered Sep 06 '16 at 13:04

6

If you are trying to get bitmap from Glide loaded image then this will help you

 Drawable dr = ((ImageView) imView).getDrawable();
        Bitmap bmp =  ((GlideBitmapDrawable)dr.getCurrent()).getBitmap();

answered Sep 06 '16 at 13:04

Ness Tyagi

2,008
24
18

score 1 · Answer 5 · edited Nov 07 '19 at 12:17

Take a picture of the ImagView and convert it to a string to send to the server

    ImageView   ivImage1 = (ImageView ) findViewById(R.id.img_add1_send );
    getStringImage( ( ( BitmapDrawable ) ivImage1.getDrawable( ) ).getBitmap( ) ),



public String getStringImage(Bitmap bm){
    ByteArrayOutputStream ba=new ByteArrayOutputStream(  );
    bm.compress( Bitmap.CompressFormat.PNG,90,ba );
    byte[] by=ba.toByteArray();
    String encod= Base64.encodeToString( by,Base64.DEFAULT );
    return encod;
}

Get Bitmap from ImageView in Android L

5 Answers5

Linked