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 86 · Answer 1 · edited Aug 02 '18 at 09:30

86

Try this:

imageView.invalidate();
BitmapDrawable drawable = (BitmapDrawable) imageView.getDrawable();
Bitmap bitmap = drawable.getBitmap();

edited Aug 02 '18 at 09:30

Bipin Bharti

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answered Nov 20 '14 at 04:44

Pankaj Arora

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Could you explain why you invalidate first? Is there a good reason to do this? – Wolfgang Schreurs Sep 20 '18 at 12:54
2

@Tom If you are using Glide then try this one GlideBitmapDrawable drawable = (GlideBitmapDrawable) image.getDrawable(); – Umair Iqbal Nov 25 '19 at 16:01

score 33 · Answer 2 · answered Nov 20 '14 at 01:56

33

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

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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 20 · Answer 3 · edited May 23 '17 at 12:34

20

According to this answer, just do it like this:

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

edited May 23 '17 at 12:34

Community

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answered Nov 11 '14 at 13:21

ToYonos

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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 7 · Answer 4 · answered Aug 25 '21 at 11:37

7

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

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

score 6 · Answer 5 · answered Sep 06 '16 at 13:04

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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

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score 1 · Answer 6 · edited Nov 07 '19 at 12:17

1

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;
}

edited Nov 07 '19 at 12:17

madlymad

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answered Aug 22 '17 at 17:30

younes

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sorry out of topic. but how does server (php) receive this string...? is there any encoder steps required? – gumuruh May 29 '20 at 02:38

Get Bitmap from ImageView in Android L

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