NinePatchDrawable cannot be cast to android.graphics.drawable.BitmapDrawable

Question

I use a nine patch drawable in imageview and using below code I want to get Bitmap but this error happens.

 Bitmap stickerBitmap = ((BitmapDrawable) Front.getDrawable()).getBitmap();

Answer 1

You cannot directly cast a NinePatchDrawable to a BitmapDrawable, since those are two different incompatible drawable types.

If you want to get a Bitmap from a non-BitmapDrawable you have to draw it with a Canvas onto a Bitmap:

Drawable drawable = Front.getDrawable();
Bitmap stickerBitmap = Bitmap.createBitmap(Front.getWidth(),
        Front.getHeight(), Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(stickerBitmap);
drawable.setBounds(0, 0, canvas.getWidth(), canvas.getHeight());
drawable.draw(canvas);

Note that your ImageView has to be layouted so that it has a non-zero size.