获取Bitmap附加到ImageView

Question

特定

ImageView image = R.findViewById(R.id.imageView);
image.setImageBitmap(someBitmap);

是否可以检索位图？

Answer 1

Bitmap bitmap = ((BitmapDrawable)image.getDrawable()).getBitmap();

Answer 2

这将让你Bitmap从ImageView.但是,它与您设置的位图对象不同.这是一个新的.

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

===编辑===

 imageView.setDrawingCacheEnabled(true);
 imageView.measure(MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED), 
                   MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED));
 imageView.layout(0, 0, 
                  imageView.getMeasuredWidth(), imageView.getMeasuredHeight()); 
 imageView.buildDrawingCache(true);
 Bitmap bitmap = Bitmap.createBitmap(imageView.getDrawingCache());
 imageView.setDrawingCacheEnabled(false);