Get Bitmap in imageview

imageView.getBackground(), is to get its background image;

When calling getDrawingCache, pay attention to the following two points:

1. Before calling the getDrawingCache() method to get the image from the ImageView object, be sure to call the setDrawingCacheEnabled(true) method:

   imageview.setDrawingCacheEnabled(true);

   Otherwise, the image cannot be obtained from the ImageView object iv_photo;

2. After calling the getDrawingCache() method to get the image from the ImageView object, be sure to call the setDrawingCacheEnabled(false) method:

   imageview.setDrawingCacheEnabled(false);

   To clear the drawing buffer, otherwise, the next image obtained from the ImageView object iv_photo is the original image.

3. mImageView.setDrawingCacheEnabled(true);
   Bitmap bitmap = Bitmap.createBitmap(mImageView.getDrawingCache());
   mImageView.setDrawingCacheEnabled(false);