view.getDrawingCache() only works once

Question

I have a RelativeLayout with a loaded bitmap image using the Touch V2 example from Pragmatic Bookshelf -- http://media.pragprog.com/titles/eband3/code/Touchv2/src/org/exampl

Answer 1

To make it work more then once you have to use view.setDrawingCacheEnabled(true) each time before and view.setDrawingCacheEnabled(false) each time after calling view.getDrawingCache(). See the example:

imageView.setDrawingCacheEnabled(true);
imageView.buildDrawingCache(true);
File imageFile = new File(Environment.getExternalStorageDirectory(),
        "Pictures/image.jpg");
FileOutputStream fileOutputStream = new FileOutputStream(imageFile);
imageView.getDrawingCache(true).compress(CompressFormat.JPEG, 100,
        fileOutputStream);
fileOutputStream.close();
imageView.setDrawingCacheEnabled(false);