How to read drawable bits as InputStream

Question

There\'s say some ImageView object. I want to read bits/raw data of this object as InputStream. How to do that?

Answer 1

You can use the drawing cache to retrieve a Bitmap representation of any View class.

view.setDrawingCacheEnabled(true);
Bitmap b = view.getDrawingCache();

Then you can write the bitmap to an OutputStream, for example:

b.compress(CompressFormat.JPEG, 80, new FileOutputStream("/view.jpg"));

In your case I think you can use a ByteArrayOutputStream to get a byte[] from which you can create an InputStream. The code would be something like this:

ByteArrayOutputStream os = new ByteArrayOutputStream(b.getByteCount());
b.compress(CompressFormat.JPEG, 80, os);
byte[] bytes = os.toByteArray();