Question

I have an image from the web in an ImageView. It is very small (a favicon) and I’d like to store it in my SQLite database.
I can get a Drawable from mImageView.getDrawable() but then I don’t know what to do next. I don’t fully understand the Drawable class in Android.

I know I can get a byte array from a Bitmap like:

Bitmap defaultIcon = BitmapFactory.decodeStream(in);

ByteArrayOutputStream stream = new ByteArrayOutputStream();
defaultIcon.compress(Bitmap.CompressFormat.JPEG, 100, stream);

byte[] bitmapdata = stream.toByteArray();

But how do I get a byte array from a Drawable?

Answer 1

Drawable d; // the drawable (Captain Obvious, to the rescue!!!)
Bitmap bitmap = ((BitmapDrawable)d).getBitmap();
ByteArrayOutputStream stream = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, stream);
byte[] bitmapdata = stream.toByteArray();