title: Saving PNG Drawable Android
body: <p>I know how to save an image with Bitmap.compress(), but I really want to save the image as a PNG with its alpha-transparency, and using Bitmap just kills my efforts. I can save it as a opaque PNG, but not as a transparent PNG file.</p>
  
  <p>Is there any approach to this?</p>
  
  <p>Thank you.</p>