title: How to erase the drawing on image
body: <p>I am trying to draw on image in android. I found one good example from <a href="http://code.tutsplus.com/tutorials/android-sdk-create-a-drawing-app-essential-functionality--mobile-19328" rel="nofollow">here</a>.
  Here they explained how to draw in the plain canvas. I tried to add image in that canvas.</p>
  
  <pre><code>canvasBitmap = BitmapFactory.decodeResource(res, R.drawable.image)
                  .copy(Bitmap.Config.ARGB_8888, true);
  canvasBitmap = Bitmap.createScaledBitmap(canvasBitmap, this.getWidth(),
                  this.getHeight(), true);
  </code></pre>
  
  <p>Now I am facing one issue. When I try to erase the drawings it erase the original image also. </p>
  
  <p>I tried lots of solution. But nothing helps me. Please let me know how to erase the drawings in the image without erase the Image.</p>