title: How to change black background color of bitmap to transparent?
body: <p>I am creating <code>Bitmap</code> using following code:</p>
  
  <pre><code>Bitmap bm= Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
  </code></pre>
  
  <p>But I want to change <code>Background</code> color from <em>black</em> to <em>transparent</em> because I want to use this object in another <code>Activity</code> also. I searched a lot but I am unable to find solution.
  Please help.
  Thanks in advance.</p>