title: ImageButton in Android with transparent background
body: <p>I have follow this post to make ImageButton in android </p>
  
  <p><a href="https://stackoverflow.com/questions/2283444/android-image-button">android image button</a></p>
  
  <p>The image appears to the button but it has some background , my Image is a png image and I want the button to be transparent background</p>
  
  <p>any one help please</p>