title: widget icon sizes for mdpi hdpi xhdpi 2x2 4x4
body: <p>Hi I have to add the Icon which shows the widget description in the Widgets List
  There are a few questions</p>
  
  <pre><code>a) What is the size of the icon for 2x2 widget and 4x4 widget
  b) Do i have to create different icon for mdpi/hdpi/xhdpi 
  c) what is the difference between android:icon in reciever and android:previewImage (in xml)
  </code></pre>
  
  <p>Thanks</p>