Making a button semi-transparent in android
<blockquote>
  <p><strong>Possible Duplicate:</strong><br>
  <a href="http://stackoverflow.com/questions/2838757/how-to-set-opacity-alpha-for-view-in-android">How to Set Opacity (Alpha) for View in Android</a>  </p>
</blockquote>



<p>i want to ask two questions:</p>

<p>1) i want to make the buttons in my main.xml i.e simply the first screen look semi-transparent.
It should be such that the background image can be partly-seen through it. But the button should maintain its normal size and looks. </p>

<p>2)(This is regarding to another button in another view) i changed the background of buttons using-Button
      android:background="#2563EA"
   but now when it is clicked it does not change its color. how can i reset it. also can anyone tell me how to give it a new on click color.</p>
