title: setAlpha for RemoteViews problem
body: <p>I'm making an appwidget, and there's a bitmap on the widget of which I want to change it's transparency.</p>
  
  <p>In the service I have:</p>
  
  <pre><code>RemoteViews remoteView = new RemoteViews(getApplicationContext().getPackageName(), R.layout.myWidget);
  
  remoteView.setInt(R.id.widgetPNG, "setAlpha", 50);
  </code></pre>
  
  <p>But it doesn't work. The emulator shows "Problem loading widget" on the home screen.
  I'm pretty sure everything else is fine cos when i changed the line to change it's imageResource it runs perfectly: <code>remoteView.setInt(R.id.widgetPNG, "setImageResource", R.drawable.anotherPNG).</code></p>
  
  <p>Can anyone help me? I've been stuck with this for a week...</p>