title: Creating a translucent "dialog activity"
body: <p>I have a dialog-style activity that appears over my main activity in an Android application. How can I get the background to be translucent? Not transparent, but translucent - say 70% opaque. I've tried applying this theme to the activity:</p>
  
  <pre><code>    &lt;style name="Theme.Transparent" parent="android:Theme"&gt;
      &lt;item name="android:windowIsTranslucent"&gt;true&lt;/item&gt;
      &lt;item name="android:windowBackground"&gt;@android:color/transparent&lt;/item&gt;
  &lt;item name="android:windowContentOverlay"&gt;@null&lt;/item&gt;
      &lt;item name="android:windowNoTitle"&gt;true&lt;/item&gt;
      &lt;item name="android:windowIsFloating"&gt;true&lt;/item&gt;
      &lt;item name="android:backgroundDimEnabled"&gt;false&lt;/item&gt;
        &lt;/style&gt;  
  </code></pre>
  
  <p>and several variations on this but still the dialog activity appears 100% opaque. Also, the layout xml of the activity itself (and elements displayed on it), specify a background of "#70000000". </p>