title: Transparent Google Map on PopupWindow?
body: <p>I have used a Google Maps (V2) in a <code>PopupWindow</code> and when I run the application, the map is not displayed. Even the area where it should be is fully transparent and I can see the activity below the <code>PopupWindow</code> through it.</p>
  
  <p>Any idea why this is?</p>
  
  <p><strong>Fragment inside popup_window.xml</strong></p>
  
  <pre><code>&lt;fragment
      android:id="@+id/popup_alert_map"
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:layout_below="@+id/popup_alert_description"
      android:layout_marginTop="10dp"
      class="com.google.android.gms.maps.SupportMapFragment" /&gt;
  </code></pre>
  
  <p><strong>And how I show it inside Popup.java</strong></p>
  
  <pre><code>SupportMapFragment supportMapFragment = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.popup_alert_map);
  locationMap = supportMapFragment.getMap();
  
  locationMap.setMyLocationEnabled(true);
  locationMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);
  </code></pre>
  
  <p>I have another <code>Activity</code> with a map it it and <em>that</em> displays nicely.</p>
  
  <p>Any help greatly appreciated...</p>