title: Map is not displaying in phone only black screen
body: <p>The following errors i m getting when the Map app is running in phone. 
  I create both debug key and custom apiKey  using eclipse,</p>
  
  <p>Right click on project->Android tools->Export signed application package and then fill the form and then using keytool i got the MD5  and then apiKey.</p>
  
  <p>I also replace the debug apikey with custom apiKey. 
  How to sort out these errors? </p>
  
  <pre><code>11-01 17:00:08.238: ERROR/MapView(8971): IllegalStateException on drawMap. Wiping cache.
  11-01 17:00:08.238: ERROR/MapView(8971): java.lang.IllegalStateException: Null Bitmap! "loading_tile"; if seen during a test, this usually means that the image file needs to be added to the test.config file
  11-01 17:00:08.238: ERROR/MapView(8971):     at com.google.common.graphics.android.AndroidImage.&lt;init&gt;(Unknown Source)
  11-01 17:00:08.238: ERROR/MapView(8971):     at com.google.common.graphics.android.AndroidImageFactory.createImage(Unknown Source)
  11-01 17:00:08.238: ERROR/MapView(8971):     at com.google.googlenav.map.MapTile.createTempImages(Unknown Source)
  11-01 17:00:08.238: ERROR/MapView(8971):     at com.google.googlenav.map.MapTile.getTempImage(Unknown Source)
  11-01 17:00:08.238: ERROR/MapView(8971):     at com.google.googlenav.map.MapTile.getImage(Unknown Source)
  11-01 17:00:08.238: ERROR/MapView(8971):     at com.google.googlenav.map.Map.drawTile(Unknown Source)
  11-01 17:00:08.238: ERROR/MapView(8971):     at com.google.googlenav.map.Map.drawMapBackground(Unknown Source)
  11-01 17:00:08.238: ERROR/MapView(8971):     at com.google.googlenav.map.Map.drawMap(Unknown Source)
  11-01 17:00:08.238: ERROR/MapView(8971):     at com.google.android.maps.MapView.drawMap(MapView.java:1048)
  11-01 17:00:08.238: ERROR/MapView(8971):     at com.google.android.maps.MapView.onDraw(MapView.java:486)
  11-01 17:00:08.238: ERROR/MapView(8971):     at android.view.View.draw(View.java:6535)
  </code></pre>