title: Why does AdMob return NO FILL
body: <p>I'm using an AdMob view in an android app, but I'm unable to get any ad into the app.</p>
  
  <p>For reference, I've added the view to a ListView as explained by Dan Dyer <a href="http://blog.uncommons.org/2011/05/09/embedding-admob-adverts-in-android-listviews/" rel="noreferrer">here</a></p>
  
  <p>EDIT:
  I'm using GoogleAdMobAdsSdk-4.1.1. The release notes of Google AdMob Ads SDK for version 4.1.0 says:</p>
  
  <p>"...
  - Added support for AdRequest.addTestDevice() and AdRequest.setTestDevices(). Note that AdRequest.setTesting() is now deprecated.
  ..."</p>
  
  <p>This is how the ad is inserted to my ListView:</p>
  
  <pre><code>public View getView(int position, View convertView, ViewGroup parent) {
  
    // Some other code
    // Reusing convertView etc.
  
    AdView adView = 
       new AdView((Activity) getContext(), AdSize.BANNER, 
       "/xxxxxx/ca-pub-xxxxxxx/my_ad_unit");
    for (int i = 0; i &lt; adView.getChildCount(); i++) {
      adView.getChildAt(i).setFocusable(false);
    }
    adView.setFocusable(false);
    float density = getContext().getResources().getDisplayMetrics().density;
    int height = Math.round(50 * density);
    AbsListView.LayoutParams params = new AbsListView.LayoutParams(
      AbsListView.LayoutParams.FILL_PARENT, height);
  
    adView.setLayoutParams(params);
    AdRequest request = new AdRequest();
    request.addTestDevice("xxxxxxxxxxxxxxxxx");
    adView.loadAd(request);
  
    // other stuff
    // returning convertView
  }
  </code></pre>
  
  <p>I've also added an AdListener to the adview, and on every loadAd, the onFailedToReceiveAd callback method is called:</p>
  
  <pre><code>public void onFailedToReceiveAd(Ad arg0, ErrorCode arg1) {
    Log.d(TAG, "AdMob in list failed to receive ad: " + arg1.name());
  }
  </code></pre>
  
  <p>In logcat I get this message:</p>
  
  <pre><code>08-17 15:22:18.065: AdMob in list failed to receive ad: NO_FILL
  </code></pre>
  
  <p>Can anyone tell me what this errorcode means?</p>