title: How to add test device in Admob android
body: <p>I am trying to add AdMob into my project. I have added everything and the actual ad appears. I need to add the test ad's, but no joy.</p>
  
  <pre><code>AdView mAdView = (AdView) findViewById(R.id.adView);
          AdRequest adRequest = new AdRequest.Builder().build();
          mAdView.loadAd(adRequest);
  </code></pre>
  
  <p>How to I add the testDevice to this. I get the following in logcat. I am new. Pls help.</p>
  
  <pre><code>Use AdRequest.Builder.addTestDevice("C56DDF777176380265C737EAE019B2CB")
  </code></pre>