title: Publisher ID vs. MY_AD_UNIT_ID, AdMob, Android
body: <p>i am confused.</p>
  
  <ol>
  <li>I created my AdMob account, with Publisher Id: pub-2fffdddcccyyyxxx</li>
  <li>I didn't add my app to AdMob yet, I would only test how it works</li>
  <li>I have been follow: <a href="https://developers.google.com/mobile-ads-sdk/docs/admob/fundamentals?hl=en#android" rel="nofollow">https://developers.google.com/mobile-ads-sdk/docs/admob/fundamentals?hl=en#android</a></li>
  </ol>
  
  <p><strong>I added:</strong>  </p>
  
  <pre><code>  AdRequest adRequest = new AdRequest();
      adRequest.addTestDevice(AdRequest.TEST_EMULATOR);  
      adRequest.addTestDevice("F08D35F3334039343254AD3A83ED11B5");  
       adView.loadAd(adRequest);
  </code></pre>
  
  <ol>
  <li>Now, I really don't know what is MY_AD_UNIT_ID from <a href="https://developers.google.com/mobile-ads-sdk/docs/admob/fundamentals?hl=en#android" rel="nofollow">https://developers.google.com/mobile-ads-sdk/docs/admob/fundamentals?hl=en#android</a> Publisher Id or "market://details?id=com.your.packagename"?</li>
  <li>I tried two ways: "pub-2fffdddcccyyyxxx" from AdMob and "market://details?id=com.your.packagename"</li>
  <li>I always get the answer:
  Invalid unknown request error: Cannot determine request type. Is your ad unit id correct?
  D/webviewglue(16784): nativeDestroy view: 0x4d98e8 onFailedToReceiveAd(Invalid Ad request.)</li>
  </ol>
  
  <p>What am I doing wrong? Do you have any idea?</p>
  
  <p>Thanks for help!</p>