Meu problema é que os anúncios não estão sendo exibidos no meu aplicativo, no modo de teste ou não. Vou manter essa pergunta específica para o modo de teste e, assim que começar a trabalhar, vou me preocupar com anúncios ao vivo.

Informações sobre desenvolvimento

Estou usando o Eclipse para desenvolvimento.

Eu configurei anúncios usando o Google Play Services e o Admob no meu aplicativo Android, conforme descrito na documentação on-line fornecida pelo Google.

Adicionei o ID do dispositivo usando addTestDevice ("xxxxxxxxxxxxxxxx") e verifiquei o ID do dispositivo com hash várias vezes para ter certeza de que está correto.

O problema (veja abaixo as informações do log)

Quando executo o aplicativo no meu dispositivo, nenhum anúncio é exibido. Isso acontece mesmo quando adicionei meu dispositivo como dispositivo de teste.

Pesquisei alto e baixo e encontrei muitos problemas semelhantes, mas ainda não encontrei uma resposta para esse problema específico.

Saída do LogCat

10-28 13:56:41.659: I/Ads(1704): Starting ad request.
10-28 13:56:42.187: I/Ads(1704): No fill from ad server.
10-28 13:56:42.187: W/Ads(1704): Failed to load ad: 3
10-28 13:56:42.199: W/Ads(1704): No GMSG handler found for GMSG: gmsg://mobileads.google.com/jsLoaded?google.afma.Notify_dt=1414504602197

Minha atividade

   package bb.hoppingbird;

    import org.cocos2d.layers.CCScene;
    import org.cocos2d.nodes.CCDirector;
    import org.cocos2d.opengl.CCGLSurfaceView;

    import com.google.android.gms.ads.AdListener;
    import com.google.android.gms.ads.AdRequest;
    import com.google.android.gms.ads.AdSize;
    import com.google.android.gms.ads.AdView;
    import com.google.android.gms.ads.InterstitialAd;

    import android.app.Activity;
    import android.content.SharedPreferences;
    import android.media.MediaPlayer;
    import android.os.Bundle;
    import android.support.v4.view.ViewPager.LayoutParams;
    import android.util.DisplayMetrics;
    import android.view.KeyEvent;
    import android.widget.RelativeLayout;
    import android.widget.Toast;

    public class MainActivity extends Activity {

    private CCGLSurfaceView mGLSurfaceView;

    //<!-- Admob Ads Using Google Play Services SDK -->
    private static final String AD_UNIT_ID = "ca-app-pub-xxxxxxxxxxxxxxxxxxxx";
    private static final String AD_INTERSTITIAL_UNIT_ID = "ca-app-pub-xxxxxxxxxxxxxxxxxxxx";


    /** The Admob ad. */
    private InterstitialAd interstitialAd = null;
    public AdView adView = null;

    public static MainActivity app;

    public void onCreate(Bundle savedInstanceState)
    {
        app = this;

        super.onCreate(savedInstanceState);

        // set view
        mGLSurfaceView = new CCGLSurfaceView(this);


        //Ads ----------------
        // Create the adView
        RelativeLayout layout = new RelativeLayout(this);
        layout.setLayoutParams(new RelativeLayout.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));

        //<!-- Ads Using Google Play Services SDK -->
        adView = new AdView(this);
        adView.setAdSize(AdSize.SMART_BANNER);
        adView.setAdUnitId(AD_UNIT_ID);

        // Add the adView to it
        RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(
                LayoutParams.WRAP_CONTENT,
                LayoutParams.WRAP_CONTENT);
        params.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM, RelativeLayout.TRUE);
        params.addRule(RelativeLayout.CENTER_HORIZONTAL, RelativeLayout.TRUE);

        adView.setLayoutParams(params);

        layout.addView(mGLSurfaceView);
        layout.addView(adView);

        setContentView(layout);
        //New AdRequest 
        AdRequest adRequest = new AdRequest.Builder()
        .addTestDevice(AdRequest.DEVICE_ID_EMULATOR)
        .addTestDevice("0D47C6944503F0284666D16BB79BF684")
        .build();

    // Start loading the ad in the background.
    adView.loadAd(adRequest);


        //-----------------------------------------------------Interstitial Add
        // Create an Interstitial ad.
        interstitialAd = new InterstitialAd(this);
        interstitialAd.setAdUnitId(AD_INTERSTITIAL_UNIT_ID);
        interstitialAd.setAdListener(new AdListener() {
              @Override
              public void onAdLoaded() {
                interstitialAd.show();
              }

              @Override
              public void onAdFailedToLoad(int errorCode) {
                  Toast.makeText(getApplicationContext(), "Interstitial Ads loading failed", Toast.LENGTH_SHORT).show();
              }
        });
         // Load the interstitial ad.
        //showInterstitialAds();

        //----------------------
        // set director
        CCDirector director = CCDirector.sharedDirector();
        director.attachInView(mGLSurfaceView);
        director.setAnimationInterval(1/60);

        // get display info
        DisplayMetrics displayMetrics = new DisplayMetrics();
        getWindowManager().getDefaultDisplay().getMetrics(displayMetrics);
        G.display_w = displayMetrics.widthPixels;
        G.display_h = displayMetrics.heightPixels;
        G.scale = Math.max(G.display_w/1280.0f, G.display_h/800.0f);
        G.width = G.display_w / G.scale;
        G.height = G.display_h / G.scale;

        // get data
        SharedPreferences sp = CCDirector.sharedDirector().getActivity().getSharedPreferences("GameInfo", 0);
        G.music = sp.getBoolean("music", true);
        G.sound = sp.getBoolean("sound", true);

        // create sound
        G.soundMenu = MediaPlayer.create(this, R.raw.menu);
        G.soundMenu.setLooping(true);
        G.soundGame = MediaPlayer.create(this, R.raw.game);
        G.soundGame.setLooping(true);
        G.soundCollide = MediaPlayer.create(this, R.raw.collide);
        G.soundJump = MediaPlayer.create(this, R.raw.jump);
        G.soundLongJump = MediaPlayer.create(this, R.raw.long_jump);
        G.soundSpeedDown = MediaPlayer.create(this, R.raw.speed_down);
        G.soundSpeedUp = MediaPlayer.create(this, R.raw.speed_up);
        G.soundDirection = MediaPlayer.create(this, R.raw.direction_sign);
        G.soundClick = MediaPlayer.create(this, R.raw.menu_click);
        G.soundCollect = MediaPlayer.create(this, R.raw.collect);
        G.bgSound = G.soundMenu;

        // show menu
        CCScene scene = CCScene.node();
        scene.addChild(new MenuLayer(true));
        director.runWithScene(scene);
    }  

    @Override
    public void onPause()
    {
        if (adView != null) {
              adView.pause();
            }

        super.onPause();
        G.bgSound.pause();
        CCDirector.sharedDirector().onPause();
    }

    @Override
    public void onResume()
    {
        super.onResume();

        if (adView != null) {
            adView.resume();
          }

        if( G.music ) G.bgSound.start();

        CCDirector.sharedDirector().onResume();
    }

    @Override
    public void onDestroy()
    {
        // Destroy the AdView.
        if (adView != null) {
          adView.destroy();
        }

        super.onDestroy();
        G.bgSound.pause();
        CCDirector.sharedDirector().end();
    }

    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event)
    {
        if( keyCode == KeyEvent.KEYCODE_BACK )
        {
            CCDirector.sharedDirector().onKeyDown(event);
            return true;
        }
        return super.onKeyDown(keyCode, event);
    }

    public void showInterstitialAds()
    {
        runOnUiThread(new Runnable() {
            public void run() {
                 AdRequest interstitialAdRequest = new AdRequest.Builder().build();
                 interstitialAd.loadAd(interstitialAdRequest);
            }
        });
    }
}