我的 Admob 广告没有绘图，但有吗?(LibGDX Admob 6.4.1)

I am using LibGDX 0.9.9 and Admob 6.4.1. I set up banner ads to appear in the top right corner of my app. However when I load up my app I can't see the banner. Although when I press where the banner should be it acts like normal and starts to appear. This happens both in testing mode and real mode. Here is my code:

    public class MainActivity extends AndroidApplication {
    private AdView adView;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        AndroidApplicationConfiguration cfg = new AndroidApplicationConfiguration();
        cfg.useGL20 = false;
        cfg.useAccelerometer = false;
        cfg.useCompass = false;

        RelativeLayout layout = new RelativeLayout(this);
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
        getWindow().clearFlags(WindowManager.LayoutParams.FLAG_FORCE_NOT_FULLSCREEN);

        // Create the libgdx View
        View gameView = initializeForView(new Game(), false);

        // Create and setup the AdMob view
        adView = new AdView(this);
        adView.setAdUnitId("SECRET ID");
        adView.setAdSize(AdSize.BANNER);

        AdRequest adRequest = new AdRequest.Builder()
        .addTestDevice(AdRequest.DEVICE_ID_EMULATOR)       // Emulator
        .addTestDevice("MY DEVICE ID") // My  Nexus test
        .build();

        adView.loadAd(adRequest);

        layout.addView(gameView);

        // Add the AdMob view
        RelativeLayout.LayoutParams adParams = new RelativeLayout.LayoutParams(
                RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
        adParams.addRule(RelativeLayout.ALIGN_PARENT_TOP);
        adParams.addRule(RelativeLayout.ALIGN_PARENT_RIGHT);

        layout.addView(adView, adParams);

        setContentView(layout);
    }

    public void onDestroy() { 
        if (adView != null) { 
            adView.destroy();
        }

        super.onDestroy();
    }

和 Android 清单:

    <?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.keep.hopping"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk android:minSdkVersion="10" android:targetSdkVersion="19" />

    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
    <uses-permission android:name="android.permission.INTERNET"/>
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>

    <application
        android:icon="@drawable/jumper"
        android:label="Keep Hopping" >
        <meta-data android:name="com.google.android.gms.version"
               android:value="@integer/google_play_services_version"/>
        <activity
            android:name="com.keep.hopping.MainActivity"
            android:label="Keep Hopping"
            android:screenOrientation="landscape"
            android:configChanges="keyboard|keyboardHidden|orientation|screenSize">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
         <activity android:name="com.google.android.gms.ads.AdActivity"
             android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|uiMode|screenSize|smallestScreenSize"/>
    </application>

</manifest>

...
layout.addView(adView, adParams);
adView.setBackgroundColor(getResources().getColor(android.R.color.transparent));
...