LibGDX and Admob: I don't see the ads

LibGDX and Admob: I don't see the ads

I tried everything, the code works without errors but i don't see my ads.
On my admob account there is no request also...
Here is my code
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
View gameView = initializeForView(new com.me.game.App(), false);
AdView adView = createAdView();
RelativeLayout layout = new RelativeLayout(this);
RelativeLayout.LayoutParams adParams =
new
RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT,
RelativeLayout.LayoutParams.WRAP_CONTENT);
adParams.addRule(RelativeLayout.ALIGN_BASELINE);
LayoutParams layoutParams = new LayoutParams(LayoutParams.FILL_PARENT,
LayoutParams.WRAP_CONTENT);
layout.addView(adView, adParams);
layout.addView(gameView, layoutParams);
setContentView(layout);
startAdvertising(adView);
}
private AdView createAdView() {
AdView adView = new AdView(this, AdSize.SMART_BANNER,"PUBLISHER_ID");
return adView;
}
private void startAdvertising(AdView adView) {
AdRequest adRequest = new AdRequest();
adRequest.addTestDevice("A0FA8C8161016266010B4E4239CD92D5"); // My Test
Device
adView.loadAd(adRequest);
}
}