admob: How to load AdRequest outside of UI Thread?
super.onCreate(savedInstanceState){

    mainLayout = new LinearLayout(this);
    mainLayout.setOrientation(LinearLayout.VERTICAL);
    adView = new AdView(this, AdSize.BANNER, "MY_ID");
    adView.setVisibility(AdView.VISIBLE);
    mainLayout.addView(adView);
    adView.loadAd(new AdRequest());
     //more codes below
    }