Admob广告未显示并出现错误

Question

我想在我的Android应用中添加Admob广告，横幅广告没有显示，我收到此错误消息：

11-12 15:10:46.149: E/ActivityThread(16950): Failed to find provider info for com.google.plus.platform

这是我的代码：

adView = new AdView(StreamProductsActivity.this, AdSize.BANNER, "ca-app-pub-XXXXXXXXXXXX");
            AdRequest adRequest = new AdRequest();
            adView.loadAd(adRequest);
            listView.addHeaderView(adView);