AdView隐藏的Admob广告

Question

最近，我一直在尝试将admob添加到我的Google Play商店应用中。

我知道我的广告隐藏在WebView下，因为当我删除WebView代码时，我可以看到该广告。但是，当我替换WebView时，广告会再次隐藏。如何防止广告被隐藏？

以下是我的java代码：

public class MainActivity extends ActionBarActivity {

private android.webkit.WebView mWebview;
private Toast toast;
private long lastBackPressTime = 0L;
int dar = 0;
private ProgressDialog mDialog;
private Menu mymenu;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);


    final ProgressDialog pd = ProgressDialog.show(MainActivity.this, "", "U5N|tech, loading...", true);
    mWebview = (WebView) findViewById(R.id.webView);
    mWebview = new android.webkit.WebView(this);
    mWebview.getSettings().setJavaScriptEnabled(true);// enable javascript
    final Activity activity = this;
    mWebview.setWebViewClient(new WebViewClient() {
        public void onReceivedError(android.webkit.WebView view, int errorCode, String description, String failingUrl) {
            Toast.makeText(activity, description, Toast.LENGTH_SHORT).show();
        }



        @Override
        public void onPageStarted(WebView view, String url, Bitmap favicon) {
            pd.show();
        }

        @Override
        public void onPageFinished(WebView view, String url) {
            pd.dismiss();

            String webUrl = mWebview.getUrl();

        }

    });

    mWebview.loadUrl("http://yousif.u5n.co.uk/dictionaryapp");


    AdView mAdView = (AdView) findViewById(R.id.adView);
    AdRequest adRequest = new AdRequest.Builder().build();
    mAdView.loadAd(adRequest);

    // don't touch anything above this line

    setContentView(mWebview);

     //loads webpages in webview instead of launching browser

}