Android - YouTube AdSense does not render on an Android WebView

Android - YouTube AdSense does not render on an Android WebView

I have a WebView in Android, and most things render fine. My Youtube
videos render fine, but the ads on them do not show up. I checked and
JavaScript is enabled. So I am not sure why the ads do not render.
Here is the code that I use:
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
webview = new WebView(this);
setContentView(webview);
webview.getSettings().setAppCacheEnabled(false);
webview.getSettings().setJavaScriptEnabled(true);
webview.setInitialScale(1);
webview.getSettings().setPluginState(PluginState.ON);
WebSettings webSettings = webview.getSettings();
webSettings.setLoadsImagesAutomatically(true);
webSettings.setLoadWithOverviewMode(true);
webSettings.setBuiltInZoomControls(true);
webSettings.setUseWideViewPort(true);
webview.setWebViewClient(new WebViewClient() {
public boolean shouldOverrideUrlLoading(WebView view, String url) {
view.loadUrl(url);
return false;
}
});
webview.setWebChromeClient(new WebChromeClient(){});
webSettings.setJavaScriptEnabled(true);
webSettings.setDomStorageEnabled(true);
webSettings.setAppCacheEnabled(true);
webSettings.setAppCachePath(getApplicationContext().getFilesDir().getAbsolutePath()
+ "/cache");
webSettings.setDatabaseEnabled(true);
webSettings.setDatabasePath(getApplicationContext().getFilesDir().getAbsolutePath()
+ "/databases");
webview.loadUrl("http://javatester.org/javascript.html");
}
Would anyone know why the AdSense ads do not render, and how I can make it
render?
Thanks!