private final void clean() {
   if (null != mBrowser) {
     mBrowser.clean();
   }
   if (null != mScreen) {
     mScreen.removeAllViews();
   }
   WidgetOneApplication app = (WidgetOneApplication) getApplication();
   app.exitApp();
   mEHandler.clean();
   mBrowserAround.clean();
   mFinish = true;
   Runtime.getRuntime().gc();
 }