title: Activity has leaked window at alertDialog show() method
body: <p>I am getting window leak error at runtime because of using an AlertDialog.</p>
  
  <p>I have pointed out the error line in the code below:</p>
  
  <p><strong>Stacktrace:</strong></p>
  
  <pre><code>08-18 02:48:04.489  28893-28893/? E/WindowManager﹕ Activity com.ms.ha.fragment.FirstActivity has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView{52e58540 V.E..... R.....ID 0,0-1026,585} that was originally added here
      android.view.WindowLeaked: Activity com.ms.ha.fragment.FirstActivity has leaked window com.android.internal.policy.impl.PhoneWindow$DecorView{52e58540 V.E..... R.....ID 0,0-1026,585} that was originally added here
              at android.view.ViewRootImpl.&lt;init&gt;(ViewRootImpl.java:345)
              at android.view.WindowManagerGlobal.addView(WindowManagerGlobal.java:239)
              at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:69)
              at android.app.Dialog.show(Dialog.java:281)
              at com.ms.ha.fragment.TourGuideLoadURLFragment$WebAppInterface.moveToNextScreen(TourGuideLoadURLFragment.java:116)
              at android.webkit.WebViewCore.nativeMouseClick(Native Method)
              at android.webkit.WebViewCore.nativeMouseClick(Native Method)
              at android.webkit.WebViewCore.access$6800(WebViewCore.java:59)
              at android.webkit.WebViewCore$EventHub.dispatchWebKitEvent(WebViewCore.java:1793)
              at android.webkit.WebViewInputDispatcher.dispatchWebKitEvent(WebViewInputDispatcher.java:689)
              at android.webkit.WebViewInputDispatcher.dispatchWebKitEvents(WebViewInputDispatcher.java:639)
              at android.webkit.WebViewInputDispatcher.access$800(WebViewInputDispatcher.java:78)
              at android.webkit.WebViewInputDispatcher$WebKitHandler.handleMessage(WebViewInputDispatcher.java:1153)
              at android.os.Handler.dispatchMessage(Handler.java:99)
              at android.os.Looper.loop(Looper.java:137)
              at android.webkit.WebViewCore$WebCoreThread.run(WebViewCore.java:814)
              at java.lang.Thread.run(Thread.java:841)
  </code></pre>
  
  <p><strong>FirstActivity.java:</strong></p>
  
  <pre><code> public class FirstActivity extends FragmentActivity  implements View.OnClickListener{
  
   @Override
      protected void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          requestWindowFeature(Window.FEATURE_NO_TITLE);
          setContentView(R.layout.fragment_tour_guide_web);
    .......
    .......
  
     webView.addJavascriptInterface(new WebAppInterface(this), "Android");
  
   }
  
  
      public class WebAppInterface {
          Context mContext;
  
          /**
           * Instantiate the interface and set the context
           */
          WebAppInterface(Context c) {
              mContext = c;
          }
  
          /**
           * Intent - Move to next screen
           */
  
          @JavascriptInterface
          public void moveToNextScreen() {
              AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(
                      context);
  
              // set title
              alertDialogBuilder.setTitle("Your Title");
  
              // set dialog message
              alertDialogBuilder
                      .setMessage("Click yes!")
                      .setCancelable(false)
                      .setPositiveButton("Yes", new DialogInterface.OnClickListener() {
                          public void onClick(DialogInterface dialog, int id) {
  
                              Intent i = new Intent(FirstActivity.this,SecondActivity.class);
                              startActivity(i);
                          }
                      })
                      .setNegativeButton("No", new DialogInterface.OnClickListener() {
                          public void onClick(DialogInterface dialog, int id) {
                              // if this button is clicked, just close
                              // the dialog box and do nothing
                              dialog.cancel();
                          }
                      });
  
              // create alert dialog
              AlertDialog alertDialog = alertDialogBuilder.create();
  
              // show it
              alertDialog.show();  ---&gt;leak window error
  
          }
  
      }
  
    }
  </code></pre>
  
  <p>I don't know how to solve this issue. </p>