How to display AlertDialog in a Fragment?

Question

I want to display an alert dialog in my app. I am using fragments. I tried the below code to do this:

 AlertDialog ad = new AlertDialog.Builder(context)             .create();     ad.setCancelable(false);     ad.setTitle(title);     ad.setMessage(message);     ad.setButton(context.getString(R.string.ok_text), new DialogInterface.OnClickListener() {          public void onClick(DialogInterface dialog, int which) {             dialog.dismiss();         }     }); ad.show(); 

but it was crashing and the error in logcat was:

04-18 15:23:01.770: E/AndroidRuntime(9424): android.view.WindowManager$BadTokenException: Unable to add window -- token null is not for an application

From internet I came to know that the crash is due to context issue. I had given context as

context = this.getActivity().getApplicationContext(); 

I don't know what is the problem with this. Can anybody help me?

Answer 1

Replace context with getActivity().

The ApplicationContext should not be used for tasks such as creating Dialogs. As you are in a fragment you can instead get the Activity-Context simply by calling the Fragments getActivity() method.