Question

I am using the following code

class AddTask extends AsyncTask<Void, Void, Void>
     {      
        ProgressDialog dialog;
    protected void onPreExecute() 
    {      
     dialog = new ProgressDialog(getApplicationContext());         
    dialog.setMessage("Loading"); 
    dialog.setIndeterminate(true);         
    dialog.setCancelable(false);      
    dialog.show();

      }     
     protected Void doInBackground(Void... unused) 
    {     

//task
return(null);  


    }     

      protected void onPostExecute(Void unused)
     {     
        dialog.dismiss();    
     }  

     }

I am calling it from here

public void onCreate(Bundle savedInstanceState) 
    {
        super.onCreate(savedInstanceState);
        new AddTask.execute();
}

Logcat

03-29 18:16:06.434: E/AndroidRuntime(1246): Caused by: android.view.WindowManager$BadTokenException: Unable to add window — token null is not for an application

Answer 1

i think you got exception due to this line

 dialog = new ProgressDialog(getApplicationContext());   

plz use this instead of getApplicationContext() or you can also use YourActivity.this for solve this issue.