Cancelling progressdialog and asynctask

Question

I am displaying a cancelable progress dialog while an asynctask is running. When I press the back button, I want both the dialog to disappear, but also to cancel the running async task. The problem is: The dialog-instance is not known to the asynctask, so I cant't cancel the dialog after the asynctask has been cancelled.

Currently it is only cancelled after I pushed the back button twice.

Answer 1

Dialog boxes have an onDismissed callback, use that to kill of the async task.

Answer 2

You can use ProgressDialog callback on cancel:

this.dialog = new ProgressDialog(context);
this.dialog.setMessage("Loading...");
this.dialog.setCancelable(true);
this.dialog.setOnCancelListener(new DialogInterface.OnCancelListener()
{
    @Override
    public void onCancel(DialogInterface dialog)
    {
        // cancel AsyncTask
        cancel(false);
    }
});