Question

I press login button to login into my app and
I’m using asyncTask for this process. when I press the cancel button, it should stop the login process but what happens is when I press the cancel button the dialog box goes but login process doesn’t stop and evemtually the user is logged in :).

I used asyncTaskObject.cancel(true) to stop the process but nothing happens. How can I correct this.

Answer 1

The AsyncTask document states that the method cancel():

Attempts to cancel execution of this task. This attempt will fail if
the task has already completed, already been cancelled, or could not
be cancelled for some other reason.

The solution is also provided in the documentation which says:

Calling this method will result in onCancelled(Object) being invoked
on the UI thread after doInBackground(Object[]) returns. Calling this
method guarantees that onPostExecute(Object) is never invoked. After
invoking this method, you should check the value returned by
isCancelled() periodically from doInBackground(Object[]) to finish the
task as early as possible.

Check this link:

http://developer.android.com/reference/android/os/AsyncTask.html#cancel(boolean)