I am running remote audio-file-fetching and audio file playback operations in a background thread using AsyncTask. A Cancellable progress bar is shown for the time the fetch operation runs.
I want to cancel/abort the AsyncTask run when the user cancels (decides against) the operation. What is the ideal way to handle such a case?
If you're doing computations:
isCancelled() periodically.If you're doing a HTTP request:
HttpGet or HttpPost somewhere (eg. a public field).cancel, call request.abort(). This will cause IOException be thrown inside your doInBackground.In my case, I had a connector class which I used in various AsyncTasks. To keep it simple, I added a new abortAllRequests method to that class and called this method directly after calling cancel.
Our global AsyncTask class variable
LongOperation LongOperationOdeme = new LongOperation();
And KEYCODE_BACK action which interrupt AsyncTask
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_BACK) {
LongOperationOdeme.cancel(true);
}
return super.onKeyDown(keyCode, event);
}
It works for me.