Question

Please don’t think it’s a redundant question. Please read completely.

I have an infinite loop inside the doInBackground(Void… params) of AsyncTask. And there’s a callback function within doInBackground(). So, I am not able to terminate this task using cancel(), onCancelled() and isCancelled() approach. The problem is the execution waits at the callback function forever. So, no matter where (within doInBackground) I write this isCancelled() check to break out of the infinite loop, it doesnt get executed.

Does anyone have a solution for this kind of problem? Or anyone had a requirement similar to this?

@Override
protected void onCancelled()
{
    // Socket Close
}

@Override
    protected Void doInBackground(Void... params)
    {
        try
        {
            // Socket Open

            while (true)
            {

                socket.receive();
            }
        }
        catch (Exception e)
        {

        }
        return null;
    }

Answer 1

Before you start with any receiving operations, call socket.setSoTimeout(int timeout) and give it a timeout according to your needs (If you usually wait a little time for data, you can use 1000ms or less. If it might take long to receive data, use a greater value, 10000ms for example).

Then, in your loop, after socket.receive method, check if the task was cancelled (isCancelled() == true) and if it was, break out from the loop.