The socket should be set to a specific timeout

[zefanxu]

The socket maybe blocking, so a timeout should be set on that socket. Otherwise due to the background thread is running sequentially, the other async task in the same activity will be blocked.

[AKTanara]

Thanks for the clue... I even didn't know this! Beside what you told I have found another work around: instead of using discover.execute(); I have used discover.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR); This way they AsyncTasks won't block each other.