Android wait AsyncTask to finish

Question

I have a function, AppHelper.isOnline(Context context), I call in various parts of my application to check that a session didn\'t timeout before making an HTTP

Answer 1

Rafiq's response did not work for me - the app hung. I think the reason has to do with the nature of isCancelled(): "Returns true if this task was cancelled before it completed normally." If the task completes normally (i.e. is not cancelled) then while(!task.isCancelled()) { } will loop forever.

To solve this create a Boolean flag that you instatiate to false and then flip to true in task.onPostExecute(). Then do while(!flag) { } before switching Activities. Additionally, if you'd like to give the main thread a 'break' to let the AsyncTask process a little faster, you can do try this:

while (!flag) {
    try { Thread.sleep(100); }
    catch (InterruptedException e) { e.printStackTrace(); }
}

It seems to be working well for me.