Does Thread.sleep() makes the UI Thread to sleep?

Question

Will this make the current UI thread to sleep?

try 
{
   Thread.sleep(20);
   onProgressUpdate(i);
} catch (InterruptedException e) {
      e.printStackTrace         


        

Answer 1

If you are calling sleep on the ui thread it blocks the ui thread. Do not call sleep on the ui thread. You should not block the ui thread.

http://developer.android.com/reference/java/lang/Thread.html

http://docs.oracle.com/javase/tutorial/essential/concurrency/sleep.html

You will get ANR

If you implement Thread or HandlerThread, be sure that your UI thread does not block while waiting for the worker thread to complete—do not call Thread.wait() or Thread.sleep().

http://developer.android.com/training/articles/perf-anr.html

Also check the topic under How to Avoid ANRs