Need Help To Interpret Google's Camcorder App-update Timer

The function below is part of the code for Google's Camera app. It is supposed to update a text view that displays dynamically the time elapsed since start of recording. But this f

Solution 1:

mHandler.sendEmptyMessageDelayed(UPDATE_RECORD_TIME, next_update_delay); 

This line sends an event after next_update_delay timespan. I suppose, there's a declaration of mHandler somewhere and code that handles the UPDATE_RECORD_TIME event. I'd bet it calls updateRecordingTime, which in turn sends the message after a period of time.

This is the asynchronous version of a loop. The method does its work and then schedules itself to be executed after some time.

There must, however, be an initial call to either updateRecordingTime or to the sendMessageDelayed method somewhere outside updateRecordingTime to initially start the loop.