Code example for Chronometer

			@Override 
			public void onClick(View arg0) {
 
				int stoppedMilliseconds = 0;
				 
				String chronoText = timeWaitingChronometer.getText().toString();
				String array[] = chronoText.split(":");
				 
				if (array.length == 2){
					 
					stoppedMilliseconds = Integer.parseInt(array[0]) *60*1000 +
							Integer.parseInt(array[1]) * 1000;
					 
				} else if (array.length == 3) {
					 
					stoppedMilliseconds = Integer.parseInt(array[0]) * 60 * 60 * 1000 +
							Integer.parseInt(array[1]) * 60 * 1000 + 
							Integer.parseInt(array[2]) * 1000;
					 
				} 
				 
				timeWaitingChronometer.setBase(SystemClock.elapsedRealtime() - stoppedMilliseconds);
				 
				secondsYouWaited = Long.parseLong(array[1]);
				 
				updateTipBasedOnTimeWaited(secondsYouWaited);
				 
				timeWaitingChronometer.start();
				 
			} 
			 
		});