Timer Class

import android.util.Log;

public class Timer {

	int _counter = 0;
	String _name;
	int _numframes;
	boolean started = false;

	long _starttime;

	double _cumulative = 0;
	double _lastElapsed = 0;
	double _lastAverage = 0;
	double _lastWorst = 0;

	public Timer(String name, int framecount){
		_name = name;
		_numframes = framecount;
	}

	public void start(){
		_starttime = System.nanoTime();
		started = true;
	}

	public void end(){
		if(!started) return;
		started = false;

		long endtime = System.nanoTime();
		_lastElapsed = (double)(endtime -_starttime)/ 1.0E9;
		_lastWorst = Math.max(_lastWorst, _lastElapsed);
		_cumulative += _lastElapsed;

		if(++_counter >= _numframes){
			_lastAverage = _cumulative/_numframes;
			Log.d("Timer", _name + ": " +
                                   String.format("%.2f",_lastAverage*1000) +
                                   "ms (worst " +
                                   String.format("%.2f",_lastWorst*1000) +
                                   "ms)"
                        );
			_counter = 0;
			_cumulative =0;
			_lastWorst = 0;
		}
	}
}