Android Simple Timing Question

I need to implement a millisecond-accurate timer for a small game. Which method would be the most appropriate for this? My current approach is to use System.currentTimeMillis(). It s开发者_C百科eems to work well enough, but maybe there's some pitfall I'm not aware of. What would be the standard approach to timing?

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Your timer will only be as good as your system implements it. It simply won't get better than that.

Being a ex-professional game developer (and still do side projects) I would recommend against a millisecond-accuracy requirement. You probably don't need it.

Determine your clock accuracy with this program:

/*
C:\junk>javac TimerTest.java

C:\junk>java TimerTest
Your delay is : 16 millis

C:\junk>
*/
class TimerTest {

    public static void main(String[] args) {
        long then = System.currentTimeMillis();
        long now = then;
            // this loop just spins until the time changes.
            // when it changes, we will see how accurate it is
        while((now = System.currentTimeMillis()) == then); // busy wait
        System.out.println("Your delay is : " + (now-then) + " millis");

    }
}