游戏开始时:
long tStart = System.currentTimeMillis();
游戏结束时:
long tEnd = System.currentTimeMillis();long tDelta = tEnd - tStart;double elapsedSeconds = tDelta / 1000.0;

游戏开始时:
long tStart = System.currentTimeMillis();
游戏结束时:
long tEnd = System.currentTimeMillis();long tDelta = tEnd - tStart;double elapsedSeconds = tDelta / 1000.0;