倒計時日時分秒的完美實現。

public class MainActivity extends AppCompatActivity {
    private CountDownTimer countDownTimer;
    private TextView mtv;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mtv = (TextView) findViewById(R.id.tv);
        String endTime = "2004-03-26 13:31:40";
        String statTime = "2004-03-26 11:30:24";
        final long diffDate = TimeZoneUtil.diffDate(endTime, statTime);
        //1秒鐘請求一次，請求一小時
        countDownTimer = new CountDownTimer(1000 * 60 * 60, 1000) {
            long nowTime = diffDate;
            @Override
            public void onTick(long millisUntilFinished) {
                nowTime -= 1000;
                String data = diffTime(nowTime);
                mtv.setText(data);
            }
            @Override
            public void onFinish() {
            }
        };
        countDownTimer.start();
    }
    @Override
    protected void onDestroy() {
        super.onDestroy();
        if (countDownTimer != null) {
            countDownTimer.cancel();
        }
    }
    public static String diffTime(long diff) {
        String d = 0 + "天" + 0 + "小時" + 0 + "分" + 0 + "秒";
        try {
            long days = diff / (1000 * 60 * 60 * 24);
            long hours = (diff - days * (1000 * 60 * 60 * 24)) / (1000 * 60 * 60);
            long minutes = (diff - days * (1000 * 60 * 60 * 24) - hours * (1000 * 60 * 60)) / (1000 * 60);
            long second = (diff - days * (1000 * 60 * 60 * 24) - hours * (1000 * 60 * 60) - minutes * (1000 * 60)) / (1000);
            d = days + "天" + hours + "小時" + minutes + "分" + second + "秒";
            return d;
        } catch (Exception e) {
        }
        return d;
    }
}