java - 我正在尝试使用 OnChronometerTickListener 实现计时器

Question

我基本上希望我的应用程序中有一个秒表 Activity ，它会在 30 秒过去后振动设备，并在 60 秒时发出通知警报。我是应用程序开发新手，所以请不要因为我错过了明显的答案而困扰我。

我知道我需要Chronometer.OnChronometerTickListener - 但不确定如何实现？

public void shotClockStart(View v) {

        Chronometer shotclock = (Chronometer) findViewById(R.id.chrono1);
        shotclock.start();
        long timeElapsed = SystemClock.elapsedRealtime() - shotclock.getBase();
        if (timeElapsed >= 30000) {
            //  HERE I WANT A VIBRATION ON THE DEVICE.
        }else if(timeElapsed>=60000){
            //HERE I WANT A NOTIFICATION ALERT 
        }
    }

Answer 1

您必须在Chronometer上设置监听器

public void shotClockStart(View v) {
    Chronometer shotclock = (Chronometer) findViewById(R.id.chrono1);
    shotclock.setOnChronometerTickListener(new Chronometer.OnChronometerTickListener() {
        @Override
        public void onChronometerTick(Chronometer chronometer) {
            long timeElapsed = SystemClock.elapsedRealtime() - chronometer.getBase();
            if (timeElapsed >= 30000) {
                //  HERE I WANT A VIBRATION ON THE DEVICE.
            }else if(timeElapsed>=60000){
                //HERE I WANT A NOTIFICATION ALERT
            }
        }
    });
    shotclock.setBase(SystemClock.elapsedRealtime());
    shotclock.start();
}