Android 计时器

<Chronometer    android:text="Chronometer"    android:id="@+id/chronometer1"    android:layout_width="wrap_content"    Android:layout_height="wrap_content" />Chronometer chronometer = (Chronometer) findViewById(R.id.chronometer1);chronometer.setBase(SystemClock.elapsedRealtime());//设置起始时间chronometer.setFormat("已用时间: %s");chronometer.start();//添加监听器chronometer.setOnChronometerTickListener(new Chronometer.OnChronometerTickListener() {    @Override    public void onChronometerTick(Chronometer chronometer) {        if(SystemClock.elapsedRealtime()-chronometer.getBase()>=10000){            chronometer.stop();        }    }});