正向计时器：Android录音录屏时的计时器

Posted 2021-07-28 zhangjin1120

    <Chronometer
        android:id="@+id/ct"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"/>

• 显示：00:00:00

        Chronometer c = findViewById(R.id.ct);
        c.setOnChronometerTickListener(new Chronometer.OnChronometerTickListener() {
            @Override
            public void onChronometerTick(Chronometer chronometer) {
                long time = SystemClock.elapsedRealtime() - chronometer.getBase();
                int h = (int) (time / 3600000);
                int m = (int) (time - h * 3600000) / 60000;
                int s = (int) (time - h * 3600000 - m * 60000) / 1000;
                String t = (h < 10 ? "0" + h : h) + ":" + (m < 10 ? "0" + m : m) + ":" + (s < 10 ? "0" + s : s);
                chronometer.setText(t);
            }
        });
        c.setBase(SystemClock.elapsedRealtime());
        c.setText("00:00:00");
        c.start();

• 显示:00:00

 Chronometer c = findViewById(R.id.ct);
 c.start();