android视频录制时显示定时器

// 示例代码：优化定时器更新逻辑
public class VideoRecorder {
    private Handler handler = new Handler();
    private Runnable runnable;
    private long startTime;

    public void startRecording() {
        startTime = System.currentTimeMillis();
        runnable = new Runnable() {
            @Override
            public void run() {
                long elapsedTime = System.currentTimeMillis() - startTime;
                updateTimer(elapsedTime);
                handler.postDelayed(this, 1000); // 每秒更新一次
            }
        };
        handler.post(runnable);
    }

    private void updateTimer(long elapsedTime) {
        // 更新UI显示的定时器
        runOnUiThread(() -> {
            timerTextView.setText(formatTime(elapsedTime));
        });
    }

    private String formatTime(long timeInMillis) {
        int hours = (int) (timeInMillis / 3600000);
        int minutes = (int) ((timeInMillis % 3600000) / 60000);
        int seconds = (int) ((timeInMillis % 60000) / 1000);
        return String.format("%02d:%02d:%02d", hours, minutes, seconds);
    }

    public void stopRecording() {
        handler.removeCallbacks(runnable);
    }
}