TimerActivity.java 文件源码

@Override
protected void onResume() {
    super.onResume();
    // registramos un broadcast receiver
    tickReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            if (intent.getAction().compareTo(Intent.ACTION_TIME_TICK) == 0) {
                tvHour.setText(getHour());
                tvMinute.setText(getMinute());
            }
        }
    };
    registerReceiver(tickReceiver, new IntentFilter(Intent.ACTION_TIME_TICK));
    if (!set.isRunning()) {
        set.start();
    }
}