android监听系统时间

IntentFilter filter = new IntentFilter();

    filter.addAction(Intent.ACTION_TIME_TICK);

    filter.addAction(Intent.ACTION_TIMEZONE_CHANGED);

    mContext.registerReceiver(mIntentReceiver, filter, null, null);

 private BroadcastReceiver mIntentReceiver = new BroadcastReceiver() {

        @Override

        public void onReceive(Context context, Intent intent) {

            String action = intent.getAction();

            if (action.equals(Intent.ACTION_TIME_TICK)

                    || action.equals(Intent.ACTION_TIMEZONE_CHANGED)) {

                updateClock();

            }

        }

    };