能否等待传感器监听器执行一次之后继续执行？

Question

    countDownLatch = new CountDownLatch(1);
    mManager2 = (SensorManager) context.getSystemService(Context.SENSOR_SERVICE);
    Sensor mSensor2 = mManager2.getDefaultSensor(Sensor.TYPE_PROXIMITY);
    SensorEventListener mListener2 = new SensorEventListener() {
        public void onAccuracyChanged(Sensor sensor, int accuracy) {}
        public void onSensorChanged(SensorEvent event) {
            p = event.values[0];
            mManager2.unregisterListener(this);
            countDownLatch.countDown();
        }
    };
    mManager2.registerListener(mListener2, mSensor2, SensorManager.SENSOR_DELAY_GAME);
    try {
        countDownLatch.await();
    } catch (InterruptedException e) {
        e.printStackTrace();
    }
    boolean isProximate = p < 0.5;

大概就是上面那样，我修改之前没保存。onSensorChanged 里面的好像根本就不会执行。

Answer 1

之后用英文搜索找到方法了，能用的代码：
https://segmentfault.com/q/10...
不过不知道有没有问题。