android 传感器

package com.itheima.sensor;

import android.app.Activity;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.os.Bundle;

public class MainActivity extends Activity implements SensorEventListener {

    private SensorManager manager;
    private Sensor sensor;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        manager = (SensorManager) getSystemService(SENSOR_SERVICE);
        sensor = manager.getDefaultSensor(Sensor.TYPE_LIGHT);
    }
    
    @Override
    protected void onResume() {
        super.onResume();
        manager.registerListener(this, sensor, SensorManager.SENSOR_DELAY_NORMAL);    // 注册监听器
    }
    
    @Override
    protected void onPause() {
        super.onPause();
        manager.unregisterListener(this);    // 注销监听
    }

    @Override
    public void onSensorChanged(SensorEvent event) {
        /*
        float x = event.values[0];
        float y = event.values[1];
        float z = event.values[2];
        System.out.println("x = " + x + ", y = " + y + ", z = " + z);
        */
        
        System.out.println(event.values[0]);
    }

    @Override
    public void onAccuracyChanged(Sensor sensor, int accuracy) {
    }

}