Android 传感器--光照传感器详解及使用

sensorManager.registerListener(new SensorEventListener() {
 @Override
 public void onSensorChanged(SensorEvent event) {
//监视传感器的改变

//accuracy 传感器的精度 通过event.accuracy获取

//values 传感器传回的数值 如event.values[0] 获取光线强度lux

//timestamp 传感器事件发生的时间（以纳秒为单位）
}

 @Override
 public void onAccuracyChanged(Sensor sensor, int accuracy) {
//对传感器精度的改变做出反应
}
 }, sensor, SensorManager.SENSOR_DELAY_NORMAL);

public class MainActivity extends Activity {

  private TextView value_tv;

  private SensorManager sensorMamager;

  private Sensor sensor;

  @Override

  protected void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);

    setContentView(R.layout.activity_main);

    value_tv=(TextView) findViewById(R.id.value_tv);

    //获取SensorManager对象

    sensorMamager=(SensorManager) getSystemService(SENSOR_SERVICE);

    //获取Sensor对象

    sensor=sensorMamager.getDefaultSensor(Sensor.TYPE_LIGHT);

    sensorMamager.registerListener(new SensorEventListener() {

       

      @Override

      public void onSensorChanged(SensorEvent event) {

         //获取精度 

        float acc = event.accuracy; 

        //获取光线强度 

        float lux = event.values[0];  

        value_tv.setText("acc:"+acc+";"+"lux："+lux);

      }

       

      @Override

      public void onAccuracyChanged(Sensor sensor, int accuracy) {

        // TODO 自动生成的方法存根

      }

    }, sensor, SensorManager.SENSOR_DELAY_NORMAL);

  }

}