光照传感器---Sensor.TYPE_LIGHT

光照传感器---Sensor.TYPE_LIGHT。

1.布局
放置一个TextView，用于显示当前光照强度。

2.activity

public class MainActivity extends AppCompatActivity {

    @BindView(R.id.tv_light_level)
    TextView tvLightLevel;

    private SensorManager sensorManager;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        ButterKnife.bind(this);

        sensorManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE);
        Sensor sensor = sensorManager.getDefaultSensor(Sensor.TYPE_LIGHT);
        sensorManager.registerListener(listener, sensor, SensorManager.SENSOR_DELAY_NORMAL);
    }

    private SensorEventListener listener = new SensorEventListener() {
        @Override
        public void onSensorChanged(SensorEvent event) {
            //values数组中第一个下标的值就是当前的光照强度
            float value = event.values[0];
            tvLightLevel.setText("当前光照强度：" + value + "lx");
        }

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

    @Override
    protected void onDestroy() {
        super.onDestroy();
        if(sensorManager != null){
            sensorManager.unregisterListener(listener);
        }
    }
}