很常见的需求：App 通过手机光感器，获取当前的光线强度。根据光线强弱，弹窗提示用户是否切换白天/夜间模式。网上看了很多的博客，都没有解决我的问题。这个需求应该是挺常见的，
 layout/activity_main.xml界面布局代码如下：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:padding="10dp">

    <CheckBox
        android:id="@+id/ck_bright"
        android:layout_width="match_parent"
        android:layout_height="50dp"
        android:button="@null"
        android:checked="false"
        android:drawableLeft="@drawable/ck_status_selector"
        android:padding="10dp"
        android:text="亮度自动调节"
        android:textColor="#ff000000"
        android:textSize="18sp" />

    <TextView
        android:id="@+id/tv_light"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="left"
        android:padding="10dp"
        android:text="看看光线变化了没有"
        android:textColor="#ff000000"
        android:textSize="18sp" />

</LinearLayout>
  MainActivity.java逻辑代码如下：
package com.fukaimei.lightsensor;

import android.content.Context;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.CompoundButton.OnCheckedChangeListener;
import android.widget.TextView;

import com.fukaimei.lightsensor.util.SwitchUtil;
import com.fukaimei.lightsensor.util.Utils;

public class MainActivity extends AppCompatActivity implements
        OnCheckedChangeListener, SensorEventListener {
    private CheckBox ck_bright;
    private TextView tv_light;
    private SensorManager mSensroMgr;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        ck_bright = (CheckBox) findViewById(R.id.ck_bright);
        if (SwitchUtil.getAutoBrightStatus(this) == true) {
            ck_bright.setChecked(true); android光线传感器开发:http://www.751com.cn/fanwen/lunwen_30827.html