Android实现夜间模式切换功能实现代码

<resources> 
 
 <!-- Base application theme. --> 
 <style name="AppTheme" parent="Theme.AppCompat.DayNight.DarkActionBar"> 
  <!-- Customize your theme here. --> 
  <item name="colorPrimary">@color/colorPrimary</item> 
  <item name="colorPrimaryDark">@color/colorPrimaryDark</item> 
  <item name="colorAccent">@color/colorAccent</item> 
 </style> 
 
</resources> 

<?xml version="1.0" encoding="utf-8"?> 
<!-- day values colors.xml --> 
<resources> 
 <color name="colorPrimary">#009688</color> 
 <color name="colorPrimaryDark">#00796B</color> 
 <color name="colorAccent">#009688</color> 
 <color name="textColorPrimary">#616161</color> 
 <color name="viewBackground">@android:color/white</color> 
 <color name="colorDayNightChange">@android:color/holo_orange_dark</color> 
</resources> 

<resources> 
 <string name="app_name">DayNight</string> 
 <string name="day_night_label">日间模式</string> 
</resources> 

<?xml version="1.0" encoding="utf-8"?> 
<!-- night values colors.xml --> 
<resources> 
 <color name="colorPrimary">#35464e</color> 
 <color name="colorPrimaryDark">#212a2f</color> 
 <color name="colorAccent">#212a2f</color> 
 <color name="textColorPrimary">#616161</color> 
 <color name="viewBackground">#212a2f</color> 
 <color name="colorDayNightChange">@android:color/holo_blue_dark</color> 
</resources> 

<resources> 
 <string name="app_name">DayNight</string> 
 <string name="day_night_label">夜间模式</string> 
</resources> 

<?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:layout_marginLeft="10dp" 
 android:layout_marginRight="10dp"> 
 
 <TextView 
  android:layout_width="wrap_content" 
  android:layout_height="wrap_content" 
  android:gravity="center" 
  android:text="@string/day_night_label" 
  android:textSize="20sp" 
  android:textColor="@color/colorDayNightChange" /> 
 
 <Button 
  android:id="@+id/day_night_change" 
  android:layout_width="0dp" 
  android:layout_height="wrap_content" 
  android:layout_weight="1" 
  android:layout_marginLeft="5dp" 
  android:text="日夜间模式切换" 
  android:textSize="20sp" 
  android:textColor="@color/colorDayNightChange"/> 
</LinearLayout> 

package com.jackie.daynight; 
 
import android.content.res.Configuration; 
import android.os.Bundle; 
import android.support.v7.app.AppCompatActivity; 
import android.support.v7.app.AppCompatDelegate; 
import android.view.View; 
import android.widget.Button; 
 
public class MainActivity extends AppCompatActivity { 
 private Button mDayNightChange; 
 
 @Override 
 protected void onCreate(Bundle savedInstanceState) { 
  super.onCreate(savedInstanceState); 
  setContentView(R.layout.activity_main); 
 
  mDayNightChange = (Button) findViewById(R.id.day_night_change); 
 
  mDayNightChange.setOnClickListener(new View.OnClickListener() { 
   @Override 
   public void onClick(View v) { 
    int mode = getResources().getConfiguration().uiMode & Configuration.UI_MODE_NIGHT_MASK; 
    if (mode == Configuration.UI_MODE_NIGHT_YES) { 
     getDelegate().setLocalNightMode(AppCompatDelegate.MODE_NIGHT_NO); 
    } else if (mode == Configuration.UI_MODE_NIGHT_NO) { 
     getDelegate().setLocalNightMode(AppCompatDelegate.MODE_NIGHT_YES); 
    } 
 
    recreate(); 
   } 
  }); 
 } 
} 

package com.jackie.daynight; 
 
import android.app.Application; 
import android.support.v7.app.AppCompatDelegate; 
 
/** 
 * Created by Jackie on 2017/3/6. 
 * Application 
 */ 
 
public class MyApplication extends Application { 
 @Override 
 public void onCreate() { 
  super.onCreate(); 
 
  /** 
   * 默认设置一直使用夜间模式 
   * 
   * 这里AppCompatDelegate.setDefaultNightMode()方法可以接受的参数值有4个： 
   * MODE_NIGHT_NO. Always use the day (light) theme(一直应用日间(light)主题). 
   * MODE_NIGHT_YES. Always use the night (dark) theme(一直使用夜间(dark)主题). 
   * MODE_NIGHT_AUTO. Changes between day/night based on the time of day(根据当前时间在day/night主题间切换). 
   * MODE_NIGHT_FOLLOW_SYSTEM(默认选项). This setting follows the system's setting, which is essentially MODE_NIGHT_NO(跟随系统，通常为MODE_NIGHT_NO). 
   */ 
  AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_YES); 
 } 
}