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Android实现夜间模式

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现在很多App都有夜间模式,特别是阅读类的App,夜间模式现在已经是阅读类App的标配了,事实上,日间模式与夜间模式就是给App定义并应用两套不同颜色的主题,用户可以自动或者手动的开启,今天用Android自带的support包来实现夜间模式。由于Support Library在23.2.0的版本中才添加了Theme.AppCompat.DayNight主题,所以依赖的版本必须是高于23.2.0的,并且,这个特性支持的最低SDK版本为14,所以,需要兼容Android 4.0的设备,是不能使用这个特性的,在API Level 14以下的设备会默认使用亮色主题。不过现在4.0以下的设备应该比较少了吧,毕竟微信的minSdkVersion都设置为14了。

添加依赖


准备资源

让应用继承DayNight主题

<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>
新建夜间模式资源文件夹:

res目录下新建values-night文件夹,然后在此目录下新建colors.xml文件在夜间模式下的应用的资源。当然也可以根据需要新建drawable-night,layout-night等后缀为-night的夜间资源文件夹。如下:


内容如下:

values/colors.xml

<?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>
values/strings.xml
<resources>
    <string name="app_name">DayNight</string>
    <string name="day_night_label">日间模式</string>
</resources>
values-night/colors.xml
<?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>
values-night/strings.xml
<resources>
    <string name="app_name">DayNight</string>
    <string name="day_night_label">夜间模式</string>
</resources>

使Activity继承自AppCompatActivity


在Application中设置初始主题


动态切换


代码逻辑实现如下:

acitivity_main.xml

<?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>

MainActivity.java

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();
            }
        });
    }
}

MyApplication.java

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);
    }
}
效果如下:



作者:shineflowers 发表于2017/3/6 11:33:25 原文链接
阅读:19 评论:0 查看评论

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