如何有一个适当的暗光主题与闪屏

Question

我读到过有一种方法可以有一个values-night和一个values-folder。但是如何从价值改变到价值-晚上开始之前，因为我的闪屏。我知道一定有一种方法来拥有一个黑暗和光明主题的闪屏，因为WhatsApp。

如何改变到值-夜前闪屏显示？

Answer 1

下面试试我正在使用的黑暗模式代码。

步骤-1

首先，创建夜间文件夹到您的资源文件，如下面的图像（即值-夜间）

步骤-2

创建样式，字符串和颜色xml文件的夜间模式同下图，并添加您的夜间模式颜色，字符串和样式，您想要显示在您的应用程序时，夜间模式是应用。

为了更好的用户体验，在您的风格中添加窗口动画。

值-->style.xml

<resources xmlns:tools="http://schemas.android.com/tools">

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

    <style name="NoActionBarAppTheme" parent="Theme.AppCompat.DayNight.NoActionBar">
        <!-- Customize your theme here. -->
        <item name="colorPrimary">@color/white</item>
        <item name="colorPrimaryDark">@color/white</item>
        <item name="colorAccent">@color/main_click_txt</item>
        <item name="android:windowLightStatusBar" tools:targetApi="m">true</item>
    </style>

    <!-- Add this theme where you change mode -->
    <style name="NoActionBarWithChangeTheme" parent="Theme.AppCompat.DayNight.NoActionBar">
        <!-- Customize your theme here. -->
        <item name="colorPrimary">@color/white</item>
        <item name="colorPrimaryDark">@color/white</item>
        <item name="colorAccent">@color/main_click_txt</item>
        <item name="android:windowAnimationStyle">@style/WindowAnimationTransition</item>
        <item name="android:windowLightStatusBar" tools:targetApi="m">true</item>
    </style>

    <!-- This will set the fade in animation on your change theme activity by default -->
    <style name="WindowAnimationTransition">
        <item name="android:windowEnterAnimation">@anim/fade_in</item>
        <item name="android:windowExitAnimation">@anim/fade_out</item>
    </style>

</resources>

values-night-->style.xml

<!-- Base application theme. values-night.xml -->
<style name="NoActionBarAppTheme" parent="Theme.AppCompat.DayNight.NoActionBar">
    <!-- Customize your theme here. -->
    <item name="colorPrimary">@color/white</item>
    <item name="colorPrimaryDark">@color/white</item>
    <item name="colorAccent">@color/main_click_txt</item>
    <item name="android:windowLightStatusBar" tools:targetApi="m">true</item>
</style>

<!-- Add this theme where you change mode -->
<style name="NoActionBarWithChangeTheme" parent="Theme.AppCompat.DayNight.NoActionBar">
    <!-- Customize your theme here. -->
    <item name="colorPrimary">@color/white</item>
    <item name="colorPrimaryDark">@color/white</item>
    <item name="colorAccent">@color/main_click_txt</item>
    <item name="android:windowAnimationStyle">@style/WindowAnimationTransition</item>
    <item name="android:windowLightStatusBar" tools:targetApi="m">true</item>
</style>

<!-- This will set the fade in animation on your change activity by default -->
<style name="WindowAnimationTransition">
    <item name="android:windowEnterAnimation">@anim/fade_in</item>
    <item name="android:windowExitAnimation">@anim/fade_out</item>
</style>

fade_in.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android" android:interpolator="@android:anim/linear_interpolator">
    <alpha
        android:duration="2000"
        android:fromAlpha="0.0"
        android:toAlpha="1.0">
    </alpha>
</set>

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
    android:interpolator="@android:anim/linear_interpolator">
    <alpha
        android:duration="2000"
        android:fromAlpha="1.0"
        android:toAlpha="0.0" >
    </alpha>
</set>

步骤-3

如果你想在安装应用程序时首次将夜间模式设置为设备模式，请在启动屏幕中添加下面的代码。

@Override
protected void onCreate(Bundle savedInstanceState) {
    if (!CommonUtils.isToogleEnabled(SplashActivity.this)) {
        if (CommonUtils.isDarkMode(SplashActivity.this)) {
            CommonUtils.setIsNightModeEnabled(SplashActivity.this, true);
            AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_YES);
        } else {
            CommonUtils.setIsNightModeEnabled(SplashActivity.this, false);
            AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_NO);
        }
    } else {
        if (CommonUtils.isNightModeEnabled(SplashActivity.this)) {
            AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_YES);
        } else {
            AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_NO);
        }
    }
    super.onCreate(savedInstanceState);

    ...
    //your code
}

步骤4

@Override
protected void onCreate(Bundle savedInstanceState) {
    if (CommonUtils.isNightModeEnabled(MainActivity.this)) {
        AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_YES);
    } else {
        AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_NO);
    }
    super.onCreate(savedInstanceState);

    ...
    //your code
}

private WeakReference<Activity> mActivity;

binding.imgNightMode.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View view) {
        mActivity = new WeakReference<Activity>(MainActivity.this);
        CommonUtils.setIsToogleEnabled(MainActivity.this, true);
        if (CommonUtils.isNightModeEnabled(MainActivity.this)) {
            CommonUtils.setIsNightModeEnabled(MainActivity.this, false);
            mActivity.get().recreate();
        } else {
            CommonUtils.setIsNightModeEnabled(MainActivity.this, true);
            mActivity.get().recreate();
        }
    }
});

private static final String NIGHT_MODE = "NIGHT_MODE";
private static final String TOOGLE = "TOOGLE";

public static boolean isNightModeEnabled(Context context) {
    SharedPreferences mPrefs = context.getSharedPreferences("MY_PREF", MODE_PRIVATE);
    return mPrefs.getBoolean(NIGHT_MODE, false);
}

public static void setIsNightModeEnabled(Context context, boolean isNightModeEnabled) {
    SharedPreferences mPrefs = context.getSharedPreferences("MY_PREF", MODE_PRIVATE);
    SharedPreferences.Editor editor = mPrefs.edit();
    editor.putBoolean(NIGHT_MODE, isNightModeEnabled);
    editor.apply();
}

public static void setIsToogleEnabled(Context context, boolean isToogleEnabled) {
    SharedPreferences mPrefs = context.getSharedPreferences("MY_PREF", MODE_PRIVATE);
    SharedPreferences.Editor editor = mPrefs.edit();
    editor.putBoolean(TOOGLE, isToogleEnabled);
    editor.apply();
}

public static boolean isToogleEnabled(Context context) {
    SharedPreferences mPrefs = context.getSharedPreferences("MY_PREF", MODE_PRIVATE);
    return mPrefs.getBoolean(TOOGLE, false);
}

public static boolean isDarkMode(Activity activity) {
    return (activity.getResources().getConfiguration()
            .uiMode & Configuration.UI_MODE_NIGHT_MASK) == Configuration.UI_MODE_NIGHT_YES;
}

希望这能帮到你！

谢谢你。