How to change the background/text color of a layout when daynight theme is used

Question

I'm using Theme.AppCompat.DayNight and I want to customize a certain layout background and text color to change depending on whether it's day or night mode .

Here's what I tried so far:

<style name="AppTheme" parent="Theme.AppCompat.DayNight.NoActionBar">
    <!-- Customize your theme here. -->
    <item name="colorPrimary">@color/primaryDarkColorAmber</item>
    <item name="colorPrimaryDark">@color/primaryDarkColorAmber</item>
    <item name="colorControlActivated">@color/primaryDarkColorAmber</item>
</style>

<style name="PopUpTheme" parent="AppTheme">
    <!-- layout custom theme there's no darkBackground value...!! -->
    <item name="android:background">@color/popup_background</item>
</style>

Answer 1

首先创建 res/values-night 这个目录然后添加与 res/value 文件相同的文件，您可以复制并替换为颜色，然后当您更改白天或夜间主题时，您可以根据自己的风格获取颜色

Answer 2

If you are following Android's Color theming System , then you can use:

<View
...
android:background="?android:attr/colorBackground"
.../>

Similarly, for texts you can use ?android:attr/textColorPrimary and for icons ?attr/colorControlNormal . This way you do not need to create separate value files.

You can find more details here .