为什么 android:colorBackground 在某些设备上不起作用？

Question

<resources>
    <style name="Theme.MyApplication" parent="Theme.MaterialComponents.Light">
        <item name="android:colorBackground">#26A69A</item>
    </style>
</resources>

I want to know why android:colorBackground doesn't work on some devices. I ran the app on the API 21 (Not working) , 24 (Not Working) , and 29 (Working) .

Answer 1

It's working now after I changed it like this

<resources>
    <style name="Theme.MyApplication" parent="Theme.MaterialComponents.Light">
        <item name="android:colorBackground">@color/myColor</item>
    </style>
</resources>