Android Tutorial => Theme inheritance

Example

When defining themes, one usually uses the theme provided by the system, and then changes modifies the look to fit his own application. For example, this is how the Theme.AppCompat theme is inherited:

<style name="AppTheme" parent="Theme.AppCompat">
    <item name="colorPrimary">@color/colorPrimary</item>
    <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
    <item name="colorAccent">@color/colorAccent</item>
</style>

This theme now has all the properties of the standard Theme.AppCompat theme, except the ones we explicitly changed.

There is also a shortcut when inheriting, usually used when one inherits from his own theme:

<style name="AppTheme.Red">
    <item name="colorAccent">@color/red</item>
</style>

Since it already has AppTheme. in the start of it's name, it automatically inherits it, without needing to define the parent theme. This is useful when you need to create specific styles for a part (for example, a single Activity) of your app.

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Android

Android Theme, Style, Attribute Theme inheritance

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