Styles vs. Themes and Attribute Resolution in Android
This tests your grasp of Android's resource indirection. A Style is a set of attributes for one View type. A Theme is a collection of named attributes for an app or Activity. `?attr` is resolved at runtime against the Theme, while `@color` is a direct.
This question tests your deep understanding of Android's resource system, particularly the powerful indirection mechanism of themes. A great answer distinguishes a Style (attributes for a specific View type) from a Theme (a named map of attributes for an app/Activity). Then, it explains that `?attr/colorPrimary` is a runtime lookup against the current Theme, while `@color/purple_500` is a direct reference resolved at compile time. The key red flag is treating themes and styles as interchangeable.
Read the original → developer.android.com
- #android
- #ui
- #theming
- #resources
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