Extract Support Library layout attributes into styles
android, android-studio, android-styles, android-support-library
Solution
I have found this answer to a similar question. The same solution worked for me.
Just leave out the namespace prefix for the non-"android" attributes:
`app:layout_columnSpan="2"` in the layout becomes
`<item name="layout_columnSpan">2</item>` in the styles, and not
`<item name="app:layout_columnSpan">2</item>`
Problem
I am extracting styles for views which are inside Support Library's `GridLayout`. Therefore, I have both attributes from the "android" namespace, e.g. `android:layout_marginLeft="8dp"` and attributes from the "app" (http://schemas.android.com/apk/res-auto) one, e.g. `app:layout_columnSpan="2"`. First, Android Studio doesn't recognize the attributes from "app" when I try to extract the attributes as a style. Second, it doesn't seem that extracting them into styles.xml manually brings any effect to the actual layout. So, is it possible to extract the Support Library attributes as a separate style, and how?