How to use namespace "app" in a style?

Asked Oct 26 '15 at 21:31

Active Oct 26 '15 at 21:31

Viewed 328 times

In tabs.xml I can set the following property on android.support.design.widget.TabLayout:

app:tabIndicatorColor="@android:color/white"

However, I want to use a style by setting:

   android:theme="@style/TabsLight"

then defining:

<style name="TabsLight" parent="ThemeOverlay.AppCompat.ActionBar">
    <item name="app:tabIndicatorColor">@android:color/white</item>
 </style>

This doesn't work, giving me error:

Error APT0000: No resource found that matches the given name: attr 'app:tabIndicatorColor'. (APT0000)

Why am I getting this error (which doesn't happen if I set the property on the layout directly) and how do I resolve it?

The namespace "app" is defined in tabs.xml as:

xmlns:app="http://schemas.android.com/apk/res-auto"

asked Oct 26 '15 at 21:31

SpaceMonkey

Do you have a `res/values/attrs.xml` file that defines the `tabIndicatorColor` attribute? More information in this answer: http://stackoverflow.com/a/3441986/49489 – Barend Oct 26 '15 at 21:59
No, why would I need that? This is an attribute defined by AppCompat library, I believe – SpaceMonkey Oct 26 '15 at 21:59
Because that makes the `tabIndicatorColor` name available to use in your namespace and corresponding `R.java` file. – Barend Oct 26 '15 at 22:00
@Barend Check my edit. It works fine on the layout itself – SpaceMonkey Oct 26 '15 at 22:00
Hang on, I may have been confused. – Barend Oct 26 '15 at 22:01
Yeah, forget all I wrote. Sorry. – Barend Oct 26 '15 at 22:03

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