Android Gradle referencing styles from dependent module - resources

Question

so I have an Android project in Android Studio (0.6.1). There are 2 Modules A and B. A is my main-module and it depends on B which includes various resources (drawables, strings, styles) and therefore functions as something like a library (although it is no library-project). I added B as git-subtree, included it in my settings.gradle and building works fine.
Now there is a problem: I want to reference resources from B in A. For drawables I already found out here that I can just create dummy resources in A that will be overridden by B. But unfortunately that doesn't work for styles, that are defined in B. The dummies I create in styles.xml in A are not overwritten.
My aim is to define multiple styles in B like:
<style name="ButtonStyle1" parent="android:Widget.Button">
<item name="android:layout_width">wrap_content</item>
<item name="android:minWidth">200dp</item>
<item name="android:background">#drawable/buttonorange</item>
<item name="android:textColor">#android:color/black</item>
</style>
<style name="ButtonStyle2" parent="android:Widget.Button">
<item name="android:layout_width">wrap_content</item>
<item name="android:minWidth">200dp</item>
<item name="android:background">#drawable/buttonorange</item>
<item name="android:textColor">#android:color/black</item>
</style>
And then back in A I want to have the opportunity to choose wether to apply ButtonStyle1 or ButtonStyle like:
<style name="AppTheme" parent="android:Theme.Holo.Light.DarkActionBar">
<item name="android:buttonStyle">#style/ButtonStyle1</item>
</style>
or
<style name="AppTheme" parent="android:Theme.Holo.Light.DarkActionBar">
<item name="android:buttonStyle">#style/ButtonStyle2</item>
</style>
But when I do this, I always get
Error:(5, 42) No resource found that matches the given name (at 'android:buttonStyle' with value '#style/ButtonStyle1').
All in all I guess that my gradle configuration itself is correct because overriding drawables works fine already. So what am I doing wrong - how can I reference styles defined in B in A?
settings.gradle
include ':app', ':uiframework:uiframework'
build.gradle from A
apply plugin: 'android'
android {
compileSdkVersion 19
buildToolsVersion '19.1.0'
defaultConfig {
applicationId 'com.example.uiframeworkexample'
minSdkVersion 14
targetSdkVersion 19
versionCode 1
versionName '1.0'
}
buildTypes {
release {
runProguard false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
productFlavors {
}
}
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
compile project(':uiframework:uiframework')
}

Answer 1

Make sure you apply correct plugin for your B(library) project at build.gradle file
apply plugin: 'com.android.library'