Android Studio 0.3.1, appcompat-v7 and android library project always generate IllegalStateException

Question

I am developing an application that uses the libraries appcompat v7 and support-v4. The application works correctly and its main theme is derived from Theme.AppCompat.

Problems arise when I try to add any module (android library project) to the main project: I always get an IllegalStateException.

At the moment the project library is completely empty: no Java classes or XML resources, there is only the file AndroidManifest:

MyLibrary AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.viewpagerindicator"
    android:versionCode="1"
    android:versionName="1.0">

    <uses-sdk
        android:minSdkVersion="7"
        android:targetSdkVersion="18" />
    <application />
</manifest>

I also tried to add the theme Theme.AppCompat to the Application section of MyLibrary:

<?xml version="1.0" encoding="utf-8"?>
[...]
    <application android:theme="@style/Theme.AppCompat" />
</manifest>

But the result is always the same exception:

10-28 12:22:36.761    1770-1770/? E/AndroidRuntime﹕ FATAL EXCEPTION: main
    java.lang.RuntimeException: Unable to start activity ComponentInfo{com.akhela.tekpea/com.akhela.tekpea.ui.OverviewActivity}: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity.
            at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2180)
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)
            at android.app.ActivityThread.access$600(ActivityThread.java:141)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
            at android.os.Handler.dispatchMessage(Handler.java:99)
            at android.os.Looper.loop(Looper.java:137)
            at android.app.ActivityThread.main(ActivityThread.java:5041)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:511)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
            at dalvik.system.NativeStart.main(Native Method)
     Caused by: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity.
            at android.support.v7.app.ActionBarActivityDelegate.onCreate(ActionBarActivityDelegate.java:102)
            at android.support.v7.app.ActionBarActivityDelegateICS.onCreate(ActionBarActivityDelegateICS.java:58)
            at android.support.v7.app.ActionBarActivity.onCreate(ActionBarActivity.java:98)
            at com.akhela.tekpea.ui.OverviewActivity.onCreate(OverviewActivity.java:39)
            at android.app.Activity.performCreate(Activity.java:5104)
            at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)
            at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144)
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230)
            at android.app.ActivityThread.access$600(ActivityThread.java:141)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
            at android.os.Handler.dispatchMessage(Handler.java:99)
            at android.os.Looper.loop(Looper.java:137)
            at android.app.ActivityThread.main(ActivityThread.java:5041)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:511)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
            at dalvik.system.NativeStart.main(Native Method)

MyProject settings.gradle

include ':MyApp', ':MyLibrary'

MyApp build.gradle

buildscript {
    repositories {
        mavenCentral()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:0.6.+'
    }
}
apply plugin: 'android'

repositories {
    mavenCentral()
}

android {
    compileSdkVersion 18
    buildToolsVersion "18.1.1"

    defaultConfig {
        minSdkVersion 7
        targetSdkVersion 18
    }
}

dependencies {
    compile 'com.android.support:appcompat-v7:+'
    compile 'com.android.support:support-v4:+'
    compile project(":MyLibrary")
}

MyLibrary build.gradle

buildscript {
    repositories {
        mavenCentral()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:0.6.+'
    }
}
apply plugin: 'android-library'

repositories {
    mavenCentral()
}

android {
    compileSdkVersion 18
    buildToolsVersion "18.1.1"

    defaultConfig {
        minSdkVersion 7
        targetSdkVersion 18
    }
}

dependencies {
    compile 'com.android.support:appcompat-v7:+'
    compile 'com.android.support:support-v4:+'
}

Answer 1

I don't know exactly whats's happening but I suppose there are some issues during the resource merging.

I would try removing these dependencies from the application build.gradle

compile 'com.android.support:appcompat-v7:+'
compile 'com.android.support:support-v4:+'

leaving them just in the library build.gradle.