Android: ClassNotFoundException when running ActionBarSherlock-Plugin-Maps

I am trying to setup an example project that uses Jake Wharton's ActionBarSherlock with ActionBarSherlock-Plugin-Maps. I follow the instructions here and here. I do not necessarily need Fragments. Here is the simple class I created. ``` package com.example.actionbarsherlock; import android.os.Bundle; import com.actionbarsherlock.app.SherlockMapActivity; public class MainActivity extends SherlockMapActivity { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); } @Override protected boolean isRouteDisplayed() { return false; } } ``` Although I tried to follow the exact descriptions I end up with a `ClassNotFoundException` when I launch the application. Here is the stacktrace. ``` Unable to resolve superclass of Lcom/actionbarsherlock/app/SherlockMapActivity; (729) Link of class 'Lcom/actionbarsherlock/app/SherlockMapActivity;' failed Unable to resolve superclass of Lcom/example/actionbarsherlock/MainActivity; (533) Link of class 'Lcom/example/actionbarsherlock/MainActivity;' failed D/AndroidRuntime(408): Shutting down VM threadid=3: thread exiting with uncaught exception (group=0x4001b188) Uncaught handler: thread main exiting due to uncaught exception java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.example.actionbarsherlock/com.example.actionbarsherlock.MainActivity}: java.lang.ClassNotFoundException: com.example.actionbarsherlock.MainActivity in loader dalvik.system.PathClassLoader@44e8ca40 at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2417) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2512) at android.app.ActivityThread.access$2200(ActivityThread.java:119) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1863) at android.os.Handler.dispatchMessage(Handler.java:99) at android.os.Looper.loop(Looper.java:123) at android.app.ActivityThread.main(ActivityThread.java:4363) at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:521) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618) at dalvik.system.NativeStart.main(Native Method) Caused by: java.lang.ClassNotFoundException: com.example.actionbarsherlock.MainActivity in loader dalvik.system.PathClassLoader@44e8ca40 at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:243) at java.lang.ClassLoader.loadClass(ClassLoader.java:573) at java.lang.ClassLoader.loadClass(ClassLoader.java:532) at android.app.Instrumentation.newActivity(Instrumentation.java:1021) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2409) ... 11 more threadid=7: reacting to signal 3 Unable to open stack trace file '/data/anr/traces.txt': Permission denied ``` I tested the library before and created a subclass of `SherlockActivity` which worked fine. While doing so, I noticed that the same `ClassNotFoundException` occurs when I forget to configure the `android:theme` setting in `AndroidManifest.xml`. Here is the file for both (`SherlockActivity` and `SherlockMapActivity`) example projects, just in case: ``` <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.actionbarsherlock" android:versionCode="1" android:versionName="1.0" > <uses-sdk android:minSdkVersion="7" android:targetSdkVersion="15" /> <application android:icon="@drawable/ic_launcher" android:label="@string/app_name" android:theme="@style/AppTheme" > <activity android:theme="@style/Theme.Sherlock" android:name=".MainActivity" android:label="@string/title_activity_main" > <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application> </manifest> ``` Update: After adding the `uses-library` setting as suggested by Raghav Sood and M Mohsin Naeem I run into the following message. ``` Installation error: INSTALL_FAILED_MISSING_SHARED_LIBRARY ``` Here is a screenshot of my projects' setup. Edit: Maybe the `.classpath` file of my actionbarsherlocktest project helps ... ``` <?xml version="1.0" encoding="UTF-8"?> <classpath> <classpathentry kind="src" path="src"/> <classpathentry kind="src" path="gen"/> <classpathentry kind="con" path="com.android.ide.eclipse.adt.ANDROID_FRAMEWORK"/> <classpathentry kind="con" path="com.android.ide.eclipse.adt.LIBRARIES"/> <classpathentry kind="lib" path="libs/actionbarsherlock-plugin-maps-4.1.0.jar"/> <classpathentry kind="output" path="bin/classes"/> </classpath> ``` The `.classpath` file of the library project looks exactly the same. Solution to the `INSTALL_FAILED_MISSING_SHARED_LIBRARY` error message. For some reasons Eclipse always started the emulator that was configured for API level 7 but without the Google API. I could not manage to force it to pick the "map-enabled" emulator. After I deleted the "map-less" emulator the application launched successfully. Do you know how this can happen? Summary: Finally, I got it running. Here are some experiences I like to share. - Download the latest version of ActionBarSherlock from the website. - Do not clone the repository in order to checkout the 4.1.0 tag (9598f2b). It did not work for me. - Setup the ActionBarSherlock library project in Eclipse. - Update the contained `action-support-v4.jar` to the latest version. - Add the `actionbarsherlock-plugin-map-x.y.z.jar` to the `libs` folder of the library project. - You do not need to add it to the build path of the library project. - Setup your main project and add the library project as a dependency. - You do not need to add the `action-support-v4.jar` or the `actionbarsherlock-plugin-map-x.y.z.jar` to your main project. It is also not necessary to add any of the .jar files to the build path of the main project. - A simple and helpful example to follow is available in the repository.