Question

I’m trying to run cocos2dx sample project (the one created with create-android-project script) on Android device or emulator.

However the application crashes on start with the following errors:

10-16 10:50:02.249: E/AndroidRuntime(379): FATAL EXCEPTION: main 10-16
10:50:02.249: E/AndroidRuntime(379): java.lang.RuntimeException:
Unable to instantiate activity
ComponentInfo{com.geckolab/com.geckolab.mahjong}:
java.lang.ClassNotFoundException: com.geckolab.mahjong in loader
dalvik.system.PathClassLoader[/data/app/com.geckolab-1.apk] 10-16
10:50:02.249: E/AndroidRuntime(379): at
android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2585)
10-16 10:50:02.249: E/AndroidRuntime(379): at
android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
10-16 10:50:02.249: E/AndroidRuntime(379): at
android.app.ActivityThread.access$2300(ActivityThread.java:125) 10-16
10:50:02.249: E/AndroidRuntime(379): at
android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
10-16 10:50:02.249: E/AndroidRuntime(379): at
android.os.Handler.dispatchMessage(Handler.java:99) 10-16
10:50:02.249: E/AndroidRuntime(379): at
android.os.Looper.loop(Looper.java:123) 10-16 10:50:02.249:
E/AndroidRuntime(379): at
android.app.ActivityThread.main(ActivityThread.java:4627) 10-16
10:50:02.249: E/AndroidRuntime(379): at
java.lang.reflect.Method.invokeNative(Native Method) 10-16
10:50:02.249: E/AndroidRuntime(379): at
java.lang.reflect.Method.invoke(Method.java:521) 10-16 10:50:02.249:
E/AndroidRuntime(379): at
com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
10-16 10:50:02.249: E/AndroidRuntime(379): at
com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) 10-16
10:50:02.249: E/AndroidRuntime(379): at
dalvik.system.NativeStart.main(Native Method) 10-16 10:50:02.249:
E/AndroidRuntime(379): Caused by: java.lang.ClassNotFoundException:
com.geckolab.mahjong in loader
dalvik.system.PathClassLoader[/data/app/com.geckolab-1.apk] 10-16
10:50:02.249: E/AndroidRuntime(379): at
dalvik.system.PathClassLoader.findClass(PathClassLoader.java:243)
10-16 10:50:02.249: E/AndroidRuntime(379): at
java.lang.ClassLoader.loadClass(ClassLoader.java:573) 10-16
10:50:02.249: E/AndroidRuntime(379): at
java.lang.ClassLoader.loadClass(ClassLoader.java:532) 10-16
10:50:02.249: E/AndroidRuntime(379): at
android.app.Instrumentation.newActivity(Instrumentation.java:1021)
10-16 10:50:02.249: E/AndroidRuntime(379): at
android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2577)
10-16 10:50:02.249: E/AndroidRuntime(379): … 11 more

Any idea what is going wrong? The build_native.sh script seems to work fine, I resolved some Eclipse errors by changing compiler complience level to 1.6 and adding libcocos2dx.jar to my project’s build path.

Cheers,
Marcin

Answer 1

You must remember to instantiate the activity in AndroidManifest.xml

EDIT : Check your project properties and make sure that all jars or libraries of crocos2d are checked for order and export.