Android Google map routing help

I am developing a Android Google map app using Google 2.3 API. I googled around and tried this But while testing the application i got exception. Here's is the full stack-trace

FATAL EXCEPTION: main
09-05 16:16:05.914: ERROR/AndroidRuntime(405): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.som.routing/com.som.routing.GmaproutingtryActivity}: java.lang.ClassNotFoundException: com.som.routing.G开发者_如何学编程maproutingtryActivity in loader dalvik.system.PathClassLoader[/data/app/com.som.routing-2.apk]
09-05 16:16:05.914: ERROR/AndroidRuntime(405):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1569)
09-05 16:16:05.914: ERROR/AndroidRuntime(405):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663)
09-05 16:16:05.914: ERROR/AndroidRuntime(405):     at android.app.ActivityThread.access$1500(ActivityThread.java:117)
09-05 16:16:05.914: ERROR/AndroidRuntime(405):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931)
09-05 16:16:05.914: ERROR/AndroidRuntime(405):     at android.os.Handler.dispatchMessage(Handler.java:99)
09-05 16:16:05.914: ERROR/AndroidRuntime(405):     at android.os.Looper.loop(Looper.java:130)
09-05 16:16:05.914: ERROR/AndroidRuntime(405):     at android.app.ActivityThread.main(ActivityThread.java:3683)
09-05 16:16:05.914: ERROR/AndroidRuntime(405):     at java.lang.reflect.Method.invokeNative(Native Method)
09-05 16:16:05.914: ERROR/AndroidRuntime(405):     at java.lang.reflect.Method.invoke(Method.java:507)
09-05 16:16:05.914: ERROR/AndroidRuntime(405):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
09-05 16:16:05.914: ERROR/AndroidRuntime(405):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
09-05 16:16:05.914: ERROR/AndroidRuntime(405):     at dalvik.system.NativeStart.main(Native Method)
09-05 16:16:05.914: ERROR/AndroidRuntime(405): Caused by: java.lang.ClassNotFoundException: com.som.routing.GmaproutingtryActivity in loader dalvik.system.PathClassLoader[/data/app/com.som.routing-2.apk]
09-05 16:16:05.914: ERROR/AndroidRuntime(405):     at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:240)
09-05 16:16:05.914: ERROR/AndroidRuntime(405):     at java.lang.ClassLoader.loadClass(ClassLoader.java:551)
09-05 16:16:05.914: ERROR/AndroidRuntime(405):     at java.lang.ClassLoader.loadClass(ClassLoader.java:511)
09-05 16:16:05.914: ERROR/AndroidRuntime(405):     at android.app.Instrumentation.newActivity(Instrumentation.java:1021)
09-05 16:16:05.914: ERROR/AndroidRuntime(405):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1561)
09-05 16:16:05.914: ERROR/AndroidRuntime(405):     ... 11 more

Anyone gone this example please help me out.

Android could not find class com.som.routing.GmaproutingtryActivity. Did you include it (or the lib) in your project?

give the permission in the manifest file like this <uses-library android:name="com.google.android.maps" />. In the manifest tag of the manifest file declare and define the package attribute .If the problem still continues uninstall the apk and reinstall you application.