Error connecting android app to Google Cloud Endpoints: could not find class

问题

I have built an API with Google Cloud Endpoints and I am trying to connect to it writing an Android application. I followed the following tutorial:

https://developers.google.com/appengine/docs/java/endpoints/consume_android

So, I added the content of the jar on my "src" folder, I copied the listed libraries to lib and I added the code. When I tried to start the application, it crashed with the following error:

        02-26 12:19:52.874: E/dalvikvm(17558): Could not find class 
    'com.google.api.services.utenteendpoint.Utenteendpoint$Builder', referenced from method 
    com.example.androidgcetest.MainActivity.onCreate


 02-26 12:19:53.004: E/AndroidRuntime(17558): FATAL EXCEPTION: main
02-26 12:19:53.004: E/AndroidRuntime(17558): java.lang.NoClassDefFoundError: com.google.api.services.utenteendpoint.Utenteendpoint$Builder
02-26 12:19:53.004: E/AndroidRuntime(17558):    at com.example.androidgcetest.MainActivity.onCreate(MainActivity.java:22)
02-26 12:19:53.004: E/AndroidRuntime(17558):    at android.app.Activity.performCreate(Activity.java:4465)
02-26 12:19:53.004: E/AndroidRuntime(17558):    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)
02-26 12:19:53.004: E/AndroidRuntime(17558):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1931)
02-26 12:19:53.004: E/AndroidRuntime(17558):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1992)
02-26 12:19:53.004: E/AndroidRuntime(17558):    at android.app.ActivityThread.access$600(ActivityThread.java:127)
02-26 12:19:53.004: E/AndroidRuntime(17558):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1158)
02-26 12:19:53.004: E/AndroidRuntime(17558):    at android.os.Handler.dispatchMessage(Handler.java:99)
02-26 12:19:53.004: E/AndroidRuntime(17558):    at android.os.Looper.loop(Looper.java:137)
02-26 12:19:53.004: E/AndroidRuntime(17558):    at android.app.ActivityThread.main(ActivityThread.java:4448)
02-26 12:19:53.004: E/AndroidRuntime(17558):    at java.lang.reflect.Method.invokeNative(Native Method)
02-26 12:19:53.004: E/AndroidRuntime(17558):    at java.lang.reflect.Method.invoke(Method.java:511)
02-26 12:19:53.004: E/AndroidRuntime(17558):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:823)
02-26 12:19:53.004: E/AndroidRuntime(17558):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:590)
02-26 12:19:53.004: E/AndroidRuntime(17558):    at dalvik.system.NativeStart.main(Native Method)

Do you know the possible cause of this error?

EDIT: I also found this before the log reported above

02-26 16:51:57.780: W/dalvikvm(1230): Unable to resolve superclass of Lcom/google/api/services/utenteendpoint/Utenteendpoint$Builder; (20)
02-26 16:51:57.780: W/dalvikvm(1230): Link of class 'Lcom/google/api/services/utenteendpoint/Utenteendpoint$Builder;' failed

回答1:

Add the sources.jar file also to libs folder of your android project, just like the other jar files.

Thanks Raffo for finding the typo error in my earlier post

来源：https://stackoverflow.com/questions/15088110/error-connecting-android-app-to-google-cloud-endpoints-could-not-find-class