Google Maps Android API v2 - Sample Code crashes

Question

I'm trying to get the sample code of Android 'Google Maps Android API v2' working. I get the project built without errors. However, when I try to run the app on my Galaxy Nexus (connected with usb to my laptop), the app crashes immediately.

• I filled in my own Maps API Key at the AndroidManifest.xml
• I built against Android 4.1.2

This is the logging:

Unable to resolve superclass of Lcom/example/mapdemo/BasicMapActivity; (66)  Link of class 'Lcom/example/mapdemo/BasicMapActivity;' failed  Could not find class 'com.example.mapdemo.BasicMapActivity', referenced from method com.example.mapdemo.MainActivity.<clinit>  VFY: unable to resolve const-class 108 (Lcom/example/mapdemo/BasicMapActivity;) in Lcom/example/mapdemo/MainActivity;  VFY: replacing opcode 0x1c at 0x000d  Exception Ljava/lang/NoClassDefFoundError; thrown while initializing Lcom/example/mapdemo/MainActivity;  Class init failed in newInstance call (Lcom/example/mapdemo/MainActivity;)  Shutting down VM  threadid=1: thread exiting with uncaught exception (group=0x41ac9930)  FATAL EXCEPTION: main  java.lang.ExceptionInInitializerError at java.lang.Class.newInstanceImpl(Native Method) at java.lang.Class.newInstance(Class.java:1319) at android.app.Instrumentation.newActivity(Instrumentation.java:1054) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2097) 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:5039) 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.NoClassDefFoundError: com.example.mapdemo.BasicMapActivity at com.example.mapdemo.MainActivity.<clinit>(MainActivity.java:97) ... 15 more 

Does anybody have a hint how to solve this or what I might be doing wrong?

Answer 1

Follow the crib sheet very, very carefully:
https://docs.google.com/document/pub?id=19nQzvKP-CVLd7_VrpwnHfl-AE9fjbJySowONZZtNHzw

In particular, I think you need to:

• Import the actual source for the "google-play-services_lib" project and link it as an Android library.
  • Do this through Project -> Properties -> Android -> Library, Add -> google-play-services_lib (you can right click on your project and choose Properties, then select Android).
  • Do not add it as a dependent Project through the "Java Build Path" for your project, that didn't work for me.
• Add the google-play-services.jar and android-support-v4.jar into a "libs" folder in the sample project, and add them as "External External JARs" in "Build Path -> Configure Build Path -> Libraries".

I found this second step was necessary as I was hitting the exact same error as you when trying to use the sample code. The first step was necessary to avoid a NoClassDefFoundError in com.google.android.gms.R$styleable in my real project.

I also needed to do a Clean build and Uninstall the app from the device (from an earlier test attempt) before the sample code worked.

Answer 2

Follow next sample code instructions by google.

Skip on "4" section, and follow below instructions:

• Add new folder to your project named "libs"

• Copy google-play-services.jar form:

  "android-sdk-folder\extras\google\google_play_services\libproject\google-play-services_lib\libs"

  to "libs" folder --> right click on this jar in this folder --> Build path --> Add to build path.

• Copy android-support-v4.jar form:

  "android-sdk-folder\extras\android\support\v4"

  to "libs" folder --> right click on this jar in this folder --> Build path --> Add to build path.

Where "android-sdk-folder" usually looks like: "C:\Users\User_Name\android-sdks"