MapActivity无法启动，求大神帮忙

[Efence]

LOG如下：
11-07 12:31:12.705: E/dalvikvm(3300): Could not find class 'xx.B', referenced from method xx.A.onCreate
11-07 12:31:13.066: E/AndroidRuntime(3300): FATAL EXCEPTION: main
11-07 12:31:13.066: E/AndroidRuntime(3300): java.lang.NoClassDefFoundError: xx.B
11-07 12:31:13.066: E/AndroidRuntime(3300): at xx.A.onCreate(A.java:37)
11-07 12:31:13.066: E/AndroidRuntime(3300): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
11-07 12:31:13.066: E/AndroidRuntime(3300): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1722)
11-07 12:31:13.066: E/AndroidRuntime(3300): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1784)
11-07 12:31:13.066: E/AndroidRuntime(3300): at android.app.ActivityThread.access$1500(ActivityThread.java:123)
11-07 12:31:13.066: E/AndroidRuntime(3300): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:939)
11-07 12:31:13.066: E/AndroidRuntime(3300): at android.os.Handler.dispatchMessage(Handler.java:99)
11-07 12:31:13.066: E/AndroidRuntime(3300): at android.os.Looper.loop(Looper.java:130)
11-07 12:31:13.066: E/AndroidRuntime(3300): at android.app.ActivityThread.main(ActivityThread.java:3835)
11-07 12:31:13.066: E/AndroidRuntime(3300): at java.lang.reflect.Method.invokeNative(Native Method)
11-07 12:31:13.066: E/AndroidRuntime(3300): at java.lang.reflect.Method.invoke(Method.java:507)
11-07 12:31:13.066: E/AndroidRuntime(3300): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:864)
11-07 12:31:13.066: E/AndroidRuntime(3300): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:622)
11-07 12:31:13.066: E/AndroidRuntime(3300): at dalvik.system.NativeStart.main(Native Method)


其中B为继承MapActivity的类，在A中以Intent跳转，结果报错，找不到类B

[tangfei_honesty]

你要创建程序选着Google APIs(Google Inc.)

[不简单de]

有没有在Manifest里注册这个类？

[jgszhuzhu]

Could not find class 'xx.B', referenced from method xx.A.onCreate 没注册的问题

[greenjia0]

同意路上的观点

[ldoublem]

找不到类，你可以clear下项目

[Efence]

终于找着原因了，是手机没有地图库，被阉割过