尝试使用facebook sdk并想尝试运行示例应用程序profilepicture。请在facebook.developer官方网站上给出配置的所有步骤。虽然导入了facebook sdk，但是有些错误和惊叹标记出现但是这个问题已经解决了。但是在运行简单的app profilepicture时，logcat上会显示一些异常。其中logcat的详细信息有classnotfound异常：
06-10 18:06:48.039: I/Process(621): Sending signal. PID: 621 SIG: 9
06-10 18:08:22.509: W/dalvikvm(697): Unable to resolve superclass of Lcom/facebook/samples/profilepicture/ProfilePictureSampleActivity; (59)
06-10 18:08:22.621: W/dalvikvm(697): Link of class 'Lcom/facebook/samples/profilepicture/ProfilePictureSampleActivity;' failed
06-10 18:08:22.621: D/AndroidRuntime(697): Shutting down VM
06-10 18:08:22.640: W/dalvikvm(697): threadid=1: thread exiting with uncaught exception (group=0x409961f8)
06-10 18:08:22.689: E/AndroidRuntime(697): FATAL EXCEPTION: main
06-10 18:08:22.689: E/AndroidRuntime(697): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.facebook.samples.profilepicture/com.facebook.samples.profilepicture.ProfilePictureSampleActivity}: java.lang.ClassNotFoundException: com.facebook.samples.profilepicture.ProfilePictureSampleActivity
06-10 18:08:22.689: E/AndroidRuntime(697): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1879)
06-10 18:08:22.689: E/AndroidRuntime(697): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1980)
06-10 18:08:22.689: E/AndroidRuntime(697): at android.app.ActivityThread.access$600(ActivityThread.java:122)
06-10 18:08:22.689: E/AndroidRuntime(697): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1146)
06-10 18:08:22.689: E/AndroidRuntime(697): at android.os.Handler.dispatchMessage(Handler.java:99)
06-10 18:08:22.689: E/AndroidRuntime(697): at android.os.Looper.loop(Looper.java:137)
06-10 18:08:22.689: E/AndroidRuntime(697): at android.app.ActivityThread.main(ActivityThread.java:4340)
06-10 18:08:22.689: E/AndroidRuntime(697): at java.lang.reflect.Method.invokeNative(Native Method)
06-10 18:08:22.689: E/AndroidRuntime(697): at java.lang.reflect.Method.invoke(Method.java:511)
06-10 18:08:22.689: E/AndroidRuntime(697): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
06-10 18:08:22.689: E/AndroidRuntime(697): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
06-10 18:08:22.689: E/AndroidRuntime(697): at dalvik.system.NativeStart.main(Native Method)
06-10 18:08:22.689: E/AndroidRuntime(697): Caused by: java.lang.ClassNotFoundException: com.facebook.samples.profilepicture.ProfilePictureSampleActivity
06-10 18:08:22.689: E/AndroidRuntime(697): at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:61)
06-10 18:08:22.689: E/AndroidRuntime(697): at java.lang.ClassLoader.loadClass(ClassLoader.java:501)
06-10 18:08:22.689: E/AndroidRuntime(697): at java.lang.ClassLoader.loadClass(ClassLoader.java:461)
06-10 18:08:22.689: E/AndroidRuntime(697): at android.app.Instrumentation.newActivity(Instrumentation.java:1023)
06-10 18:08:22.689: E/AndroidRuntime(697): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1870)
06-10 18:08:22.689: E/AndroidRuntime(697): ... 11 more
所以任何人都可以告诉我这个例外的解决方案是什么。这个例子来自facebook sdk.Thanks随附的每个示例应用程序。