Facebook Android SDK 3.0从git导入失败

尝试导入facebook for android 3.0 sdk时引发以下错误：

01-11 15:37:15.394: E/AndroidRuntime(408): FATAL EXCEPTION: main
01-11 15:37:15.394: E/AndroidRuntime(408): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.facebook.samples.hellofacebook/com.facebook.samples.hellofacebook.HelloFacebookSampleActivity}: java.lang.ClassNotFoundException: com.facebook.samples.hellofacebook.HelloFacebookSampleActivity in loader dalvik.system.PathClassLoader[/data/app/com.facebook.samples.hellofacebook-1.apk]
01-11 15:37:15.394: E/AndroidRuntime(408):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1569)
01-11 15:37:15.394: E/AndroidRuntime(408):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663)
01-11 15:37:15.394: E/AndroidRuntime(408):  at android.app.ActivityThread.access$1500(ActivityThread.java:117)
01-11 15:37:15.394: E/AndroidRuntime(408):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931)
01-11 15:37:15.394: E/AndroidRuntime(408):  at android.os.Handler.dispatchMessage(Handler.java:99)
01-11 15:37:15.394: E/AndroidRuntime(408):  at android.os.Looper.loop(Looper.java:130)
01-11 15:37:15.394: E/AndroidRuntime(408):  at android.app.ActivityThread.main(ActivityThread.java:3683)
01-11 15:37:15.394: E/AndroidRuntime(408):  at java.lang.reflect.Method.invokeNative(Native Method)
01-11 15:37:15.394: E/AndroidRuntime(408):  at java.lang.reflect.Method.invoke(Method.java:507)
01-11 15:37:15.394: E/AndroidRuntime(408):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
01-11 15:37:15.394: E/AndroidRuntime(408):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
01-11 15:37:15.394: E/AndroidRuntime(408):  at dalvik.system.NativeStart.main(Native Method)
01-11 15:37:15.394: E/AndroidRuntime(408): Caused by: java.lang.ClassNotFoundException: com.facebook.samples.hellofacebook.HelloFacebookSampleActivity in loader dalvik.system.PathClassLoader[/data/app/com.facebook.samples.hellofacebook-1.apk]
01-11 15:37:15.394: E/AndroidRuntime(408):  at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:240)
01-11 15:37:15.394: E/AndroidRuntime(408):  at java.lang.ClassLoader.loadClass(ClassLoader.java:551)
01-11 15:37:15.394: E/AndroidRuntime(408):  at java.lang.ClassLoader.loadClass(ClassLoader.java:511)
01-11 15:37:15.394: E/AndroidRuntime(408):  at android.app.Instrumentation.newActivity(Instrumentation.java:1021)
01-11 15:37:15.394: E/AndroidRuntime(408):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1561)
01-11 15:37:15.394: E/AndroidRuntime(408):  ... 11 more

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通过git导入失败，原因是项目设置

为了克服错误，右键单击每个示例项目->android工具->添加支持库， 并在同一菜单下修复项目属性

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此外，别忘了将android-support-v4添加到facebook的lib中，以用于project的构建路径设置。

您还可以转到project properties->Java buildpath->order and export并勾选android-support-v4.jar