问题描述
只是试用一下Facebook的SDK为Android跟着入门指南。完成所有步骤，但是当我导入示例项目偏食，编译失败，出现以下错误：
was just trying out the Facebook SDK for android followed the getting started guide. Completed all the steps, but when I imported the sample projects to eclipse, the compilation failed with the following error:
片段不能被解析为一个类型ProfilePictureSampleFragment.java
Fragment cannot be resolved to a type ProfilePictureSampleFragment.java
然后我加入supportLibrary（从AndroidSDK /演员/安卓/支持/ Android的支持 - v4.jar）作为外部罐子。编译错误不再出现，但是当我尝试运行应用程序，它扔我此异常：
I then added the supportLibrary (from AndroidSDK/extras/android/support/android-support-v4.jar)as an external jar. The compilation error was no longer there, but when I try to run the app, its throwing me this exception:
二月六日至八日：16：18.337：E / AndroidRuntime（856）：致命异常：主要
二月六日至八日：16：18.337：E / AndroidRuntime（856）：了java.lang.RuntimeException：无法实例活动ComponentInfo{com.facebook.samples.profilepicture/com.facebook.samples.profilepicture.ProfilePictureSampleActivity}:抛出java.lang.ClassNotFoundException：com.facebook.samples.profilepicture.ProfilePictureSampleActivity
06-08 02:16:18.337: E/AndroidRuntime(856): FATAL EXCEPTION: main06-08 02:16:18.337: E/AndroidRuntime(856): 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
所有其他PARAMS为默认。我使用的是Mac OS和已登记的关键哈希到我的开发设置。我试图运行ProfilePictureSample应用程序。
All other params are default. I am using a MAC OS and have registered the key hash to my developer settings. I am trying to run the ProfilePictureSample app.
推荐答案
哦..只是得到它的工作。刚走到Java构建路径，并在那里检查Android支持-v4.jar。工作:)
oh.. just got it working. Just went to Java build path and checked android-support-v4.jar in there. Worked :)
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