Java 致命异常主-应用程序在启动时崩溃

当我运行我的应用程序时，我得到了这个错误，我应该如何修复这个错误，任何想法都将受到赞赏

03-11 18:15:35.795: E/AndroidRuntime(5588): FATAL EXCEPTION: main
03-11 18:15:35.795: E/AndroidRuntime(5588): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.my_autrui/com.example.my_autrui.Login}: android.view.InflateException: Binary XML file line #64: Error inflating class com.facebook.widget.LoginButton
03-11 18:15:35.795: E/AndroidRuntime(5588):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2306)
03-11 18:15:35.795: E/AndroidRuntime(5588):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2356)
03-11 18:15:35.795: E/AndroidRuntime(5588):     at android.app.ActivityThread.access$600(ActivityThread.java:150)
03-11 18:15:35.795: E/AndroidRuntime(5588):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1244)
03-11 18:15:35.795: E/AndroidRuntime(5588):     at android.os.Handler.dispatchMessage(Handler.java:99)
03-11 18:15:35.795: E/AndroidRuntime(5588):     at android.os.Looper.loop(Looper.java:137)
03-11 18:15:35.795: E/AndroidRuntime(5588):     at android.app.ActivityThread.main(ActivityThread.java:5195)
03-11 18:15:35.795: E/AndroidRuntime(5588):     at java.lang.reflect.Method.invokeNative(Native Method)
03-11 18:15:35.795: E/AndroidRuntime(5588):     at java.lang.reflect.Method.invoke(Method.java:511)
03-11 18:15:35.795: E/AndroidRuntime(5588):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:795)
03-11 18:15:35.795: E/AndroidRuntime(5588):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:562)
03-11 18:15:35.795: E/AndroidRuntime(5588):     at dalvik.system.NativeStart.main(Native Method)
03-11 18:15:35.795: E/AndroidRuntime(5588): Caused by: android.view.InflateException: Binary XML file line #64: Error inflating class com.facebook.widget.LoginButton
03-11 18:15:35.795: E/AndroidRuntime(5588):     at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:698)
03-11 18:15:35.795: E/AndroidRuntime(5588):     at android.view.LayoutInflater.rInflate(LayoutInflater.java:746)
03-11 18:15:35.795: E/AndroidRuntime(5588):     at android.view.LayoutInflater.inflate(LayoutInflater.java:489)
03-11 18:15:35.795: E/AndroidRuntime(5588):     at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
03-11 18:15:35.795: E/AndroidRuntime(5588):     at android.view.LayoutInflater.inflate(LayoutInflater.java:352)
03-11 18:15:35.795: E/AndroidRuntime(5588):     at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:282)
03-11 18:15:35.795: E/AndroidRuntime(5588):     at android.app.Activity.setContentView(Activity.java:1881)
03-11 18:15:35.795: E/AndroidRuntime(5588):     at com.example.my_autrui.Login.onCreate(Login.java:26)
03-11 18:15:35.795: E/AndroidRuntime(5588):     at android.app.Activity.performCreate(Activity.java:5104)
03-11 18:15:35.795: E/AndroidRuntime(5588):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080)
03-11 18:15:35.795: E/AndroidRuntime(5588):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2260)
03-11 18:15:35.795: E/AndroidRuntime(5588):     ... 11 more
03-11 18:15:35.795: E/AndroidRuntime(5588): Caused by: java.lang.ClassNotFoundException: Didn't find class "com.facebook.widget.LoginButton" on path: /data/app/com.example.my_autrui-1.apk
03-11 18:15:35.795: E/AndroidRuntime(5588):     at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:65)
03-11 18:15:35.795: E/AndroidRuntime(5588):     at java.lang.ClassLoader.loadClass(ClassLoader.java:501)
03-11 18:15:35.795: E/AndroidRuntime(5588):     at java.lang.ClassLoader.loadClass(ClassLoader.java:461)
03-11 18:15:35.795: E/AndroidRuntime(5588):     at android.view.LayoutInflater.createView(LayoutInflater.java:552)
03-11 18:15:35.795: E/AndroidRuntime(5588):     at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:687)

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从日志中可以看出，LoginButton类似乎不可用，该类应位于com.facebook.widget包下：

原因：java.lang.ClassNotFoundException:未找到类 路径上的“com.facebook.widget.LoginButton”： /data/app/com.example.my_autrui-1.apk

您正在使用第三方库吗？您需要将其作为依赖项添加，并确保在导出库时也打包了该库

要添加对第三方的依赖关系，请右键单击项目并选择属性->Java构建路径->库选项卡。

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要检查库是否正在导出，请在同一窗口中选中“顺序和导出”选项卡。确保添加并选择要导出的Android私有库

问题是按钮的包名

请查看此处的评论：

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看看这个：

ClassNotFoundException:在路径上找不到类“com.facebook.widget.LoginButton:

这值得一个“Hello world”示例作为答案。。。你可以展示你的代码吗？你想让我发布哪些文件？实际上我刚刚删除了Facebook按钮代码，应用程序开始工作。但无论如何，谢谢你。