Question

我已将android sdk集成到我的android工作室项目中，但app force在我运行应用程序后立即关闭。设计器中有jsonexception错误，我使用过com.facebook.login.widget.LoginButton，但它只是一个设计器错误。

错误日志：

> 04-17 19:29:35.996  24734-24734/com.example.bandhan.myapplication1
> E/AndroidRuntime﹕ FATAL EXCEPTION: main
>     Process: com.example.bandhan.myapplication1, PID: 24734
>     java.lang.ExceptionInInitializerError
>             at java.lang.reflect.Constructor.newInstance(Native Method)
>             at java.lang.reflect.Constructor.newInstance(Constructor.java:288)
>             at android.view.LayoutInflater.createView(LayoutInflater.java:614)
>             at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:750)
>             at android.view.LayoutInflater.rInflate(LayoutInflater.java:813)
>             at android.view.LayoutInflater.inflate(LayoutInflater.java:511)
>             at android.view.LayoutInflater.inflate(LayoutInflater.java:415)
>             at android.view.LayoutInflater.inflate(LayoutInflater.java:366)
>             at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:435)
>             at android.app.Activity.setContentView(Activity.java:2267)
>             at com.example.bandhan.myapplication1.Share_Activity.onCreate(Share_Activity.java:15)
>             at android.app.Activity.performCreate(Activity.java:6289)
>             at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1119)
>             at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2646)
>             at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2760)
>             at android.app.ActivityThread.access$900(ActivityThread.java:177)
>             at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1448)
>             at android.os.Handler.dispatchMessage(Handler.java:102)
>             at android.os.Looper.loop(Looper.java:145)
>             at android.app.ActivityThread.main(ActivityThread.java:5944)
>             at java.lang.reflect.Method.invoke(Native Method)
>             at java.lang.reflect.Method.invoke(Method.java:372)
>             at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1389)
>             at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1184)
>      Caused by: null
>             at com.facebook.internal.Validate.sdkInitialized(Validate.java:99)
>             at com.facebook.FacebookSdk.getCallbackRequestCodeOffset(FacebookSdk.java:735)
>             at com.facebook.internal.CallbackManagerImpl$RequestCodeOffset.toRequestCode(CallbackManagerImpl.java:109)
>             at com.facebook.login.widget.LoginButton.<clinit>(LoginButton.java:58)
>             at java.lang.reflect.Constructor.newInstance(Native Method)
>             at java.lang.reflect.Constructor.newInstance(Constructor.java:288)
>             at android.view.LayoutInflater.createView(LayoutInflater.java:614)
>             at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:750)
>             at android.view.LayoutInflater.rInflate(LayoutInflater.java:813)
>             at android.view.LayoutInflater.inflate(LayoutInflater.java:511)
>             at android.view.LayoutInflater.inflate(LayoutInflater.java:415)
>             at android.view.LayoutInflater.inflate(LayoutInflater.java:366)
>             at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:435)
>             at android.app.Activity.setContentView(Activity.java:2267)
>             at com.example.bandhan.myapplication1.Share_Activity.onCreate(Share_Activity.java:15)
>             at android.app.Activity.performCreate(Activity.java:6289)
>             at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1119)
>             at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2646)
>             at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2760)
>             at android.app.ActivityThread.access$900(ActivityThread.java:177)
>             at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1448)
>             at android.os.Handler.dispatchMessage(Handler.java:102)
>             at android.os.Looper.loop(Looper.java:145)
>             at android.app.ActivityThread.main(ActivityThread.java:5944)
>             at java.lang.reflect.Method.invoke(Native Method)
>             at java.lang.reflect.Method.invoke(Method.java:372)
>             at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1389)
>             at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1184)

请帮我解决问题。谢谢。

Answer 1

如果您查看Facebook Validate课程中的第99行，您会发现它正在投掷FacebookSdkNotInitializedException

您需要在加载FacebookSdk.sdkInitialize(Context)之前致电LoginButton（即致电setContentView()）

所以，在Activity的{{1}}方法中

onCreate

任何时候您都要使用Facebook组件，您需要确保SDK已初始化。

另外，请确保在清单中有Facebook应用程序ID的元数据键，否则当您尝试实际按下public void onCreate(Bundle savedInstance){ super.onCreate(savedInstance); FacebookSdk.sdkInitialize(getApplicationContext()); setContentView(R.layout.my_layout); // Now you can set the layout with the LoginButton }时，您将遇到另一个问题。

Answer 2

老实说，这个解决方案不是万无一失的。

即使我在setContentView（）之前调用了初始化代码，我仍然会收到该异常的报告。

您可以做的是添加if条件以确保Facebook已完成初始化。

if（FacebookSdk.isInitialized（））//在此处邀请您的应用

app forcecloses开始facebook活动

2 个答案: