app forcecloses开始facebook活动

Question

我已经在我的android工作室项目中集成了facebook sdk,但是一旦我运行应用程序,app force就会关闭.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

如果你看看Facebook Validate课程中的第99行,你会发现它正在抛出一个FacebookSdkNotInitializedException

你需要FacebookSdk.sdkInitialize(Context)在LoginButton加载之前打电话(即你的电话setContentView())

所以,用你Activity的onCreate方法:

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
}

无论何时使用Facebook组件,您都需要确保SDK已初始化.

还要确保您的清单中有Facebook应用程序ID的元数据键,否则当您尝试实际按下时,您将遇到另一个问题LoginButton.