Erreur de gonflement de la classe com.facebook.login.widget.LoginButton

Question

J'ai des erreurs qui ne se sont pas manifestées hier, quand j'ai testé.

Ceci est ma partie de l'erreur de chat de journal.

Caused by: The SDK has not been initialized, make sure to call FacebookSdk.sdkInitialize() first. 

                at com.facebook.internal.Validate.sdkInitialized(Validate.java:145) 
                at com.facebook.AccessTokenTracker.<init>(AccessTokenTracker.java:55) 
                at com.facebook.login.widget.LoginButton$2.<init>(LoginButton.java:563) 
                at com.facebook.login.widget.LoginButton.configureButton(LoginButton.java:563) 
                at com.facebook.FacebookButtonBase.<init>(FacebookButtonBase.java:69) 
                at com.facebook.login.widget.LoginButton.<init>(LoginButton.java:201) 
                at java.lang.reflect.Constructor.constructNative(Native Method)  

C'est le login_xml

<com.facebook.login.widget.LoginButton 
     android:id="@+id/loginButton" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_centerHorizontal="true" 
     android:layout_centerVertical="true" 
     android:text=" connect_with_facebook" 
     android:paddingBottom="10dp" 
     android:paddingTop="10dp" /> 

Et c'est le login_activity.class

@Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_log); 



     callbackManager = CallbackManager.Factory.create(); 

     loginButton = (LoginButton) findViewById(R.id.loginButton); 

Answer 1

Vous n'êtes pas initialisé SDK Facebook.

@Override 
     protected void onCreate(Bundle savedInstanceState) { 
      super.onCreate(savedInstanceState); 

      FacebookSdk.sdkInitialize(getApplicationContext()); 
      setContentView(R.layout.activity_log); 

      callbackManager = CallbackManager.Factory.create(); 

      loginButton = (LoginButton) findViewById(R.id.loginButton); 
      }