Facebook LoginManager回調不叫

Question

我正在使用Facebook的SDK 4.1。我又多了FB登錄按鈕的片段，我設置如下代碼：

@Override 
public View onCreateView(LayoutInflater inflater, ViewGroup container, 
         Bundle savedInstanceState) { 

    View view= inflater.inflate(R.layout.fragment_login, container, false); 

    LoginButton loginButton = (LoginButton) view.findViewById(R.id.login_button); 
    loginButton.setReadPermissions(Arrays.asList("public_profile", "email", 
      "user_birthday", "user_about_me")); 

    loginButton.setFragment(this); 


    return view; 
} 

從那時起，我有這樣的

public class MainActivity extends AppCompatActivity { 

    private CallbackManager callbackManager; 

    private AccessTokenTracker accessTokenTracker; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     FacebookSdk.sdkInitialize(getApplicationContext()); 
     setContentView(R.layout.activity_main); 

     callbackManager = CallbackManager.Factory.create(); 

     LoginManager.getInstance().registerCallback(callbackManager, new FacebookCallback<LoginResult>() { 
      @Override 
      public void onSuccess(LoginResult loginResult) { 
       Log.i("login","success"); 
      } 

      @Override 
      public void onCancel() { 
       Log.i("login","cancel"); 
      } 

      @Override 
      public void onError(FacebookException e) { 
       Log.i("login","error"); 
      } 
     }); 


     accessTokenTracker = new AccessTokenTracker() { 
      @Override 
      protected void onCurrentAccessTokenChanged(
        AccessToken oldAccessToken, 
        AccessToken currentAccessToken) { 
       // App code 
       if(currentAccessToken.isExpired()){ 
        LoginManager.getInstance().logOut(); 
       } 
      } 
     }; 

     AccessToken accessToken=AccessToken.getCurrentAccessToken(); 

     if(accessToken==null||accessToken.isExpired()){ 
      LoginManager.getInstance().logOut(); 
      getSupportFragmentManager().beginTransaction() 
        .replace(R.id.frame_container, new LoginFragment()) 
        .commitAllowingStateLoss(); 
     } 

    } 

    @Override 
    protected void onResume() { 
     super.onResume(); 

    } 


    @Override 
    protected void onActivityResult(int requestCode, int resultCode, Intent data) { 
     super.onActivityResult(requestCode, resultCode, data); 
     callbackManager.onActivityResult(requestCode, resultCode, data); 
    } 

    @Override 
    public boolean onCreateOptionsMenu(Menu menu) { 
     // Inflate the menu; this adds items to the action bar if it is present. 
     getMenuInflater().inflate(R.menu.menu_main, menu); 
     return true; 
    } 

    @Override 
    public boolean onOptionsItemSelected(MenuItem item) { 
     // Handle action bar item clicks here. The action bar will 
     // automatically handle clicks on the Home/Up button, so long 
     // as you specify a parent activity in AndroidManifest.xml. 
     int id = item.getItemId(); 

     //noinspection SimplifiableIfStatement 
     if (id == R.id.action_settings) { 
      return true; 
     } 

     return super.onOptionsItemSelected(item); 
    } 
} 

的proble我的活動是，callbackManager.onActivityResult（requestCode ，resultCode，data）;在onActivityResult方法被調用，但LoginManager.getInstance（）。registerCallback（callbackManager，新FacebookCallback（）...從來沒有被調用。爲什麼會發生這種情況？

Answer 1

我刪除了loginButton.setFragment（this）並正在工作