配置文件在使用Facebook API時返回null

Question

profile.getProfile（）在代碼下運行時返回null。
我正在使用正確的hashkey，正確的應用程序ID。
我在onDestory（）方法中停止配置文件和訪問示蹤器
我沒有使用任何Facebook應用程序 任何想法來解決這個問題。

 @Override 
     public void onCreate(Bundle savedInstane) 
     { 
      super.onCreate(savedInstane); 
      // Add code to print out the key hash 

      FacebookSdk.sdkInitialize(getActivity().getApplicationContext()); 
      callbackManager = CallbackManager.Factory.create(); 
      accessTokenTracker = new AccessTokenTracker() { 
       @Override 
       protected void onCurrentAccessTokenChanged(AccessToken accessToken, AccessToken accessToken1) { 

       } 
      }; 
      profileTracker = new ProfileTracker() { 
       @Override 
       protected void onCurrentProfileChanged(Profile profile, Profile profile1) { 

       } 
      }; 
      accessTokenTracker.startTracking(); 
      profileTracker.startTracking(); 
     } 


    private FacebookCallback<LoginResult> mcallBack = new FacebookCallback<LoginResult>() { 
      @Override 
      public void onSuccess(LoginResult loginResult) { 
       AccessToken token = loginResult.getAccessToken(); 
       Profile profile = Profile.getCurrentProfile(); 
       Uri link = profile.getProfilePictureUri(20, 20); 
       Log.d("Message",link.toString()); 
       display(profile); 
      } 
     }; 


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

void facebookLogin() 
    { 
     FacebookSdk.sdkInitialize(getApplicationContext()); 
     callbackManager = CallbackManager.Factory.create(); 
     setContentView(R.layout.activity_signin); 
     LoginButton login = (LoginButton)findViewById(R.id.login_button_facebook); 
     login.setReadPermissions(Arrays.asList("public_profile", "user_friends")); 
     login.registerCallback(callbackManager, mcallBackFacebook); 
    } 

Answer 1

請按照下列步驟操作：

1. 在你的活動

   @Override 
   protected void onCreate(Bundle savedInstanceState) { 
       super.onCreate(savedInstanceState); 
   
   
       FacebookSdk.sdkInitialize(this.getApplicationContext()); 
   
       callbackManager = CallbackManager.Factory.create(); 
   
   
       LoginManager.getInstance().registerCallback(callbackManager, 
        new FacebookCallback<LoginResult>() { 
         @Override 
         public void onSuccess(LoginResult loginResult) { 
          GraphRequest request = GraphRequest.newMeRequest(
            loginResult.getAccessToken(), 
            new GraphRequest.GraphJSONObjectCallback() { 
             @Override 
             public void onCompleted(
              JSONObject object, 
              GraphResponse response) { 
              // Call service for check facebook auth from server 
              try { 
               mFBID = encodeToBase64("" + object.get("email")); 
               System.out.println("Your facebook is is-----" + mFBID); 
               //YOUR CODE 
              } catch (JSONException e) { 
               e.printStackTrace(); 
              } 
             } 
            }); 
   
          //its will return id, name and email 
          Bundle parameters = new Bundle(); 
          parameters.putString("fields", "id,name,email"); 
          request.setParameters(parameters); 
          request.executeAsync(); 
   
         } 
   
         @Override 
         public void onCancel() { 
          Toast.makeText(LoginActivity.this, "Login Cancel", Toast.LENGTH_LONG).show(); 
         } 
   
         @Override 
         public void onError(FacebookException exception) { 
          Toast.makeText(LoginActivity.this, exception.getMessage(), Toast.LENGTH_LONG).show(); 
         } 
        }); 
   
   
       setContentView(R.layout.XML); 
   
   } 
   

2. 呼叫在FB按鈕的onclick事件：

   LoginManager.getInstance().logInWithReadPermissions(_activity, Arrays.asList("public_profile", "email", "user_friends")); 
   

3. onActivityResult（ ）

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

4. 獲取hashKey並創建key並在清單文件中註冊FacebookActivity。

試試吧..這裏