Android Facebook GraphRequest不返回電子郵件

Question

我查看了有關此問題的幾篇文章，但沒有找到解決方案。

     facebookLoginButton = (LoginButton) findViewById(R.id.facebook_login_button);
        facebookLoginButton.setReadPermissions(Arrays.asList("read_stream", "user_photos", "email", "user_location"));

// create callback manager for facebook
        callbackManager = CallbackManager.Factory.create();

        facebookLoginButton.registerCallback(callbackManager, new FacebookCallback<LoginResult>() {
            @Override
            public void onSuccess(LoginResult loginResult) {
                Log.d(TAG, "LOGGED IN");

                GraphRequest request = GraphRequest.newMeRequest(loginResult.getAccessToken(), new GraphRequest.GraphJSONObjectCallback() {
                    @Override
                    public void onCompleted(JSONObject object, GraphResponse response) {
                        Log.d(TAG, "Facebook graph response: " + response.toString());
                        try {
                            // get only the part before the @ symbol
                            String email_username = object.getString("email").substring(0, object.getString("email").indexOf("@"));
                            editor = preferences.edit();
                            editor.putString("username", email_username);
                            editor.commit();

                            Log.d(TAG, "logging in user " + preferences.getString("username", "") + " with userID: " + preferences.getString("userID", ""));
                            SpinLoginTask spinLoginTask = new SpinLoginTask(LoginActivity.this);
                            spinLoginTask.execute("facebook");
                        } catch (Exception e) {
                            e.printStackTrace();
                        }

                    }
                });
                request.executeAsync();
            }

我收到以下回應：

Facebook graph response: {Response:  responseCode: 200, graphObject: {"name":"Spin Tester","id":"xxxxx"}, error: null}
org.json.JSONException: No value for email

由於我在按鈕上設置了讀取權限以提供所有信息，因此為什么它都不會出現在Graph請求響應中？

Answer 1

試試我一直使用的這段代碼： 編輯

實際上，您需要更改一小部分代碼：

    GraphRequest request = GraphRequest.newMeRequest(loginResult.getAccessToken(), new GraphRequest.GraphJSONObjectCallback() {
        @Override
        public void onCompleted(JSONObject object, GraphResponse response) {
               Log.d(TAG, "Facebook graph response: " + response.toString());
               try {
                      // get only the part before the @ symbol
                      String email_username = object.getString("email").substring(0, object.getString("email").indexOf("@"));
                        editor = preferences.edit();
                        editor.putString("username", email_username);
                        editor.commit();

                        Log.d(TAG, "logging in user " + preferences.getString("username", "") + " with userID: " + preferences.getString("userID", ""));
                        SpinLoginTask spinLoginTask = new SpinLoginTask(LoginActivity.this);
                        spinLoginTask.execute("facebook");
               } catch (Exception e) {
                      e.printStackTrace();
              }

           }
       });

    //ADD THIS LINES PLEASE
    Bundle parameters = new Bundle();
    parameters.putString("fields", "id,name,email");
    request.setParameters(parameters);
    request.executeAsync();
 }

Answer 2

用戶可以選擇在首次登錄時通過Facebook提供的UI拒絕訪問其電子郵件地址。 我將進行檢查以確保電子郵件處於返回的JSON結構中。 如果您需要電子郵件地址，請帶上AlertDialog或其他UI來要求他們提供電子郵件。 確保您有適當的邏輯以防他們拒絕提供電子郵件，因為這總是有可能的。