發送Facebook用戶數據到服務器失敗 - Android

Question

我有一個Facebook登錄（4.2）的應用程序，當用戶登錄時，我將他的數據（姓名，生日等）傳遞到我的MySql聯機數據庫。我的問題是，在一些設備上，我得到空字符串，我不明白爲什麼？

用戶數據在onCompleted（）方法發送到服務器，內部onSucces（）被保存到偏好後：

public class SplashActivity extends Activity { 

    private LoginButton loginButton; 
    CallbackManager callbackManager; 
    private Editor editor; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     getWindow().requestFeature(Window.FEATURE_ACTION_BAR); 
     getActionBar().hide(); 
     setContentView(R.layout.splash); 

     FacebookSdk.sdkInitialize(getApplicationContext()); 
     callbackManager = CallbackManager.Factory.create(); 

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

     editor = this.getSharedPreferences("UserInfo", Context.MODE_PRIVATE).edit(); 

     isLoggedIn(); 


     if (isLoggedIn()) { 
      loginButton.setVisibility(View.GONE); 
      new CountDownTimer(3000, 5000) { 
       public void onTick(long millisUntilFinished) { 
       } 

       public void onFinish() { 
        finish(); 
       } 

      }.start(); 
     } else { 

     } 


     // Callback registration 
     loginButton.registerCallback(callbackManager, 
       new FacebookCallback<LoginResult>() { 
        @Override 
        public void onSuccess(LoginResult loginResult) { 
         // App code 
         GraphRequest request = GraphRequest.newMeRequest(
           loginResult.getAccessToken(), 
           new GraphRequest.GraphJSONObjectCallback() {         
            @Override 
            public void onCompleted(JSONObject object, GraphResponse response) {           
             try { 

              String id = (String) object.get("id"); 
              String name = (String) object.get("name"); 
              String email = (String) object.get("email"); 
              String birthday = (String) object.get("birthday"); 

              editor.putString("id", id); 
              editor.putString("name", name); 
              editor.putString("email", email); 
              editor.putString("birthday", birthday); 

              editor.commit(); 

              SendUserInfo sender = new SendUserInfo(getApplication()); 
              sender.sendUserInfo(); 

             } catch (JSONException e) {           
              e.printStackTrace(); 
             } 

            } 
           }); 
         Bundle parameters = new Bundle(); 
         parameters.putString("fields", "id,name, email, gender, birthday"); 
         request.setParameters(parameters); 
         request.executeAsync(); 

         finish(); 
        } 

        @Override 
        public void onCancel() { 
         // App code 
        } 

        @Override 
        public void onError(FacebookException exception) { 
         Toast.makeText(getApplication(), 
           "Va rugam sa incercati mai tarziu.", 
           Toast.LENGTH_LONG).show(); 
        } 
       }); 

    } 

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

    public boolean isLoggedIn() { 
     AccessToken accessToken = AccessToken.getCurrentAccessToken(); 
     return accessToken != null; 
    } 

} 

類上傳數據：

public class SendUserInfo { 

    Context context; 
    private int refCode; 

    public SendUserInfo(Context context) { 
     this.context = context; 
    } 

public void sendUserInfo() { 

     SharedPreferences preferences = context.getSharedPreferences("UserInfo", 
       Context.MODE_PRIVATE); 
     String regId = preferences.getString("userRegId", null); 
     String id = preferences.getString("id", "null"); 
     String name = preferences.getString("name", null); 
     String email = preferences.getString("email", null); 
     String birthday = preferences.getString("birthday", null); 


     Random r = new Random(); 
     refCode = r.nextInt(9000 - 6000) + 456;  


     final int DEFAULT_TIMEOUT = 10000; 
     AsyncHttpClient client = new AsyncHttpClient(); 
     client.setTimeout(DEFAULT_TIMEOUT); 

     RequestParams params = new RequestParams();  
     params.put("regId", regId); 
     params.put("fbId", id); 
     params.put("name", name); 
     params.put("email", email); 
     params.put("birthday", birthday); 
     params.put("refCode", String.valueOf(refCode)); 



     client.post("http://www.edmondvarga.com/laborator/save-user-info.php", 
       params, new AsyncHttpResponseHandler() { 

        @Override 
        public void onFailure(int arg0, Header[] arg1, byte[] arg2, 
          Throwable arg3) { 
         sendUserInfo(); 

        } 

        @Override 
        public void onSuccess(int arg0, Header[] arg1, byte[] arg2) { 

        } 
       }); 

    } 


} 

Answer 1

有些用戶可能沒有有效的電子郵件或生日（即使他們給予您許可），所以您始終需要處理空白字段。您將獲得的唯一保證是每位用戶的唯一ID。