重新加載片段不起作用

Question

我遇到以下情況： NavigationDrawer創建一個片段來處理用戶信息。 onCreateView（）中的片段調用Web服務並返回視圖。當Web服務完成回調時，分離並附加自身的片段。當片段第二次附加onCreateView（）時，應該創建一個包含用戶信息的視圖。但實際上發生的事情是視圖不會改變。

我錯過了什麼？

謝謝你在前進，

片段代碼：

private boolean mIsRefresh = false; 

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

    // Gets Application Context 
    mContext = getActivity().getApplicationContext(); 

    // Set up environment to use DataBase 
    mGlobal = (Global) getActivity().getApplicationContext(); 
    mDAOFactory = mGlobal.getDAOFactory(); 

    mFragment = this; 

    mFragmentView = inflater.inflate(R.layout.fragment_user_info, container, false); 


    buildView(); 

    if (mIsRefresh) { 
     return mFragmentView; 
    }else { 
     return null; 
    } 
} 

這裏是buildView（）代碼：

private void buildView() { 

    mEtUserName = (EditText) mFragmentView.findViewById(R.id.userName); 
    mEtUserEmail = (EditText) mFragmentView.findViewById(R.id.userEmail); 
    mEtPassword = (EditText) mFragmentView.findViewById(R.id.password); 
    mEtPasswordConfirmation = (EditText) mFragmentView.findViewById(R.id.passwordConfirmation); 
    mIbSendPassword = (ImageButton) mFragmentView.findViewById(R.id.sendPassword); 
    mAcUserCountry = (AutoCompleteTextView) mFragmentView.findViewById(R.id.userCountry); 
    mEtUserState = (EditText) mFragmentView.findViewById(R.id.userState); 
    mEtUserCity = (EditText) mFragmentView.findViewById(R.id.userCity); 
    mEtUserPhoneNumberCountry = (EditText) mFragmentView.findViewById(R.id.userPhoneNumberCountry); 
    mEtUserPhoneNumberCity = (EditText) mFragmentView.findViewById(R.id.userPhoneNumberCity); 
    mEtUserPhoneNumber = (EditText) mFragmentView.findViewById(R.id.userPhoneNumber); 
    mCbTCAccepted = (CheckBox) mFragmentView.findViewById(R.id.cbTCAccepted); 


    // User has not been created 
    if (mGlobal.getUserUID() == 0) { 
     getUserEmail(); 
     getUserLocation(); 

    } else { 
     if (mIsRefresh) { 
      formatView(); 
     } else { 
      getDataOnServer(); 
     } 
    } 

} 

這裏就是調用Web服務的代碼：

private void getDataOnServer() { 

    mUserDAO = mDAOFactory.getUserDAO(mContext); 

    final ProgressDialog progressDialog = ProgressDialog.show (getActivity(), 
      getString(R.string.msgConnectingServer), getString(R.string.msgGettingData), true); 

    //TODO Retirar o set abaixo 
    mGlobal.setUserUID(1); 

    mUserDAO.getUserByUID(mGlobal.getUserUID(), new Callback<User>() { 
     @Override 
     public void success(User user, Response response) { 
      mUser = user; 
      mIsRefresh = true; 
      refresh(); 
     } 

     @Override 
     public void failure(RetrofitError error) { 
      mUser = null; 
      Log.e(getClass().getName(), "Retrofit Error = " + error); 
      refresh(); 
     } 

     private void refresh() { 
      progressDialog.dismiss(); 
      FragmentManager fm = getFragmentManager(); 
      FragmentTransaction ft = fm.beginTransaction(); 
      ft.detach(mFragment) 
        .attach(mFragment) 
        .commit(); 

     } 
    }); 
} 

最後，在onStart（）

@Override 
public void onStart() { 
    super.onStart(); 

    if (mIsRefresh) { 
     mIsRefresh = false; 
     getFragmentManager().beginTransaction() 
       .remove(mFragment) 
       .add(R.id.content_frame, mFragment) 
       .commit(); 
    } 

} 

Answer 1

而不是

FragmentManager fm = getFragmentManager(); 
FragmentTransaction ft = fm.beginTransaction(); 
ft.detach(mFragment).attach(mFragment).commit(); 

這樣做：

YourFragment mFragment = getSupportFragmentManager().findFragmentByTag("Your_Fragment_TAG"); //if you are using support library 
    //OR 
    YourFragment mFragment = getFragmentManager().findFragmentByTag("Your_Fragment_TAG"); //if you are using support library 

    FragmentManager fm = getFragmentManager(); 
    FragmentTransaction ft = fm.beginTransaction(); 
    ft.detach(mFragment); 
    ft.attach(mFragment).commit();