從主活動發送包到片段

Question

我跟着谷歌教程，並沒有得到我的代碼中的任何錯誤，但由於某種原因，我的包中的數據似乎並沒有從我的主要活動發送到我的片段（我的應用程序只是不斷返回「0.00」）。請幫忙。

主要活動：

@Override 
public void assignButtonBWHW1Clicked(String assignButtonBWHWClicked) { 

    if (assignButtonBWHWClicked.equals(assignButtonBWHWClicked)) { 

     assignFragment1 = new assignFragment1(); 
     buttonsGeneric = new genericBackNextFragment(); 

     splitItFragmentManager3 = getFragmentManager(); 
     splitItFragmentTransaction3 = splitItFragmentManager3.beginTransaction(); 
     splitItFragmentTransaction3.replace(R.id.fragment_container, assignFragment1); 

     splitItFragmentTransaction3.replace(R.id.fragment_container_2, buttonsGeneric); 
     splitItFragmentTransaction3.addToBackStack(null); 

     splitItFragmentTransaction3.commit(); 

     Bundle bundleAssign = new Bundle(); 
     bundleAssign.putDouble("price1", 22); 
     assignFragment1.setArguments(bundleAssign); 

    } 
} 

片斷：

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

    assignFragment1View = inflater.inflate(R.layout.assign_fragment_1, container, false); 

    item1 = (TextView) assignFragment1View.findViewById(R.id.assign1_food_item_1); 
    item2 = (TextView) assignFragment1View.findViewById(R.id.assign1_food_item_2); 
    priceItem1 = (TextView) assignFragment1View.findViewById(R.id.assign1_price_item_1); 
    priceItem2 = (TextView) assignFragment1View.findViewById(R.id.assign1_price_item_2); 

    Bundle bundleAssign = this.getArguments(); 
    Double price1Double = bundleAssign.getDouble("priceItem1", 0.00); 
    priceItem1.setText(String.valueOf(price1Double)); 

    return assignFragment1View; 
} 

Answer 1

剛剛更新的fragment側key從priceItem1到price1。

Double price1Double = bundleAssign.getDouble("priceItem1", 0.00); 

到

Double price1Double = bundleAssign.getDouble("price1", 0.00); 

爲了讓事情發生clear.this因爲您正在使用單獨的按鍵，同時增加數據包中，使用不同的關鍵字進行檢索。所以它正在返回default value，即0.00那priceItem1密鑰

Answer 2

嘗試

Bundle bundleAssign = getArguments(); 

或者，
Bundle bundleAssign = getActivity().getArguments()

在

Bundle bundleAssign = this.getArguments(); 

獲得價值代替像

double result = bundleAssign.getDouble("price1"); 

Answer 3

嘗試把包初始化到片段你片段nmanager之前。

if (assignButtonBWHWClicked.equals(assignButtonBWHWClicked)) { 

    assignFragment1 = new assignFragment1(); 
    buttonsGeneric = new genericBackNextFragment(); 

    Bundle bundleAssign = new Bundle(); 
    bundleAssign.putDouble("price1", 22); 
    assignFragment1.setArguments(bundleAssign); 

    splitItFragmentManager3 = getFragmentManager(); 
    splitItFragmentTransaction3 = splitItFragmentManager3.beginTransaction(); 
    splitItFragmentTransaction3.replace(R.id.fragment_container, assignFragment1); 

    splitItFragmentTransaction3.replace(R.id.fragment_container_2, buttonsGeneric); 
    splitItFragmentTransaction3.addToBackStack(null); 

    splitItFragmentTransaction3.commit(); 

} 

Answer 4

兩次更改你將不得不在你的代碼中執行它。
第一個是前交易

if (assignButtonBWHWClicked.equals(assignButtonBWHWClicked)) { 

     assignFragment1 = new assignFragment1(); 
     Bundle bundleAssign = new Bundle(); 
     bundleAssign.putDouble("price1", 22); 
     assignFragment1.setArguments(bundleAssign); 
     buttonsGeneric = new genericBackNextFragment(); 

     splitItFragmentManager3 = getFragmentManager(); 
     splitItFragmentTransaction3 = splitItFragmentManager3.beginTransaction(); 
     splitItFragmentTransaction3.replace(R.id.fragment_container, assignFragment1); 

     splitItFragmentTransaction3.replace(R.id.fragment_container_2, buttonsGeneric); 
     splitItFragmentTransaction3.addToBackStack(null); 

     splitItFragmentTransaction3.commit(); 



    } 

設定的參數，第二個總是使用相同的密鑰對您的包​​內設置和檢索數據的片段，從而改變

Double price1Double = bundleAssign.getDouble("priceItem1", 0.00); 

到

Double price1Double = bundleAssign.getDouble("price1", 0.00);