从onListItemClick更改“TextView”的文本

Question

从类的onListItemClick ListFragment方法更改TextView的文本。 这是该方法：

@Override 
    public void onListItemClick(ListView l, View v, int position, long id) { 

     String selectedValue = (String) getListAdapter().getItem(position); 

     Descripcion_Noticias myDetailFragment = new Descripcion_Noticias(); 

      FragmentTransaction fragmentTransaction = 
        getActivity().getFragmentManager().beginTransaction(); 

     myDetailFragment.setText(v,selectedValue); 

     fragmentTransaction.replace(R.id.fragment, myDetailFragment); 
     fragmentTransaction.addToBackStack(null); 
      fragmentTransaction.commit(); 


    } 

XML是：

在XML是在新的片段，延伸片段。

---

的XML：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:orientation="vertical" android:layout_width="match_parent" 
    android:layout_height="match_parent"> 


    <TextView 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:text="New Text" 
     android:id="@+id/ss" 
     android:layout_gravity="center_horizontal" /> 
</LinearLayout> 

ListFragment的方法：

@Override 
    public void onListItemClick(ListView l, View v, int position, long id) { 

     String selectedValue = (String) getListAdapter().getItem(position); 
     CharSequence s =selectedValue; 
     TextView t = (TextView) getActivity().findViewById(R.id.ss); 
     t.setText(s); 

     Descripcion_Noticias myDetailFragment = new Descripcion_Noticias(); 

      FragmentTransaction fragmentTransaction = 
        getActivity().getFragmentManager().beginTransaction(); 

     fragmentTransaction.replace(R.id.fragment, myDetailFragment); 
     fragmentTransaction.addToBackStack(null); 
      fragmentTransaction.commit(); 


    } 

The class primary of XMl: 

@Override 
    public View onCreateView(LayoutInflater inflater, ViewGroup container, 
          Bundle savedInstanceState) { 
     View v = inflater.inflate(R.layout.descripcion_noticias, null); 
     return v; 

    } 

---

方法：

@Override 
public void onListItemClick(ListView l, View v, int position, long id) { 

    String selectedValue = (String) getListAdapter().getItem(position); 
    CharSequence s =selectedValue; 
    mTextView.setText(s); 

    Descripcion_Noticias myDetailFragment = new Descripcion_Noticias(); 

    FragmentTransaction fragmentTransaction = 
      getActivity().getFragmentManager().beginTransaction(); 

    fragmentTransaction.replace(R.id.fragment, myDetailFragment); 
    fragmentTransaction.addToBackStack(null); 
    fragmentTransaction.commit(); 

} 

}

类片段：

public View onCreateView(LayoutInflater inflater, ViewGroup container, 
         Bundle savedInstanceState) { 
    View v = inflater.inflate(R.layout.descripcion_noticias, null); 
    mTextView = (TextView) getActivity().findViewById (R.id.ss); 
    return v; 

} 

的三三两两类有private TextView mTextView;

Answer 1

里面的onCreateView方法，保存的全局引用您的TextView：

mTextView = (TextView) v.findViewById(R.id.ss); 

，然后访问它您的onListItemClick为：

mTextView.setText(s); 

编辑

在类的顶部，你就把：

private TextView mTextView; 

在你的监听方法：

@Override 
public void onListItemClick(ListView l, View v, int position, long id) { 

    String selectedValue = (String) getListAdapter().getItem(position); 
    CharSequence s =selectedValue; 
    mTextView.setText(s); 

    Descripcion_Noticias myDetailFragment = new Descripcion_Noticias(); 

     FragmentTransaction fragmentTransaction = 
       getActivity().getFragmentManager().beginTransaction(); 

    fragmentTransaction.replace(R.id.fragment, myDetailFragment); 
    fragmentTransaction.addToBackStack(null); 
     fragmentTransaction.commit(); 


} 

的XML类初级：

@Override 
public View onCreateView(LayoutInflater inflater, ViewGroup container, 
          Bundle savedInstanceState) { 
    View v = inflater.inflate(R.layout.descripcion_noticias, null); 
    mTextView = (TextView)v.findViewById(R.id.ss); 
    return v; 

}