如何使用Android中的包在活动之间传递数据片段

Question

我可以将值存储在一个变量中。现在我想的是变量传递到片段 用下面的代码，我能够加载片段：

public class AndroidListFragmentActivity extends Activity { 
    Fragment2 f2; 
    public static String itemname; 
    /** Called when the activity is first created. */ 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.apetiserfragement); 
     itemname=getIntent().getStringExtra("itemname"); 
     Bundle args=new Bundle(); 
     args.putString("itemname", itemname); 
     f2=new Fragment2(); 
     f2.setArguments(args); 
    } 
} /* (Here I load fragment using xml page) itemname */ 

输出被分裂成2个窗口中的一个用于延长listfragment（对于列表视图），一个用于片段。

Fragment2.xml

public class Fragment2 extends Fragment { 
    String itemname; 

    @Override 
    public View onCreateView(LayoutInflater inflater, ViewGroup container, 
    Bundle savedInstanceState) { 
     // TODO Auto-generated method stub 
     System.out.println(getArguments().getString("itemname")); 

     return inflater.inflate(R.layout.fragment2, container, false); 
    } 

    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     // TODO Auto-generated method stub 
     super.onCreate(savedInstanceState); 
    } 
} 

AndroidListFragmentActivity在这个类ITEMNAME我想通过Fragment2.class ..请帮我

Answer 1

如果两个片段是在其他活动，则可以使用意图

如果然后可以对该特定活动进行操作

如在此link

看到类TitlesFragment的onListItemClick

** 
    * Helper function to show the details of a selected item, either by 
    * displaying a fragment in-place in the current UI, or starting a 
    * whole new activity in which it is displayed. 
    */ 
    void showDetails(int index) { 
     mCurCheckPosition = index; 

     if (mDualPane) {//<---------------------f on same activity then can do operation on that particular fragment 
      // We can display everything in-place with fragments, so update 
      // the list to highlight the selected item and show the data. 
      getListView().setItemChecked(index, true); 

      // Check what fragment is currently shown, replace if needed. 
      DetailsFragment details = (DetailsFragment) //<------------------------see use getFragmentManager 
        getFragmentManager().findFragmentById(R.id.details); 
      if (details == null || details.getShownIndex() != index) { 
       // Make new fragment to show this selection. 
       details = DetailsFragment.newInstance(index); 

       // Execute a transaction, replacing any existing fragment 
       // with this one inside the frame. 
       FragmentTransaction ft = getFragmentManager().beginTransaction(); 
       ft.replace(R.id.details, details); 
       ft.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE); 
       ft.commit(); 
      } 

     } else { //<----------If both fragment are on other activity then can use intent 
      // Otherwise we need to launch a new activity to display 
      // the dialog fragment with selected text. 
      Intent intent = new Intent(); 
      intent.setClass(getActivity(), DetailsActivity.class); 
      intent.putExtra("index", index); 
      startActivity(intent); 
     } 

Answer 2

在这里看到这样的响应：data sharing between fragments and activity in android