http://developer.android.com/training/basics/fragments/communicating.html#Deliver http://developer.android.com/training/basics/fragments/communicating.html#Deliver
我相信这就是您想要实现的目标。但我不认为你的行动计划是最好的。
我会在我的片段中创建一个界面，其中的项目将被删除，例如
public class FragmentDeleteItemSharer extends Fragment{
// Interface in Fragment
public interface ShareDeletedItem{
// Interface method you will call from this fragment
public void shareItem(Object deletedItem);
}// end interface
// Instantiate the new Interface Callback
ShareDeletedItem mCallback = null;
// Override the onAttach Method
@Override
public void onAttach(Activity activity){
super.onAttach(activity);
try{
// Attaches the Interface to the Activity
// must add "implements ShareDeletedItem" in your
// Activity or this Exception is thrown
mCallback = (ShareDeletedItem) activity;
}catch(Exception ex){
ex.printStackTrace();
}
}// end onAttach()
// the method which you use to
// remove an item from the current fragment's listview
// where position is from yourlistViewAdapter.getSelectedItemPosition();
public void removeListItem(int position){
// using the item position, get the item in your object array
Object objectToDelete = myObjects[position];
// pass this information to removeItemFromArray
// a method that creates a new object array from the data
Object [] newObjectList = removeItemFromArray(myObjects, objectToDelete);
// Then use the interface callback to tell activity item was deleted
mCallback.shareItem(objectToDelete);
// Call to the method where you update the UI with the Objects
// Are you using an arrayList? Not sure but probably have
// an ArrayList<Objects> myObjects, as reference above
updateUiWithData(newObjectList);
}
}// end this fragment
然后在您的活动中创建一个界面
public class MyActivity extends FragmentActivity implements ShareDeletedItem{
// Interface Object , must attach this interface to Fragment2, when its created
UpdateFragment2 mCallback = null;
// You must attach this interface to your Fragment2, when its created
// you could do so with your view pager, create a method that adds each
// fragment to the view pager, then call a new method like
// addinterface(fragmentReference)
public interface UpdateFragment2{
// method to call in your Fragment that shows queue of deletes
public void addItemtoList(Object newObject);
}
// Interface Callback from the Fragment that deletes an item
public void shareItem(Object deletedItem){
// call the interface method to share the item with the Fragment2
mCallback.addItemToList(deletedItem);
}
}
最后，在 Fragment2 中实现此接口
public class Fragment2 extends Fragment implements UpdateFragment2{
// Interface Method in charge of giving this fragment the deleted item
public void addItemToList(Object deletedItem){
// TODO: Add the Item to the list you currently have
// If the mObjects array is an array list
mObjects.add(mObjects[mObjects.length + 1], deletedItem);
}
}
取决于您如何使用视图寻呼机调用创建片段
try{
// or however you hold reference to the fragment
mCallBack = (UpdateFragment2) Fragment2.class;
}catch(Exception ex){ex.printStackTrace();}
这就是它的全部。希望这可以帮助您理解接口方式是正确的方式。如果没有您的代码，这有点难以提供帮助，但这就是它的完成方式。最难的部分是当您使用视图分页器创建片段时将界面添加到片段中。祝你好运
