我是 Android 新手，有一个问题：
我想将最喜欢的 Arraylist 从 FavListFragment 转移到 ApplistFragment。有人可以告诉我该怎么做吗？我尝试使用 Bundle 和 putStringArrayList 传输数据，但这不起作用。我希望有人可以帮助我，我现在正在寻找几个小时。
public class FavListFragment extends ListFragment {
ArrayList<String> list;
ArrayList<String> fav = new ArrayList<String>();
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_main_dummy, container, false);
Button button = (Button) view.findViewById(R.id.button1);
Button button2 = (Button) view.findViewById(R.id.button2);
for(int i = 0; i < 5; i++)
list.add("item" + i);
ArrayAdapter<String> adapter = new ArrayAdapter<String>(
getActivity(), android.R.layout.simple_list_item_1, list);
setListAdapter(adapter);
button.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Activity activity = getActivity();
if (activity != null) {
ArrayAdapter<String> adapter2 = new ArrayAdapter<String>(
getActivity(), android.R.layout.simple_list_item_multiple_choice, list);
setListAdapter(adapter2);
getListView().setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
}
}
});
button2.setOnClickListener(new Button.OnClickListener() {
@Override
public void onClick(View v) {
int cntChoice = getListView().getCount();
SparseBooleanArray sparseBooleanArray = getListView()
.getCheckedItemPositions();
for (int i = 0; i < cntChoice; i++) {
if (sparseBooleanArray.get(i)) {
String selected = "" +
getListView().getItemAtPosition(i).toString();
System.out.println(selected);
fav.add(selected);
}
ArrayAdapter<String> adapter = new ArrayAdapter<String>(
getActivity(), android.R.layout.simple_list_item_1, list);
setListAdapter(adapter);
}
}
});
return view;
}
还有她的另一个片段
public class AppListFragment extends ListFragment {
ArrayList<String> list;
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
}
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_main_dummy, container, false);
ArrayAdapter<String> adapter = new ArrayAdapter<String>(getActivity(),
android.R.layout.simple_list_item_1, list );
setListAdapter(adapter);
return view;
}
这就是我尝试过的：
AppListFragment fr = new AppListFragment();
Bundle value= new Bundle();
value.putStringArrayList("temp1", fav);
fr.setArguments(value);
Bundle bundle=getArguments();
ArrayList <String> myStrings = bundle.getStringArrayList("temp1");