之所以会这样,是因为:
public boolean dispatchContextItemSelected(MenuItem item) {
if (mActive != null) {
for (int i=0; i<mAdded.size(); i++) {
Fragment f = mAdded.get(i);
if (f != null && !f.mHidden) {
if (f.onContextItemSelected(item)) {
return true;
}
}
}
}
return false;
}
如您所见,FragmentManager 为他自己的所有 Fragment 调用 Fragment.onContextItemSelected 直到它返回 true。在您的示例中,我可以提供这样的修复:
public static class TestListFragment extends ListFragment {
private int mNumber = 0;
private ArrayList<String> mItems;
public static TestListFragment newInstance(int number) {
Bundle args = new Bundle();
args.putInt("number", number + 1);
TestListFragment fragment = new TestListFragment();
fragment.setArguments(args);
return fragment;
}
public TestListFragment() {}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mNumber = getArguments().getInt("number");
mItems = new ArrayList<String>();
mItems.add("I am list #" + mNumber);
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
setListAdapter(new ArrayAdapter<String>(getActivity(), android.R.layout.simple_list_item_1, mItems));
registerForContextMenu(getListView());
}
@Override
public void onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo) {
super.onCreateContextMenu(menu, v, menuInfo);
menu.add(mNumber, 0, 0, "Hello, World!");
}
@Override
public boolean onContextItemSelected(MenuItem item) {
if(item.getGroupId() == mNumber){
Log.d("ViewPagerContextMenuBug", "onContextItemSelected called for number " + mNumber);
Toast.makeText(getActivity(), "onContextItemSelected called for number " + mNumber, Toast.LENGTH_SHORT).show();
return true;
}
return false;
}
}