How to select an ListView item after long click?
Solution 1
It's possible, but just barely... I actually don't know how such a simple thing can wind up so ridiculously complicated.
The key to the answer can be found here: Android: keep blue background after ListView selection
What this boils down to is to define an additional style that is used by the ListView
and setting the choice mode to AbsListView.CHOICE_MODE_SINGLE
(as explained in the linked answer).
This allows you programmatically toggle the selection using Listview.setItemChecked()
. However, you need to keep track of the index of the touched item in the onItemLongClick
callback yourself, because ListView.setSelection()
won't do that (at least ListView.getSelectedItem()
will always return -1 as far as I can see).
Code (for simplicity, my fragment implements all three OnItemClickListener
, OnItemLongClickListener
, and
ActionMode.Callback
):
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
{
this.listViewAdapter = new ListViewAdapter();
this.root = (ListView)inflater.inflate(R.layout.fragment_bookmarks, container, false);
this.root.setAdapter(this.listViewAdapter);
this.root.setOnItemClickListener(this);
this.root.setOnItemLongClickListener(this);
this.root.setChoiceMode(AbsListView.CHOICE_MODE_SINGLE);
return this.root;
}
@Override
public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id) {
if(this.cabMode != null)
return false;
this.selectedPosition = position;
this.root.setItemChecked(position, true);
this.root.setOnItemClickListener(null);
this.cabMode = getActivity().startActionMode(this);
return true;
}
And finally, if you want to get rid of the selection when the CAB is closed:
@Override
public void onDestroyActionMode(ActionMode mode) {
cabMode = null;
this.root.setItemChecked(this.selectedPosition, false);
this.selectedPosition = -1;
this.root.setOnItemClickListener(this);
}
Registering and unregistering the OnItemClickListener
makes sure that while the CAB is active you won't accidentally trigger the action usually associated with the item (like opening a detail view).
Solution 2
My solution:(trick)
final ListView lvMain = (ListView) activity.findViewById(R.id.listTHEMES);
lvMain.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
lvMain.setItemsCanFocus(false);
ArrayAdapter<String> adapter = new ArrayAdapter<String>(activity,
android.R.layout.simple_list_item_multiple_choice, ArrayTheme);
lvMain.setAdapter(adapter);
lvMain.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
@Override
public boolean onItemLongClick(AdapterView<?> arg0, View arg1,
int pos, long id) {
// TODO Auto-generated method stub
if (lvMain.isItemChecked(pos)){lvMain.setItemChecked(pos,false);}else{lvMain.setItemChecked(pos,true);}
Log.v(LOG_TAG,"long clicked pos: " + pos);
//lvMain.setSelection();
return true;
}
});
lvMain.setOnItemClickListener(new AdapterView.OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
//Log.d(LOG_TAG, "itemClick: position = " + position + ", id = " + id);
if (lvMain.isItemChecked(position)){lvMain.setItemChecked(position,false);}else{lvMain.setItemChecked(position,true);}
}
});
Chris
I'm a Senior UX Designer and Agile Facilitator at Volkswagen, helping to transition one of the worlds largest industrial manufactures into a digital future.
Updated on April 01, 2020Comments
-
Chris about 4 years
I've got a silly little problem. I've registered a
ListFragment
both asOnItemClickListener
andOnItemLongClickListener
of its ownListView
.When the
onItemClick
event is called, an intent for the detail view activity of that item is started, no problems there.When the
onItemLongClick
event happens, I want to accomplish the following things:- Create a CAB
- Keep the long-pressed item selected
Code:
@Override public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id) { if(this.cabMode != null) return false; this.cabMode = getActivity().startActionMode(editModeCallback); view.setSelected(true); return true; }
The CAB will show, however, the selection won't stay with the item.
Some bits and pieces, in case they are relevant: I've read about fixing this issue with calls to
view.requestFocusFromTouch()
or usinglistView.setItemChecked()
, but that didn't work for me. Also, the views for the list items are instanced from a custom layout, but don't have any custom event listeners attached.Any help is appreciated. Thx!
-
stormin986 over 10 yearsChris, note you don't actually need to track the index of the selected item(s). If in choiceMode="singleChoice", use AbsListView.getCheckedItemPosition(). If in choiceMode="multipleChoice", use AbsListView.getCheckedItemPositions() to get the set of checked items. (Note this method is also valid for a single choice mode, but the other method is much simpler.
-
Chris over 10 yearsOh, thanks for the info! I was too fixated on
ListView.getSelectedItem()
:-)