I use below code to update listview.
setListAdapter(MyAdapter);
MyAdapter.notifyDataSetChanged();
getListView().setEmptyView(empty);
But each time update, the list always show top one.
I want to let it only update data, but not focus on top.
How to do it?
Use a ArrayAdapter backed by an ArrayList. To change the data, just update the data in the list and call
MyAdapter.notifyDataSetChanged().
Although you can call notifyDataSetChanged() on SimpleAdapter too.
You need to add listview.setSelection(your_collection.size());. This will make the last item in the ListView as selected when you refresh the ListView. Also call this after refereshing the ListView.
Related
It's easy to remove, add and insert an item from the listview adapter object, but I don't think I see a direct method to update an item in the listview adapter. Obviously, I could simply replace via remove/add, but I want to make sure I'm not missing something obvious.
Right now, I'm simply updating the underlying Item Array and refresh the entire listview by recreating/assigning the adapter (probably also not very elegant).
I hope the question is clear enough.
If you are using ArrayList in adapter class for update In ArrayList there is method called set() which update the item in arraylist after updation call notifyItemchanged() which update an item in listview
Check this link
I have ListView s that keeps messeages of comments. First is message others are comments.
If user send comments It should appear behind of message.It is second row in listview.
When user make a comment I use notifyDataSetChanged().Inserted comments appear in listview but in the last row. I have sorting algorithm that keeps ArrayList what i want in sorting..
Although ArrayList sorted, Inserted comment appear in last row. It should not be.
Why notifyDataSetChanged() don't keep Listview according to ArrayList.It just update it new element to last row
notifyDataSetChanged() will notify data set change to listview, i think you need to modify arraylist and then call notifyDataSetChanged()
In my project i have a ListView for handling the list of a product. In that i have a list of 100 Items in that List view. Each and Every time i have been seeing the first row of the ListView..
If i need to see the data in the ListView Means, i need to scroll down, Can i focus directly to a particular item by any function by passing the position(ID) of the ListView..
For Example this is my ListView that contains 11 items in it..
I'm seeing every time the ListView as the following,..
And my try is, If i give the ListView position as ID=5 means, can i get the Focus of the ListView as follow, in the opening itself...
Can we get this by ListFragment method or anything else?
Suggest me for the Best..
try this, use setselection
listview.setSelection(position);
Don't know about ListFragment but in listview, you can use listview.setSelection(position);
This method will help you to achieve this
for example: listview.setSelection(5);
The situation:
I have an activity with a spinner and a list with a BaseAdapter.
The list is loaded once, and shows correctly... But when I click on the spinner to change the underlying data and call adapter.notifyDataSetChanged(); the list doesn't refresh.
By this I mean that the data is changed and the adapter has the right data, it's just that the listView doesn't change the view.
How to force the listViews to show the right data?
Try adapter.notifyDataSetInvalidated(); as well as adapter.notifyDataSetChanged();
EDIT:
Clear your ArrayList or whatever you're using before you add more items with something like .clear(); and then add the new items and call adapter.notifyDataSetChanged();
Try
myListView.invalidateViews();
How to remove item from a list view? how to reload the list after removal?
Here you can find all the informations.
Anyway you can call
mListAdapter.remove(x); // to remove an item
and
mListAdapter.invalidate(); // to refresh the content
or
mListAdapter.notifyDataSetChanged();
Please, there's no need to write with multiple question marks like that. Removing items from your ListView depends on how you put in the items in the beginning. Edit your question to provide some details on how you did that. Updating your list afterwards can be done with notifyDataSetChanged() called by your ListView adapter.
Remove from the adapter, and the list will refresh automatically.