Android ListView: get data index of visible item

Question

I have an Android ListView created with a SimpleAdapter that has more items in it than fit in the screen. After the list has been scrolled, I need to get the position in the data model of the first visible item in the list.

Basically I want a function like: listView.getChildAt(0).getPositionInDataModel().

Adapter has a few functions in it, like getItemId(position) that looked useful; however, the SimpleAdapter implementation just returns the passed in position, not a row id like I'd hoped.

A brute force solution would be to get the View at index 0, and compare it to the view for each item in the adapter. However, there doesn't seem to be an easy way to get the view for a particular position from the adapter.

Anyone have any thoughts?

Answer 1

It's very easy. Just use ListView.getFirstVisiblePosition() + indexYouWant. For instance, to get the position in the adapter of the 2nd child displayed in the ListView, just use getFirstVisiblePosition() + 1. No need for all the scary stuff shown in the reply above :)

Answer 2

listView.setOnItemClickListener(new OnItemClickListener() {

        public void onItemClick(AdapterView<?> a, View v, int position, long id) {
            // TODO Auto-generated method stub
            //System.out.println("Item is clicked");
            Log.v("ListViewOnClick", "This is clicked..........................");
            Builder abd = new AlertDialog.Builder(ListViewOnClick.this);

            abd.setMessage("" + listView.getItemAtPosition(position));

            abd.show();

        }
    });

we can use this method listView.getItemAtPosition(position) we can get position of list item

Answer 3

listView.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() { public void onItemSelected(AdapterView parent,View view, int pos, long id) { AisleId= parent.getSelectedItemId(); } @Override public void onNothingSelected(AdapterView arg0) { // TODO Auto-generated method stub } }); In this we will get list item Id parent.getSelectedItemId();