Question

Listener code:

    lvSearch.setOnItemClickListener(new OnItemClickListener() {

        public void onItemClick(AdapterView<?> adapter, View view, int position,
                long id) {
            LinearLayout ll = (LinearLayout) adapter.getChildAt(position);
            TextView tx = (TextView) ll.getChildAt(0);
            TextView tx1 = (TextView) ll.getChildAt(1);
            Log.i("abcValues", tx.getText().toString());

I am getting a NullPointerException while accessing the item values of a ListView. It is working fine for starting item values but not for items that came after scrolling.

Answer 1

getChildAt returns the visible rows and as you scroll the LisView and click the rows you’ll call the method getChildAt for invalid positions(the maximum number you can use with the getChildAt method is the number of visible rows – 1). If you want the parent from the layout of the clicked row, simply use the second parameter arg1 in your code:

public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
                long arg3) {
      LinearLayout ll = (LinearLayout) arg1;
      TextView tx = (TextView) ll.getChildAt(0);
      TextView tx1 = (TextView) ll.getChildAt(1);
      Log.i("abcValues", tx.getText().toString());