how can move scroll bar automatically?

I am using grid view for display images, I want to scroll开发者_StackOverflow move automatically, whenever I add another images in gridview, is it possible?

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I think you have to read a little bit more :

https://developer.android.com/reference/android/widget/AdapterView.html#setSelection(int)

ListView.setSelection(position);

https://developer.android.com/reference/android/widget/AbsListView.html#smoothScrollToPosition(int)

ListView.smoothScrollToPosition(position).

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Either call setSelection() or use smoothScrollToPosition().

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I got result using GridView.setSelection(GridView.getCount()),so scroll bar automatically move to last element of Grid View

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Use TimerTask to do that since Adapter.notifyDataSetChanged() takes delay to update the grid or list. Code is below:

new Timer().schedule(new TimerTask()
            {
                @Override
                public void run() {         
                    nameHandler.sendEmptyMessage(0);
                }
            },500);
//// And in handler::

Handler nameHandler = new Handler()
    {
        public void handleMessage(Message msg)
        {
            super.handleMessage(msg);
            gridView.setSelection(selectorIndex);
                         // OR
            gridView.smoothScrollToPosition(selectorIndex);
            gridView.invalidate();
        }
    } ;