ListView scrolling smoothness

Question

I have a fully functional listview (in a ListFragment) with a custom ArrayAdapter. The layout of the adapter consists of an imageview, a button, a gridview and a couple of textviews.
The problem is the listview is very jittery while scrolling. I have implemented the ViewHolder pattern and it improved the performance just a little.
The GridView consists of contact images which i am retrieving in a AsyncTask and also using application cache to display the bitmaps. What else can i do to make this listview scroll smooth?
I have used view recycling as shown below in my getView method of the adapter

public View getView(int position, View convertView, ViewGroup parent) {
    View myView;
    holder = new ViewHolder();
    if (convertView == null) {
        inflater = (LayoutInflater) getContext().getSystemService(
                                  Context.LAYOUT_INFLATER_SERVICE);
        myView = inflater.inflate(R.layout.events_list_activity, parent, false);
    }
    else {
        myView = convertView;
    }
}

Have you correctly recycled the `View`s used in each item of your `ListView`? — btalb, Jan 05 '13 at 09:50
You have a `GridView` in every single row of your `ListView`? If that's the case, then my next guess is that the touch action of scrolling is being delegated to the `GridView` child which makes it jittery. Try turning touch actions off for all of your `GridView`s and see if that helps, then try removing all of the `GridView`s and see if the problem is gone. Without much code, all we can do is take guesses ;) — btalb, Jan 07 '13 at 01:14

score 1 · Answer 1 · edited May 23 '17 at 12:18

1

This question might have explanation for jittery behaviour of your list view.

If you are looking to improve scrolling speed, try this,

getListView().setFastScrollEnabled(true);

edited May 23 '17 at 12:18

Community

1
1

answered Jan 05 '13 at 09:13

Sahil Mahajan Mj

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Nope it doesn't help as i have already taken care of all that. I don't have any heavy operations running on my Adapter. Also `setFastScrollEnabled` is not the solution as the listView will still be jittery while scrolling. – SKen Jan 05 '13 at 09:19

score 0 · Answer 2 · answered Dec 01 '13 at 13:11

0

1.Flatten your ViewItem hierarchy & use merge tag

2.Implement ViewHolder pattern, or use inject feature of androidannotation

3.Do the heavyload in another thread.

answered Dec 01 '13 at 13:11

Truong Nguyen

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GK_ · Answer 3 · 2013-09-11T06:56:53.423

-1

It will give you the scroll from top of your layout and also it'll give you smooth scrolling experience.

mainScrollView=(ScrollView)findViewById(R.id.scrollview);
mainScrollView.smoothScrollTo(0, 0);
mainScrollView.fullScroll(mainScrollView.FOCUS_UP);

edited Sep 11 '13 at 06:56

answered Jan 05 '13 at 09:20

GK_

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yes but my issue is pertaining to a `listview`, how is a `scrollview` going to make any difference? – SKen Jan 05 '13 at 09:26

ListView scrolling smoothness

3 Answers3