CODEWITHSUNDEEP
androidlistviewandroid-arrayadapter
ASP
ASP

Reputation: 1974

List view back to top postion after updating data in arrayadapter

I have a listview that refreshed every 5 secs, using a XML parsing. After refreshing, the current position of the list go back to first position. Is there any possible ways to solve this?

Upvotes: 5

Views: 7249

Answers (4)

yfsx
yfsx

Reputation: 1986

try this

adapter.notifyDataSetChanged();

Upvotes: -1

Salmaan
Salmaan

Reputation: 3624

This code will help you out....

// get position of listview
int index = listView.getFirstVisiblePosition();
View v = listView.getChildAt(0);
int top = (v == null) ? 0 : v.getTop();

// notify dataset changed or re-assign adapter here

//re-assign the position of listview after setting the adapter again
listView.setSelectionFromTop(index, top);

Cheers :)

Upvotes: 2

flo
flo

Reputation: 2018

By using setAdapter() to update a list Android resets the position. Try altering the Adapter instead.

I don't know which adapter you're using so here two examples.

ArrayAdapter

adapter = list.getAdapter();
if (adapter == null) {
    // Create new adapter + list.setAdapter()
} else {
    adapter.clear();
    adapter.addAll(newData);
    adapter.notify(notifyDataSetChanged());
}

CursorAdapter

adapter.changeCursor(newCursor);

Upvotes: 5

Akhil
Akhil

Reputation: 14038

Use lv.smoothScrollToPosition(pos) where pos could be any int, preferably the length of the adapter, if you want the listview to autoscroll to the last added entry as it is refreshed.

public void smoothScrollToPosition (int position) 


Smoothly scroll to the specified adapter position. The view will scroll such that the indicated position is displayed.

Upvotes: 3

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