CODEWITHSUNDEEP
androidlistview
Dory
Dory

Reputation: 7582

List view back on first position after updating from custom adapter

List view is refreshed every N minutes of interval using a web service call. After refresh my current position goes back to the first item in list view.

Here is my code.

private void updateListUI(String response){

arrList = new ArrayList<Object>(); // to store array list       
Object obj;
obj = some data; // some parsing of data and store in obj instance
arrList.add(obj);
if(listview.getAdapter()==null){
    adapter = new customAdapter(myActivity,layout,arrList);
    listview.setAdapter(adapter);   
}else{
     HeaderViewListAdapter adapterwrap = 
     (HeaderViewListAdapter) listview.getAdapter(); 

     BaseAdapter basadapter = (BaseAdapter) adapterwrap.getWrappedAdapter();
     customAdapter ad = (customAdapter)basadapter;              
     ad.setData(arrList); // it is a func in custom adapter that add items
     ad.notifyDataSetChanged(); 
     // here i want to set the position of list view,as it goes back to first item
 } 
}
BroadcastReceiver serviceReceiver = new BroadcastReceiver() {
 public void onReceive( final Context context, final Intent intent ) {
      updateListUI(intent.getStringExtra(response_from_service));
 }
}

// Intent service calls webservice and broadcast response to receiver as finishes call. My question is on every updateListUI call list view goes back to first position. Is any way to solve this..?

Upvotes: 3

Views: 2350

Answers (4)

Ravi
Ravi

Reputation: 717

use listLead.setSelectionFromTop(index, top); to set the position in list view

Upvotes: 2

Manoj Fegde
Manoj Fegde

Reputation: 4761

Just use the method notifyDataSetChanged() at the point where you want to refresh your list view.

Upvotes: 0

Venkatesh S
Venkatesh S

Reputation: 5492

Instead of loading setAdapter during refresh

use the below code ... it will work 

yourAdapterName.notifyDataSetChanged();

Upvotes: 0

Jens Mombaerts
Jens Mombaerts

Reputation: 101

You can restore the posistion of your ListView using:

int position = 12; // your position in listview
ListView listView = (ListView) findViewById(R.id.listView);
listView.setSelectionFromTop(position, 0);

Upvotes: 2

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