Infinite Scroll Listview - Setstate() Or Markneedsbuild Called During Build

I'm Creating an infinite scroll listView and i want to change the _loadingState String from 'loading...' to 'loaded' using setState in the _loadNames function, but when _loadNames

Solution 1:

Change _loadNames() {

to

_loadNames(){
   loading = true;
   // setState(() {
     _loadingState = 'loading...';
   // });

and

     onRefresh: (){
       _loadNames();
       returnnull;
     },

to

onRefresh: (){
       setState(() =>_loadNames());
     },

update

_loadNames(){
   loading = true;

   newFuture.delayed(Duration.zero, () =>setState(() {
     _loadingState = 'loading...';
   }));