Flutter reload Ui after refreshing FutureBuilder - flutter

Question

in this my code, when application couldn't get data from web server, that can be show reload button, after that when i click on reload button, my method can be get data from web server again, my problem is after this action i can't reload UI with this data and reload button is shown always
class _LessonDetailState extends BaseState<LessonDetail> {
String monthKey;
String lessonFileKey;
int monthId;
_LessonDetailState(this.monthKey, this.lessonFileKey,this.monthId);
Future<PlayLessonResponse> _myResponse;
final GlobalKey<RefreshIndicatorState> _refreshIndicatorKey = new GlobalKey<RefreshIndicatorState>();
#override
void initState() {
Future.delayed(Duration.zero,() {
_myResponse = _getLessonDetail(context, monthKey, lessonFileKey);
});
super.initState();
}
#override
Widget build(BuildContext context) {
return Directionality(
textDirection: TextDirection.rtl,
child: Scaffold(
body: FutureBuilder<PlayLessonResponse>(
future: _myResponse,
builder: (context, snapshot) {
if (snapshot.connectionState == ConnectionState.done) {
if(snapshot.hasData){
//...
}else{
return RefreshIndicator(
key: _refreshIndicatorKey,
child: Container(
width: double.infinity,
height: double.infinity,
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
crossAxisAlignment: CrossAxisAlignment.center,
children: <Widget>[
Container(
padding: EdgeInsets.all(15),
child: Text(
'Error',
style: AppTheme.of(context).caption(),
),
),
RaisedButton(
color: Colors.white,
child: Text(
'Reload',
style: AppTheme.of(context).caption(),
),
onPressed: (){
return _getLessonDetail(context, monthKey, lessonFileKey);
},
shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(5.0))),
],
),
),
onRefresh: (){
return _getLessonDetail(context, monthKey, lessonFileKey);
},
);
}
}
return Center(
child: CircularProgressIndicator(),
);
}),
),
);
}
Future<PlayLessonResponse> _getLessonDetail(BuildContext context, String monthKey, String lessonFileKey) async {
try{
//...
return PlayLessonResponse.fromJson(response.body);
}catch(error){
print(error);
return null;
}
}
}

Answer 1

In your onRefresh's _getLessonDetail() function, you should call setState() to rebuild the widget
setState(() {
_myResponse = _getLessonDetail(context, monthKey, lessonFileKey);
});