How to reload a FutureBuilder in Flutter? - flutter

Question

I have a FutureBuilder here :
FutureBuilder<List<Task>>(
future:
getTasks(),
builder: (BuildContext context, AsyncSnapshot<List<Task>> snapshot){
if(snapshot.hasError){
return const Text('Erreur');
}
if(snapshot.hasData){
return ListView(
shrinkWrap: true,
physics: NeverScrollableScrollPhysics(),
children: taskList.map((e) => TaskContainer(
task: e
)).toList(),
);
}
return const Center(child: CircularProgressIndicator());
}
)
Which return a list of tasks as colored block container in a calendar as shown below :
The problem is whenever I navigate to another month in the calendar, the FutureBuilder is fetching the again fetching the data from the webservice, which duplicate the tasks every time I change months :
Here is the code of my functions to navigate between months :
_toPreviousMonth(){
setState(() {
datess.clear();
dayss.clear();
startMonth = new DateTime(startMonth.year, startMonth.month - 1, 1);
});
}
_toNextMonth(){
setState(() {
datess.clear();
dayss.clear();
startMonth = new DateTime(startMonth.year, startMonth.month + 1, 1);
});
}
Actually I don't mind the FutureBuilder fetching the data when I change month, because the final goal would be to display tasks from the selected day.
But what I would like is to have a way to suppress the containers build from the previous fetch as I navigate between months,
Thanks for helping :)

Answer 1

Your code is not showing how you are using snapshot in your FututrBuilder??
I suspect you are adding the tasks directly to a list everytime you re-build using setState( ).
Solution: reset your tasks list at the beginning of the buid( ) method
#override Widget build(BuildContext context) {
yourTaskList = [] //if an array or adjust if other type