Flutter FutureBuilder calling function continuously - flutter

Question

I have simple function which is calling data from firestore and filtering data. But issue is my futurebuilder keeps on loader situation (Data is called successfully i can see in console but now showing in future) I think its because my fucntion is calling in loop or something i have try to print something in my function which indicates me that my function is not stopping and thats why i think my futureBuilder keeps on loading.
My code
Future<List> getCustomerList() async {
print('calling');
String uUid1 = await storage.read(key: "uUid");
String uName1 = await storage.read(key: "uName");
String uNumber1 = await storage.read(key: "uNumber");
setState(() {
uUid = uUid1;
uName = uName1;
uNumber = uNumber1;
});
CollectionReference _collectionRef =
FirebaseFirestore.instance.collection('Customers');
QuerySnapshot querySnapshot = await _collectionRef.get();
// Get data from docs and convert map to List
List allData = querySnapshot.docs
.where((element) => element['sellerUID'] == uUid)
.map((doc) => doc.data())
.toList();
double gGive = 0;
double gTake = 0;
double gCal = 0;
for (int i = 0; i < allData.length; i++) {
// print(allData[i]);
// print('give ${double.parse(allData[i]['give'].toString()) }');
// print('take ${double.parse(allData[i]['take'].toString()) }');
double.parse(allData[i]['give'].toString()) -
double.parse(allData[i]['take'].toString()) >
0
? gGive += double.parse(allData[i]['give'].toString()) -
double.parse(allData[i]['take'].toString())
: gTake += double.parse(allData[i]['give'].toString()) -
double.parse(allData[i]['take'].toString());
}
// print(gGive);
// print(gTake);
setState(() {
Gtake = gGive.toString().replaceAll("-", "");
Ggive = gTake.toString().replaceAll("-", "");
});
if (greenBox) {
var check = allData.where((i) => i['take'] > i['give']).toList();
return check;
} else if (redBox) {
var check = allData.where((i) => i['give'] > 1).toList();
return check;
} else {
return allData;
}
}
And my futureBuilder look like this
Expanded(
child: Container(
height: Height * 0.5,
child: FutureBuilder(
future: getCustomerList(),
builder: (context, snapshot) {
if (snapshot.hasData) {
list = snapshot.data;
return SingleChildScrollView(
child: Column(
children: [
Container(
height: Height * 0.5,
child: ListView.builder(
shrinkWrap: true,
itemCount: list.length,
itemBuilder:
(BuildContext context,
int index) {
var showThis = list[index]
['give'] -
list[index]['take'];
return list[index]
['customerName']
.toString()
.contains(searchString)
? GestureDetector(
onTap: () {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) =>
CustomerData(
data: list[
index])),
);
},
child: Padding(
padding:
const EdgeInsets
.only(
left: 13,
right: 13),
child: Container(
decoration:
BoxDecoration(
border: Border(
top: BorderSide(
color: Colors
.grey,
width:
.5)),
),
child: Padding(
padding:
const EdgeInsets
.all(
13.0),
child: Row(
mainAxisAlignment:
MainAxisAlignment
.spaceBetween,
children: [
Row(
children: [
CircleAvatar(
child:
Text(
list[index]['customerName'][0]
.toString(),
style:
TextStyle(fontFamily: 'PoppinsBold'),
),
backgroundColor:
Color(0xffF7F9F9),
),
SizedBox(
width:
20,
),
Text(
list[index]['customerName']
.toString(),
style: TextStyle(
fontFamily:
'PoppinsMedium'),
),
],
),
Text(
'RS ${showThis.toString().replaceAll("-", "")}',
style: TextStyle(
fontFamily:
'PoppinsMedium',
color: list[index]['give'] - list[index]['take'] <
0
? Colors.green
: Colors.red),
),
],
),
),
),
),
)
: Container();
},
),
)
],
),
);
} else
return Center(
heightFactor: 1,
widthFactor: 1,
child: SizedBox(
height: 70,
width: 70,
child: CircularProgressIndicator(
strokeWidth: 2.5,
),
),
);
}),
),
),
I am damn sure its because futurebuilder keeps calling function which is returning data but because of keeps calling functions my Futurebuilder keeps showing loading.

Answer 1

You should not call setState inside the future that you are giving to the FutureBuilder.
The state actualization will cause the FutureBuilder to re-build. Meaning triggering the future again, and ... infinite loop !