how to Prevent Future Builder form multiple callings - flutter

Question

I use from Future Builder to get some of my needed data like images for my listview but the getimage functaion called multiple times, how coud i prevent it?
the getimage functaion is called from build i know its wrong but i must pass the carUserId to function and i cant pass it if i call get image
outside the build so what shoud i do?
i called getimage function in initState but it didn't solve my problem in this way the images are not appears at all
heare is my code
my getimage function
Future<String> getimage(carUserId) async {
var res = await carobj.getAdData(carUserId);
return (res.data() as Map)['imgPro'].toString();
}
I get image heare:
child: FutureBuilder<String>(
future: _imageFuture,
builder: (context, AsyncSnapshot<String> snapshot) {
if (snapshot.data == null) {
return Container(
width: 60,
height: 60,
decoration: BoxDecoration(
shape: BoxShape.circle,
image: DecorationImage(
image: NetworkImage(
"https://miro.medium.com/max/1200/1*mk1-6aYaf_Bes1E3Imhc0A.jpeg",
scale: 0.9),
fit: BoxFit.fill)),
);
} else {
String usersImg = snapshot.data.toString();
return Container(
width: 60,
height: 60,
decoration: BoxDecoration(
shape: BoxShape.circle,
image: DecorationImage(
image: NetworkImage(
usersImg != null
? (usersImg)
: ("https://miro.medium.com/max/1200/1*mk1-6aYaf_Bes1E3Imhc0A.jpeg"),
scale: 0.9),
fit: BoxFit.fill)),
);
}
}),
my list widget:
Widget build(BuildContext context) {
Widget? showCarsList() {
if (cars != null) {
return ListView.builder(
itemCount: cars!.docs.length,
padding: EdgeInsets.all(8),
itemBuilder: (context, index) {
carUserId = (cars!.docs[index].data() as Map)['uId'];
_mFuture = getNumber();
_imageFuture = getimage(carUserId);
return Card(
child: Column(
children: [
ListTile(
leading: GestureDetector(
onTap: () {},
child: FutureBuilder<String>(
future: _imageFuture,
builder: (context, AsyncSnapshot<String> snapshot) {
if (snapshot.data == null) {
return Container(
width: 60,
height: 60,
decoration: BoxDecoration(
shape: BoxShape.circle,
image: DecorationImage(
image: NetworkImage(
"https://miro.medium.com/max/1200/1*mk1-6aYaf_Bes1E3Imhc0A.jpeg",
scale: 0.9),
fit: BoxFit.fill)),
);
} else {
String usersImg = snapshot.data.toString();
return Container(
width: 60,
height: 60,
decoration: BoxDecoration(
shape: BoxShape.circle,
image: DecorationImage(
image: NetworkImage(
usersImg != null
? (usersImg)
: ("https://miro.medium.com/max/1200/1*mk1-6aYaf_Bes1E3Imhc0A.jpeg"),
scale: 0.9),
fit: BoxFit.fill)),
);
}
}),
),
title: GestureDetector(
onTap: () {},
child: Text((cars!.docs[index].data() as Map)['username']
.toString()),
),
subtitle: GestureDetector(
onTap: () {},
child: Row(
children: [
((cars!.docs[index].data() as Map)['carLocation'] !=
null)
? Text(
(cars!.docs[index].data()
as Map)['carLocation'],
style: TextStyle(
color: Colors.black.withOpacity(0.6)))
: Text("unknown",
style: TextStyle(
color: Colors.black.withOpacity(0.6))),
SizedBox(
width: 4.0,
),
Icon(
Icons.location_pin,
color: Colors.grey,
)
],
),
),
trailing: (cars!.docs[index].data() as Map)['uId'] == userId
? Row(
mainAxisSize: MainAxisSize.min,
children: [
GestureDetector(
onTap: () {},
child: Icon(Icons.edit),
),
SizedBox(
width: 20,
),
GestureDetector(
onDoubleTap: () {},
child: Icon(Icons.delete_forever),
),
],
)
: Row(
mainAxisSize: MainAxisSize.min,
children: [],
),
),
Padding(
padding: EdgeInsets.all(16),
child: Image.network((cars!.docs[index].data() as Map)['urlImage']!=null
? ((cars!.docs[index].data() as Map)['urlImage'].toString()): ("https://miro.medium.com/max/1200/1*mk1-6aYaf_Bes1E3Imhc0A.jpeg"),
fit: BoxFit.fill,
),
),
Padding(
padding: EdgeInsets.only(left: 10),
child: Text('\$'+(cars!.docs[index].data() as Map)['carPrice'].toString()
,style:TextStyle(fontFamily: "oleo",letterSpacing: 2,
fontSize: 24) ,
),
),
Padding(padding: EdgeInsets.only(left: 15,right: 15),
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: [
Row(
children: [
Icon(Icons.directions_car),
Padding(padding: EdgeInsets.only(left: 10),
child: Align(
child: Text((cars!.docs[index].data() as Map)['carModel'].toString(),
),
alignment: Alignment.topLeft,
),
)
],
),
Row(
children: [
Icon(Icons.watch_later_outlined),
Padding(padding: EdgeInsets.only(left: 10),
child: Align(
child: Text(tAgo.format((cars!.docs[index].data() as Map)['time'].toDate()),
),
alignment: Alignment.topLeft,
),
),
],
),
],),
),
SizedBox(height: 10,),
Padding(padding: EdgeInsets.only(left: 15,right: 15,bottom: 10),
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: [
Row(
children: [
Icon(Icons.brush_outlined),
Padding(padding: EdgeInsets.only(left: 10),
child: Align(
child: Text((cars!.docs[index].data() as Map)['carColor'].toString()),
alignment: Alignment.topLeft,
),
),
],
),
FutureBuilder( future: _mFuture,
builder: (context, AsyncSnapshot snapshot){
if (snapshot.hasData) {
String userNumbers = snapshot.data.toString();
return Row(
children: [
Icon(Icons.phone_android),
Padding(padding: EdgeInsets.only(left: 10),
child: Align(
child: Text(userNumbers.toString()),
alignment: Alignment.topLeft,
),
), ],
);
}else{
return Text("loading");
}
}
)
],
),
),
SizedBox(height: 10,),
Padding(padding: EdgeInsets.only(left: 15,right: 15),
child: Text((cars!.docs[index].data() as Map)['description'].toString(),
textAlign: TextAlign.justify,
style: TextStyle(
color: Colors.black.withOpacity(0.8)
),),
),
SizedBox(height: 10,)
],
),
);
},
);
}else{
return Text('Loading.....');
}
}
return Scaffold(
appBar: AppBar(
leading: IconButton(
icon: Icon(Icons.refresh, color: Colors.white),
onPressed: () {},
),
actions: [
TextButton(
onPressed: () {},
child: Padding(
padding: EdgeInsets.all(10),
child: Icon(
Icons.person,
color: Colors.white,
),
)),
TextButton(
onPressed: () {},
child: Padding(
padding: EdgeInsets.all(10),
child: Icon(
Icons.search,
color: Colors.white,
),
)),
TextButton(
onPressed: () {},
child: Padding(
padding: EdgeInsets.all(10),
child: Icon(
Icons.login_outlined,
color: Colors.white,
),
))
],
flexibleSpace: Container(
decoration: BoxDecoration(
gradient: LinearGradient(
colors: [Colors.blueAccent, Colors.redAccent])),
),
title: Text("home page"),
),
body: Center(
child: showCarsList(),
),
floatingActionButton: FloatingActionButton(
tooltip: 'add post',
child: Icon(Icons.add),
onPressed: () {
showDialogForAddingData();
},
),
);
}