Display Firestore data as list without using a stream - flutter

Question

I am trying to run a query on my Firebase Firestore data and display the results as a list. Typically, when I do this, I use a streambuilder, which updates the results whenever any data is changed. I was wondering how to display the same data only once, without subscribing to a stream. This is my code for the streambuilder, which updates on change.
StreamBuilder<QuerySnapshot>(
stream: FirebaseFirestore.instance
.collection('announcements')
.orderBy('date', descending: true)
.snapshots(),
builder:
(BuildContext context, AsyncSnapshot<QuerySnapshot> snapshots) {
if (snapshots.connectionState == ConnectionState.active &&
snapshots.hasData) {
return ListView(
shrinkWrap: true,
physics: const BouncingScrollPhysics(),
children: snapshots.data!.size == 0
? [
const Padding(
padding: EdgeInsets.only(top: 10),
child: Text(
"You have no announcements",
style: TextStyle(
height: 1.0,
fontFamily: "urwmedium",
color: Color(0xffD5D6D7),
fontSize: 20,
),
),
),
]
: snapshots.data!.docs.map(
(DocumentSnapshot document) {
Map<String, dynamic> data =
document.data()! as Map<String, dynamic>;
return Text(
data['announcementTitle'],
);
},
).toList(),
);
}
return Center(
child: CircularProgressIndicator(
color: CustomColors.textColor,
),
);
},
),
The above code works, but again, it loads information realtime. What would the code be if I wanted it to only load once at opening?

Answer 1

as the StreamBuilder is helpful in order to get stream of your collection snapshots
to get that data only once, use FutureBuilder instead:
FutureBuilder<QuerySnapshot>(
future: FirebaseFirestore.instance
.collection('announcements')
.orderBy('date', descending: true)
.get(),
builder:
(BuildContext context, AsyncSnapshot<QuerySnapshot> snapshots) {
if (snapshots.connectionState == ConnectionState.done &&
snapshots.hasData) {
return ListView(
shrinkWrap: true,
physics: const BouncingScrollPhysics(),
children: snapshots.data!.size == 0
? [
const Padding(
padding: EdgeInsets.only(top: 10),
child: Text(
"You have no announcements",
style: TextStyle(
height: 1.0,
fontFamily: "urwmedium",
color: Color(0xffD5D6D7),
fontSize: 20,
),
),
),
]
: snapshots.data!.docs.map(
(DocumentSnapshot document) {
Map<String, dynamic> data =
document.data()! as Map<String, dynamic>;
return Text(
data['announcementTitle'],
);
},
).toList(),
);
}
return Center(
child: CircularProgressIndicator(
color: CustomColors.textColor,
),
);
},
),