Displaying Firebase Firestore Listview Data as a list Flutter - firebase

Question

I am currently able to display a Listview filled with data from my Firestore database. My current problem is, that I want to make it dissmissable, so I need to be able to use functions such as:
setState(() {
items.removeAt(index);
});
Now, I read up on how to generate a list, but none of the examples mention a firebase Streambuilder like I am using. So I was just wondering if it was possible to make the data into a list? And if not, if there are any other ways to make a firestore listview dissmissable? Here is how I currently get the data:
Container(
child: StreamBuilder(
stream: Firestore.instance.collection('users').snapshots(),
builder: (context, snapshot) {
if (!snapshot.hasData) {
return Center(
child: CircularProgressIndicator(
valueColor: AlwaysStoppedAnimation<Color>(themeColor),
),
);
} else {
return ListView.builder(
scrollDirection: Axis.vertical,
padding: EdgeInsets.all(10.0),
itemBuilder: (context, index) => buildItem(context, snapshot.data.documents[index]),
itemCount: snapshot.data.documents.length,
);
}
},
),
),
Thanks in advance, any help is appreciated.
Builditem looks like this:
Widget buildItem(BuildContext context, DocumentSnapshot document) {
if (document['id'] == currentUserId || document['gender'] == null) {
return Container();
}
if (currentUserPreference == 'male' && currentUserGender == 'male') {
return showGayMales(document);
}
And the ShowGayMales method looks like this:
Widget showGayMales(DocumentSnapshot document) {
if (document['id'] == currentUserId || document['id'] == nopeId || ) {
return Container();
} else {
return Container(
child: Slidable(
delegate: new SlidableScrollDelegate(),
actionExtentRatio: 0.3,
child: Card(
child: Padding(
padding:EdgeInsets.fromLTRB(20.0, 10.0, 25.0, 10.0),
child: Row(
children: <Widget>[
Material(
color: Colors.transparent,
child: Icon(
FontAwesomeIcons.male,
color: textColor,
),
),
new Flexible(
child: Container(
child: new Column(
children: <Widget>[
new Container(
child: Text(
'${document['aboutMe']}',
style: TextStyle(color: textColor, fontSize: 30.0),
),
alignment: Alignment.centerLeft,
margin: new EdgeInsets.fromLTRB(10.0, 0.0, 0.0, 5.0),
),
new Container(
child: Row(
children: <Widget>[
Text(
'-'+'${document['nickname'] ?? 'Not available'}',
style: TextStyle(color: textColor, fontSize: 15.0, fontWeight: FontWeight.bold),
),
Text(
','+' ${document['age'] ?? ''}'
)
],
),
alignment: Alignment.centerLeft,
margin: new EdgeInsets.fromLTRB(10.0, 0.0, 0.0, 0.0),
)
],
),
margin: EdgeInsets.only(left: 20.0),
),
),
],
),
),
shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(10.0)),
),
actions: <Widget>[
new IconSlideAction(
caption: 'Not interested!',
color: errorColor,
icon: Icons.clear,
onTap: () => notinterested('${document['id']}'),
),
],
secondaryActions: <Widget>[
new IconSlideAction(
caption: "Interested!",
color: primaryColor,
icon: Icons.check,
onTap: () => interested('${document['nickname']}', '${document['id']}', '${document['gender']}', '${document['aboutMe']}', '${document['age']}', '${document['preference']}'),
),
],
),
margin: EdgeInsets.only(bottom: 10.0, left: 5.0, right: 5.0),
);
}
}

Answer 1

You can fetch Firestore data and add it to a List by mapping it to an Object first.
List<Users> userList;
Future<void> getUsers() async {
userList = [];
var collection = FirebaseFirestore.instance.collection('users');
collection.get().then((value) {
value.docs.forEach((users) {
debugPrint('get Users ${users.data()}');
setState(() {
// Map users.data to your User object and add it to the List
userList.add(User(User.setUserDetails(users.data())));
});
});
});
}
// Let's say this is User object
class User {
var username;
User(User doc) {
this.username = doc.getUsername();
}
getUsername() => username;
// fetch name using Firestore field name
User.setUserDetails(Map<dynamic, dynamic> doc)
: username = doc['name'];
}