Listtile Multi-select - Flutter Firestore Streambuilder - flutter

Question

i need help to build a quiz app with flutter,
i use firestore for my data, and i want to add a multi choices question, so when a user tap on one choice, this one is highlighted, like this example
(i use this gif from another question, because i didn't know how to explain)
this is what i have for now
this is my code :
Widget _buildListItem(BuildContext context, DocumentSnapshot document) {
return ListTile(
title: Container(
margin: EdgeInsets.all(8.0),
padding: EdgeInsets.fromLTRB(210, 0.0, 0.0, 0.0),
decoration: BoxDecoration(
color: Colors.white,
border: Border.all(
color: Colors.pink[800], // set border color
width: 3.0), // set border width
borderRadius: BorderRadius.all(
Radius.circular(10.0)), // set rounded corner radius
boxShadow: [
BoxShadow(
blurRadius: 5,
color: Colors.black,
offset: Offset(0.5, 1))
] // make rounded corner of border
),
child: Row(
children: <Widget>[
Container(
child: Text(
document['rep'],
style: TextStyle(
fontSize: 50.0,
color: Colors.black,
),
),
)
]
),
),
onTap: () {
Firestore.instance.runTransaction(
(transaction) async {
DocumentSnapshot freshSnap =
await transaction.get(document.reference);
await transaction.update(freshSnap.reference, {
'votes': freshSnap['votes'] + 1,
});
});
},
);
}
#override
Widget build(BuildContext context) {
return Scaffold(
body: Container(
child: StreamBuilder(
stream: Firestore.instance.collection('questions').snapshots(),
builder: (context, snapshot) {
if (!snapshot.hasData) return const Text('Loading ...');
return ListView.builder(
padding: EdgeInsets.fromLTRB(50.0, 300.0, 50.0, 0.0),
itemExtent: 100.0,
itemCount: snapshot.data.documents.length,
itemBuilder: (context, index) =>
_buildListItem(context, snapshot.data.documents[index]),
);
}),
),
floatingActionButton: FloatingActionButton(
onPressed: () {
Navigator.push(
context, MaterialPageRoute(builder: (context) => new Home()));
},
child: Text("Home"),
),
);
}
thank you so much !

Answer 1

Wrap list tile with colored container :
itemBuilder: (context, index){
return Container(
color: isSelected[index] ? Colors.blue : null,
child: ListTile(title:'test'),
);
}
Change selection status when item is taped.
ListTile(
title: Text('test'),
selected: isSelected[index],
onTap: () {
setState(() {
isSelected[index] = !isSelected[index];
});
},
),
final List<bool> isSelected;
Try it on DartPad