StreamBuilder inside the ListviewBuilder not scrolling - flutter

Question

Problem: I am beginner for flutter developing. I tried to get data from firestore and display it. But scrolling listview didn't respond to one finger so I had to use more than one. How to solve this problem.
body: StreamBuilder(
stream: _firebase_auth.collection("ContactData").snapshots(),
builder: (BuildContext context, snapshot) {
if (snapshot.hasData) {
return ListView.builder(
itemCount: snapshot.data.docs.length,
itemExtent: 100.0,
itemBuilder: (context, index) {
DocumentSnapshot data = snapshot.data.docs[index];
return Card(
child: ListView(padding: EdgeInsets.all(8.0), children: [
Text('sds'),
Text('sds'),
Text('sds'),
Text('sds'),
Text('sds'),
]),
);
});
} else {
return Text('Loading Data.....');
}
},
),

Answer 1

you should wrap streamBuilder with the SingleChild scroll view or use shrinkWrap: true,physics: ScrollPhysics(),
body: StreamBuilder(
stream: _firebase_auth.collection("ContactData").snapshots(),
builder: (BuildContext context, snapshot) {
if (snapshot.hasData) {
return ListView.builder(
shrinkWrap: true,
physics: ScrollPhysics(),
itemCount: snapshot.data.docs.length,
itemExtent: 100.0,
itemBuilder: (context, index) {
DocumentSnapshot data = snapshot.data.docs[index];
return Card(
child: ListView(padding: EdgeInsets.all(8.0), children: [
Text('sds'),
Text('sds'),
Text('sds'),
Text('sds'),
Text('sds'),
]),
);
});
} else {
return Text('Loading Data.....');
}
},
),

Answer 2

add this line in listView.builder
physics: AlwaysScrollableScrollPhysics(),

Answer 3

Wrap stream builder with SingleChildScrolView.
This will make the screen a scrollable element.
Set physics of ListView.builder to NeverScrollablePhysics.
This will prevent the scrolling of the parent ListView.Builder, but it's okay because it's parent, SingleChildScrollView is
scrollable.
Set physics of ListView to Scrollable
If you want to, not sure if you want to scroll these items or just display.