Why can't I build the list? - flutter

Question

I tried to build a list by taking the data I pulled from the database. But I do not see anything in any way, I get a white screen. I think the data I pulled is overlapping and preventing building lists but I couldn't find where the error is. What I'm trying to do is divide the Card by Row with 2 and write the data I pulled from the database on the left side of the Card. Write other data on the right.
#override
Widget build(BuildContext context) {
return Scaffold(
body: FutureBuilder(
future: _db.getEventsByOrder(widget.index),
builder: (context, snapshot) {
if (snapshot.data == null) {
return Container(
child: Center(child: Text("Loading.....")),
);
} else {
return ListView.builder(
itemCount: snapshot.data.length,
itemBuilder: (BuildContext context, int index) {
return Container(
padding: const EdgeInsets.fromLTRB(8.0, 16.0, 8.0, 16.0),
child: Card(
elevation: 25,
child: Padding(
padding: const EdgeInsets.all(24.0),
child: Row(
children: <Widget>[
Column(
mainAxisSize: MainAxisSize.min,
mainAxisAlignment:
MainAxisAlignment.spaceBetween,
children: <Widget>[
Expanded(
child: Text(
'${snapshot.data[index].title}',
maxLines: 1,
overflow: TextOverflow.ellipsis,
style: TextStyle(
fontSize: 28, fontFamily: 'Arvo'),
)),
Text(
"${snapshot.data[index].date} - ${snapshot.data[index].startTime == "null" ? " Tüm gün" : "${snapshot.data[index].startTime} - ${snapshot.data[index].finishTime}"}",
style: new TextStyle(
fontSize: 15, fontFamily: 'Arvo'),
),
Expanded(
child: Text(snapshot.data[index].desc,
maxLines: 2,
overflow: TextOverflow.ellipsis),
),
]),
Column(
mainAxisSize: MainAxisSize.min,
children: <Widget>[
Container(
child: DropDown(Event(
id: snapshot.data[index].id,
title: snapshot.data[index].title,
date: snapshot.data[index].date,
startTime:
snapshot.data[index].startTime,
finishTime:
snapshot.data[index].finishTime,
desc: snapshot.data[index].desc,
isActive:
snapshot.data[index].isActive,
choice:
snapshot.data[index].choice))),
Container(
padding: EdgeInsets.only(top: 8.0),
height: 100,
width: 100,
decoration: BoxDecoration(
borderRadius: BorderRadius.circular(8.0),
color: Colors.blue),
child: Text(
"${DateTime.parse(snapshot.data[index].date).difference(DateTime.now()).inDays}\nKalan Gün",
textAlign: TextAlign.center,
style: TextStyle(fontSize: 25),
),
),
],
),
],
),
),
),
);
});
}
}),
);
}

Answer 1

You need to adjust the dimensions only.
#override
Widget build(BuildContext context) {
return Scaffold(
body: FutureBuilder(
future: _db.getEventsByOrder(widget.index),
builder: (context, snapshot) {
if (snapshot.data == null) {
return Container(
child: Center(child: Text("Loading.....")),
);
} else {
return ListView.builder(
itemCount: snapshot.data.length,
itemBuilder: (BuildContext context, int index) {
return Container(
padding: const EdgeInsets.fromLTRB(8.0, 16.0, 8.0, 16.0),
child: Card(
elevation: 25,
child: Container(
height: MediaQuery.of(context).size.height/4,
child: Row(
mainAxisSize: MainAxisSize.max,
mainAxisAlignment: MainAxisAlignment.spaceAround,
children: <Widget>[
Container(
width: MediaQuery.of(context).size.width / 2 - 16,
child: Column(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: <Widget>[
Text(
'${snapshot.data[index].title}',
maxLines: 1,
overflow: TextOverflow.ellipsis,
style: TextStyle(fontSize: 28),
),
Text(
"${snapshot.data[index].date} - ${snapshot.data[index].startTime == "null" ? " Tüm gün" : "${snapshot.data[index].startTime} - ${snapshot.data[index].finishTime}"}",
style: TextStyle(fontSize: 15),
),
Text(
snapshot.data[index].desc,
maxLines: 2,
overflow: TextOverflow.ellipsis,
),
],
),
),
Container(
width: MediaQuery.of(context).size.width / 2 - 32,
child: Column(
children: <Widget>[
Container(
width: MediaQuery.of(context).size.width / 4 - 8,
child: DropDown(Event(
id: snapshot.data[index].id,
title: snapshot.data[index].title,
date: snapshot.data[index].date,
startTime: snapshot.data[index].startTime,
finishTime: snapshot.data[index].finishTime,
desc: snapshot.data[index].desc,
isActive: snapshot.data[index].isActive,
choice: snapshot.data[index].choice)),
),
],
),
),
),
);
});
}
}),
);
}

Answer 2

If there was even an overlapping problem, should be an error. Provide the debug info and try to move DropDown out of container to column
You could also close ROW in a CONTAINER