Flutter A RenderFlex overflowed by 99469 pixels on the bottom - flutter

Question

I am new to flutter and trying to solve the below issue, in the first screenshot I have labelStart line 127 value as 1.21, when i pass that value using the variable i get renderflex error, if i am using hardcoded i don't get any error. Not sure what i am doing wrong. I tried adding Expanded after reading few posts online but that didn't help. Can someone please guide me on what mistake i am doing here?
class _ListPageState extends State<ListPage> with SingleTickerProviderStateMixin {
List<MusicModel> _list;
var _value;
int _playId;
String _playURL;
bool isPlaying = false;
String _startTime;
String _endTime;
AnimationController _controller;
AudioPlayer _audioPlayer = AudioPlayer();
#override
void initState() {
_playId = 0;
_list = MusicModel.list;
_controller = AnimationController(vsync: this,duration: Duration(microseconds: 250));
_value = 0.0;
_startTime="0.0";
_endTime="0.0";
super.initState();
_audioPlayer.onAudioPositionChanged.listen((Duration duration) {
setState(() {
_startTime = duration.toString().split(".")[0];
});
});
_audioPlayer.onDurationChanged.listen((Duration duration) {
setState(() {
_endTime = duration.toString().split(".")[0];
});
});
}
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
elevation: 0,
backgroundColor: AppColors.mainColor,
centerTitle: true,
title: Text("Skin - Flume",
style: TextStyle(color: AppColors.styleColor),),
),
backgroundColor: AppColors.mainColor,
body: Stack(
children: <Widget>[
Column(
children: <Widget>[
Padding(
padding: const EdgeInsets.all(24.0),
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: <Widget>[
CustomButtonWidget(
child: Icon(
Icons.favorite,
color: AppColors.styleColor,
),
size: 50,
onTap: (){
},
),
CustomButtonWidget(
image: 'assets/logo.jpg',
size: 100,
borderWidth: 5,
onTap: (){
Navigator.of(context).push(
MaterialPageRoute(builder: (_) => DetailPage(),
),
);
},
),
CustomButtonWidget(
child: Icon(
Icons.menu,
color: AppColors.styleColor,
),
size: 50,
onTap: (){
Navigator.of(context).push(
MaterialPageRoute(builder: (_) => HomePage(),
),
);
},
)
],
),
),
//Progress bar section
// Expanded(child: SizedBox()),
Padding(
padding: const EdgeInsets.symmetric(horizontal: 24),
child: CustomProgressWidget(
value: _value,
labelStart: "1.21",
labelend: "2.34",
),
),
// Expanded(child: SizedBox()),
Expanded( //This is added so we can see overlay else this will be over button
child: ListView.builder(
physics: BouncingScrollPhysics(),//This line removes the dark flash when you are at the begining or end of list menu. Just uncomment for
itemCount: _list.length,
padding: EdgeInsets.all(12),
itemBuilder: (context,index){
return GestureDetector(
onTap: (){
Navigator.of(context).push(
MaterialPageRoute(builder: (_) => DetailPage(),
),
);
},
child: AnimatedContainer(
duration: Duration(milliseconds: 500),
//This below code will change the color of sected area or song being played.
decoration: BoxDecoration(
color: _list[index].id == _playId
? AppColors.activeColor
: AppColors.mainColor,
borderRadius: BorderRadius.all(
Radius.circular(20),
),
),
//End of row color change
child: Padding(
padding: const EdgeInsets.all(16), //This will all padding around all size
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween, //This will allign button to left, else button will be infront of name
children: <Widget>[
Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
Text(
_list[index].title,
style: TextStyle(
color: AppColors.styleColor,
fontSize: 16,
),
),
Text(
_list[index].album,
style: TextStyle(
color: AppColors.styleColor.withAlpha(90),
fontSize: 16,
),
),
],
),
CustomButtonWidget( //This is Play button functionality on list page.
child: Icon(
_list[index].id == _playId
? Icons.pause
: Icons.play_arrow,
color: _list[index].id == _playId
? Colors.white
: AppColors.styleColor,
),
size: 50,
isActive: _list[index].id == _playId,
onTap: () async {
if (isPlaying){
if (_playId == _list[index].id){
int status = await _audioPlayer.pause();
if (status == 1){
setState(() {
isPlaying = false;
});
}
} else {
_playId = _list[index].id;
_playURL = _list[index].songURL;
_audioPlayer.stop();
int status = await _audioPlayer.play(_playURL);
if (status == 1){
setState(() {
isPlaying = true;
});
}
}
// int status = await _audioPlayer.pause();
// if (status == 1){
// setState(() {
// isPlaying = false;
// });
// }
} else {
_playId = _list[index].id;
_playURL = _list[index].songURL;
int status = await _audioPlayer.play(_playURL);
if (status == 1){
setState(() {
isPlaying = true;
});
}
} // String filePath = await FilePicker.getFilePath();
},
// onTap: (){
// setState(() {
// _playId = _list[index].id;
// });
// },
)
],
),
),
),
);
},
),
)
],
),
Align(
alignment: Alignment.bottomCenter,
child: Container(
height: 50,
decoration: BoxDecoration(
gradient: LinearGradient(
colors: [
AppColors.mainColor.withAlpha(0),
AppColors.mainColor,
],
begin: Alignment.topCenter,
end: Alignment.bottomCenter,
)
),
),
)
],
),
);
}
}
After changing line 1.27 with a dynamic value variable.

Answer 1

You have to wrap you Column in a scrollview like SingleChildScrollView or ListView. This error occurs when the items in column take more space than available.

Answer 2

I had the same problem, and my problem was my variable extracted of my state it took too long in show and showed first the widget after the variable.
In my case use Getx, and fixed for this way:
My old code:
GetX<UserController>(
builder: (_){
return Text(_.user.name);
}
},
),
My new code
GetX<UserController>(
builder: (_){
if(_.user.email != null){
return Text(_.user.name);
}else{
return Text('Loading....');
}
},
),