A RenderFlex overflowed by 21 pixels on the bottom - flutter

Question

I'm newbie in the flutter and I try use Grid View but it shows a render flex overflowed by 21 pixels on the bottom. In the GridView I'm using picture, but it shows error. Anyone know how to fix it? Thank you
I search on the internet, it use SingleChildScrollView, but I don't want to use it because it looks weird for the Grid view
Here my code
import 'package:flutter/material.dart';
import 'package:monger_app/page/detail.dart';
class BudgetSettings extends StatefulWidget {
#override
_BudgetSettingsState createState() => _BudgetSettingsState();
}
class _BudgetSettingsState extends State<BudgetSettings> {
List<Container> categorylist = new List();
var character=[
{"name":"Food", "image":"food.png"},
{"name":"Social-Life", "image":"travel.png"},
{"name":"Transportation", "image":"transportation.png"},
{"name":"Beauty", "image":"makeup.png"},
{"name":"Household", "image":"household.png"},
{"name":"Education", "image":"education.png"},
{"name":"Health", "image":"health.png"},
{"name":"Gift", "image":"gift.png"},
{"name":"Other", "image":"other.png"},
];
_makelist() async {
for (var i = 0; i < character.length; i++) {
final newcharacter = character[i];
final String image = newcharacter["image"];
categorylist.add(
new Container(
padding: new EdgeInsets.all(20.0),
child: new Card( child:
new Column(
children: <Widget>[
new Image.asset('assets/$image', fit: BoxFit.cover,),
new Padding(padding: new EdgeInsets.all(5.0),),
new Text(newcharacter['name'], style: new TextStyle(fontSize: 18.0),),
],
),
),
)
);
}
}
#override
void initState() {
_makelist();
super.initState();
}
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('Budget Setting'),
),
body: new GridView.count(
crossAxisCount: 2,
children: categorylist,
),
);
}
}
And here my output

Answer 1

A simple solution for your problem is wrapping your image widget inside a Flexible widget, just like this:
Flexible(
child: Image.asset('assets/$image', fit: BoxFit.cover,),
),