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42 Flutter: Using Image Assets
main.dart
import 'package:flutter/material.dart';
import 'package:tutorial/widgets.dart';
void main() {
runApp(new MyApp());
}
class MyApp extends StatelessWidget{
@override
Widget build(BuildContext context) {
return new MaterialApp(
title: 'Flutter Demo',
home: new Texty(),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key, this.title}) : super(key: key);
final String title;
@override
_MyHomePageState createState() => new _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage>{
@override
Widget build(BuildContext context) {
return new Scaffold(
appBar: new AppBar(
title: new Text('Flutter Demo'),
),
body: new Center(
child: new MyExploreWidget(),
),
);
}
}
widgets.dart
import 'package:flutter/material.dart';
class Texty extends StatelessWidget {
@override
Widget build(BuildContext context) {
return new Container(child: new Text('This works'));
}
}
class MyExploreWidget extends StatelessWidget {
@override
Widget build(BuildContext context) {
var assetsImage = new AssetImage('assets/explore.png');
var image = new Image(image: assetsImage, width: 48.0, height: 48.0);
return new Container(child: image);
}
}
We've created assets directory in our Flutter app to store all our images used in this project and defined that in pubspec.yaml file
pubspec.yaml
name: tutorial
description: A new Flutter project.
dependencies:
flutter:
sdk: flutter
path_provider: "^0.4.0"
# The following adds the Cupertino Icons font to your application.
# Use with the CupertinoIcons class for iOS style icons.
cupertino_icons: ^0.1.0
dev_dependencies:
flutter_test:
sdk: flutter
# For information on the generic Dart part of this file, see the
# following page: https://www.dartlang.org/tools/pub/pubspec
# The following section is specific to Flutter.
flutter:
# The following line ensures that the Material Icons font is
# included with your application, so that you can use the icons in
# the material Icons class.
uses-material-design: true
# To add assets to your application, add an assets section, like this:
assets:
- assets/explore.png
- assets/2.0x/explore.png
# An image asset can refer to one or more resolution-specific "variants", see
# https://flutter.io/assets-and-images/#resolution-aware.
# For details regarding adding assets from package dependencies, see
# https://flutter.io/assets-and-images/#from-packages
# To add custom fonts to your application, add a fonts section here,
# in this "flutter" section. Each entry in this list should have a
# "family" key with the font family name, and a "fonts" key with a
# list giving the asset and other descriptors for the font. For
# example:
# fonts:
# - family: Schyler
# fonts:
# - asset: fonts/Schyler-Regular.ttf
# - asset: fonts/Schyler-Italic.ttf
# style: italic
# - family: Trajan Pro
# fonts:
# - asset: fonts/TrajanPro.ttf
# - asset: fonts/TrajanPro_Bold.ttf
# weight: 700
#
# For details regarding fonts from package dependencies,
# see https://flutter.io/custom-fonts/#from-packages