asset_cache 1.0.1 asset_cache: ^1.0.1 copied to clipboard
Load and cache binary asset of any type given a decoder. Built-in support for images, json and more.
import 'dart:ui' as ui;
import 'dart:typed_data';
import 'package:asset_cache/asset_cache.dart';
import 'package:flutter/material.dart';
final stringAssets = StringAssetCache(basePath: 'assets/strings/');
final stringAssetsWithoutBasePath = StringAssetCache();
final jsonAssets = JsonAssetCache(basePath: 'assets/json/');
final imageAssets = ImageAssetCache(basePath: 'assets/images/');
final byteAssets = ByteDataAssetCache(basePath: 'assets/images/');
void main() {
runApp(const MyApp());
}
class MyApp extends StatelessWidget {
const MyApp({Key? key}) : super(key: key);
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'asset cache demo',
theme: ThemeData(
primarySwatch: Colors.blue,
visualDensity: VisualDensity.adaptivePlatformDensity,
),
home: const MyHomePage(),
);
}
}
class MyHomePage extends StatefulWidget {
const MyHomePage({Key? key}) : super(key: key);
@override
_MyHomePageState createState() => _MyHomePageState();
}
class MyImagePainter extends CustomPainter {
final ui.Image image;
MyImagePainter(this.image);
@override
void paint(Canvas canvas, Size size) {
final myPaint = Paint();
canvas.save();
canvas.translate(100, 100);
canvas.rotate(1.5);
canvas.scale(3.0);
canvas.drawImage(image, Offset.zero, myPaint);
canvas.restore();
}
@override
bool shouldRepaint(covariant CustomPainter oldDelegate) {
return false;
}
}
class _MyHomePageState extends State<MyHomePage> {
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: const Text('asset cache demo'),
),
body: Center(
child: Column(
children: [
FutureBuilder<String>(
future: stringAssets.load('hello.txt'),
builder: (context, snapshot) {
if (snapshot.hasData) {
return Text(snapshot.data ?? '');
} else {
return const Text('loading..');
}
},
),
FutureBuilder<String>(
future: stringAssetsWithoutBasePath
.load('assets/strings/hello-new-string.txt'),
builder: (context, snapshot) {
if (snapshot.hasData) {
return Text(snapshot.data ?? '');
} else {
return const Text('loading..');
}
},
),
FutureBuilder<dynamic>(
future: jsonAssets.load('sprite.json'),
builder: (context, snapshot) {
if (snapshot.hasData) {
return Text(snapshot.data.toString());
} else {
return const Text('loading..');
}
},
),
FutureBuilder<ui.Image>(
future: imageAssets.load('angel.png'),
builder: (context, snapshot) {
if (snapshot.hasData) {
return CustomPaint(
painter: MyImagePainter(snapshot.data!),
);
} else {
return const Text('loading..');
}
},
),
FutureBuilder<ByteData>(
future: byteAssets.load('angel.png'),
builder: (context, snapshot) {
if (snapshot.hasData) {
return Image.memory(snapshot.data!.buffer.asUint8List());
} else {
return const Text('loading..');
}
},
),
],
),
),
);
}
}