How to Use Blurhash in flutter App or Flutter Project - flutter

Question

CachedNetworkImage(
imageUrl: "http://via.placeholder.com/350x150",
placeholder: (context, url) => new CircularProgressIndicator(),
// i want to use Blurhash on placeholder
errorWidget: (context, url, error) => new Icon(Icons.error),
),
https://pub.dev/packages/blurhash
i didn't found Any single Tutorial on it..
I Need Help

Answer 1

You can copy paste run full code below
You can await BlurHash image in main() and then use in CachedNetworkImage
code snippet
Uint8List imageDataBytes;
void main() async {
WidgetsFlutterBinding.ensureInitialized();
imageDataBytes =
await BlurHash.decode("LBAdAqof00WCqZj[PDay0.WB}pof", 32, 32);
runApp(MyApp());
}
...
CachedNetworkImage(
imageUrl: 'https://via.placeholder.com/150x150',
placeholder: (BuildContext context, String url) =>
Image.memory(imageDataBytes, width: 256, fit: BoxFit.cover),
errorWidget: (context, url, error) => new Icon(Icons.error),
),
working demo snapshot
full code
import 'package:flutter/material.dart';
import 'package:cached_network_image/cached_network_image.dart';
import 'dart:typed_data';
import 'dart:async';
import 'package:flutter/services.dart';
import 'package:blurhash/blurhash.dart';
Uint8List imageDataBytes;
void main() async {
WidgetsFlutterBinding.ensureInitialized();
imageDataBytes =
await BlurHash.decode("LBAdAqof00WCqZj[PDay0.WB}pof", 32, 32);
runApp(MyApp());
}
class MyApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key, this.title}) : super(key: key);
final String title;
#override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
int _counter = 0;
void _incrementCounter() {
setState(() {
_counter++;
});
}
#override
void initState() {
super.initState();
}
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
CachedNetworkImage(
imageUrl: 'https://via.placeholder.com/150x150',
placeholder: (BuildContext context, String url) =>
Image.memory(imageDataBytes, width: 256, fit: BoxFit.cover),
errorWidget: (context, url, error) => new Icon(Icons.error),
),
Text(
'You have pushed the button this many times:',
),
Text(
'$_counter',
style: Theme.of(context).textTheme.headline4,
),
],
),
),
floatingActionButton: FloatingActionButton(
onPressed: _incrementCounter,
tooltip: 'Increment',
child: Icon(Icons.add),
),
);
}
}