async_loader

Description:

async loader

async_loader #
A flutter plugin for loading content asynchronously.

Usage #
To use this plugin, add async_loader as a dependency in your pubspec.yaml file.
Create instance #
getMessage() async {
return new Future.delayed(TIMEOUT, () => 'Welcome to your async screen');
}

...

var _asyncLoader = new AsyncLoader(
key: _asyncLoaderState,
initState: () async => await getMessage(),
renderLoad: () => new CircularProgressIndicator(),
renderError: ([error]) =>
new Text('Sorry, there was an error loading your joke'),
renderSuccess: ({data}) => new Text(data),
);
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Trigger reload #
class ExampleApp extends StatelessWidget {
final GlobalKey<AsyncLoaderState> _asyncLoaderState =
new GlobalKey<AsyncLoaderState>();

reload() {
_asyncLoaderState.currentState.reloadState()
}
}
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Full Example #
import 'dart:async';
import 'package:flutter/material.dart';
import 'package:async_loader/async_loader.dart';

void main() {
runApp(new ExampleApp());
}

class ExampleApp extends StatelessWidget {
final GlobalKey<AsyncLoaderState> _asyncLoaderState =
new GlobalKey<AsyncLoaderState>();

@override
Widget build(BuildContext context) {
var _asyncLoader = new AsyncLoader(
key: _asyncLoaderState,
initState: () async => await getMessage(),
renderLoad: () => new CircularProgressIndicator(),
renderError: ([error]) =>
new Text('Sorry, there was an error loading your joke'),
renderSuccess: ({data}) => new Text(data),
);

return new MaterialApp(
title: 'Async Loader Demo',
theme: new ThemeData(
primarySwatch: Colors.blue,
),
home: new Scaffold(
appBar: new AppBar(title: buildTitle('Async Loader Demo')),
body: new Center(child: _asyncLoader),
floatingActionButton: new FloatingActionButton(
onPressed: () => _asyncLoaderState.currentState
.reloadState()
.whenComplete(() => print('finished reload')),
tooltip: 'Reload',
child: new Icon(Icons.refresh),
),
));
}
}

const TIMEOUT = const Duration(seconds: 5);

getMessage() async {
return new Future.delayed(TIMEOUT, () => 'Welcome to your async screen');
}

buildTitle(String title) {
return new Padding(
padding: new EdgeInsets.all(10.0),
child: new Text('Async Loader Demo'),
);
}
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