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import 'dart:async';
import 'dart:typed_data';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
class AssestPlatformChannel extends StatefulWidget {
@override
_AssestPlatformChannelState createState() => _AssestPlatformChannelState();
}
class _AssestPlatformChannelState extends State<AssestPlatformChannel> {
static const MethodChannel methodChannel =
MethodChannel('GMAssetsMethodChannelName');
static const EventChannel eventChannel =
EventChannel('GMAssetsEventChannelName');
Uint8List _imageData;
String _tttt = 'ssss';
Future<void> _editPortrait() async {
Uint8List imageData;
try {
final result = await methodChannel.invokeMethod('editPortrait');
imageData = result;
} on PlatformException {
imageData = null;
}
setState(() {
_imageData = imageData;
_tttt = _imageData.runtimeType.toString();
});
}
@override
void initState() {
super.initState();
eventChannel.receiveBroadcastStream().listen(_onEvent, onError: _onError);
}
void _onEvent(Object event) {
setState(() {});
}
void _onError(Object error) {
setState(() {});
}
@override
Widget build(BuildContext context) {
return Material(
child: Scaffold(
appBar: AppBar(
title: Text('editPortrait test'),
),
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: <Widget>[
Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Text(_tttt, key: const Key('editPortrait')),
Padding(
padding: const EdgeInsets.all(16.0),
child: RaisedButton(
child: const Text('editPortrait'),
onPressed: _editPortrait,
),
),
Container(
color: Colors.pink[300],
width: 300,
height: 300,
child: _imageWidget()
)
],
),
],
),
),
),
);
}
Widget _imageWidget(){
if (_imageData != null) {
return Image.memory(_imageData,
width: 200,
height: 200,
);
}else{
return Center(
child: Text('I am not image'+_tttt),
);
}
}
}