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Description:

action broadcast

action_broadcast #

一个简单的全局广播系统，类似于Android的本地广播
Usage #

添加 action_broadcast 到 pubspec.yaml 文件.
import 'package:action_broadcast/action_broadcast.dart';

Listen #

传统使用方式

const actionUserLogin = 'actionUserLogin';
const actionUserInfoChange = 'actionUserInfoChange';
const actionLogout = 'actionLogout';

// in State

StreamSubscription receiver;

@override
void initState() {
super.initState();

receiver = registerReceiver([actionUserLogin, actionUserInfoChange, actionLogout]).listen((intent){
switch(intent.action){
case actionUserLogin:
accountId = intent.data;
break;
case actionUserInfoChang:
nickname = intent['nickname'];
break;
case actionLogout:
Navigator.pop(context);
break;
}
});
}

@override
void dispose(){
receiver.cancel();
super.dispose();
}

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在State中混入自动化管理StreamSubscription的AutoCancelStreamMixin以简化工作

class _ExampleState extends State<Example> with AutoCancelStreamMixin{

@override
Iterable<StreamSubscription> get registerSubscriptions sync* {
yield registerReceiver([actionUserLogin]).listen((intent) {
setState(() {
// do something
});
},
);

yield registerSingleReceiver(actionLogout).listen((intent) {
setState(() {
// do something
});
},
);
}

}

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Notify #
sendBroadcast(actionUserLogin, data : 'accountId');
sendBroadcast(actionUserInfoChang, extras: {'nickname' : 'asdasd'});
sendBroadcast(actionLogout);