java屏幕点击_如何在点击推送通知时打开特定屏幕

由于&＃64;xqwzts方法适用于在App上接收消息是开放状态&＃xff0c;

下面的示例将导航到特定页面&＃xff0c;

[该守则仅来自消防局信息插件示例代码&＃xff0c;并导航到一个名为页面&＃xff0c;我们通过火灾控制台发送的数据]

//eg:if you give /Nexpage3 in status field then it will navigate to Nextpage3 of your App

了解2件事&＃xff0c;FCM通知有2个部分

1st Message Title firebase Cloud 消息传递页面中的部分名为 Notification Data [当应用程序被缩减或关闭时&＃xff0c;它将显示为通知]

2nd Message Title seciton which is in the Bottom of th webpage is called Message Data &＃xff0c;[它将显示在内部应用程序中作为通知或警报对话符合您的愿望]

STEPS 创建一个虚拟项目然后使用firebase消息插件&＃xff0c;并在该框中将BMW Cars作为主题并单击订阅

现在转到你的控制台&＃xff0c;然后发送一条消息&＃xff0c;其中包含以下格式&＃xff0c;它必须包含 Id 和 Status 键&＃xff0c;因为我们正在解析Id和状态键&＃xff0c;以便显示带有状态键的Vlaue的NextPage&＃xff0c;但如果你更喜欢像 Headers 或正文这样的字段&＃xff0c;那么你可以这样做但确保在你的flutter代码中解析 Map 值 .

//THIS IS A LITTLE BIT MODIFIED VERSION OF Example Code given in Firebase

//Messagaing Plugin

//WHEN U PASTE THE CODE IN UR VSCODE OR ANDROID STUDIO PLEASE Format the

//Document because it is aligned in single lines

import &＃39;dart:async&＃39;;

import &＃39;package:firebase_messaging/firebase_messaging.dart&＃39;;

import &＃39;package:flutter/material.dart&＃39;;

void main() {

runApp(

new MaterialApp(

home: new PushMessagingExample(),

routes: {

"/Nexpage1":(BuildContext context)&＃61;> new Nexpage1(),

"/Nexpage2":(BuildContext context)&＃61;> new Nexpage2(),

"/Nexpage3":(BuildContext context)&＃61;> new Nexpage3(),

} ),);}

//INITIAL PARAMETERS

String _homeScreenText &＃61; "Waiting for token...";

bool _topicButtonsDisabled &＃61; false;

final FirebaseMessaging _firebaseMessaging &＃61; new FirebaseMessaging();

final TextEditingController _topicController &＃61; new TextEditingController(text: &＃39;topic&＃39;);

final Map _items &＃61; {};

Item _itemForMessage(Map message) {

final String itemId &＃61; message[&＃39;id&＃39;];

final Item item &＃61; _items.putIfAbsent(itemId, () &＃61;> new Item(itemId: itemId))..status &＃61; message[&＃39;status&＃39;];

return item;

}

//MAIN CLASS WHICH IS THE HOMEPAGE

class PushMessagingExample extends StatefulWidget {

&＃64;override

_PushMessagingExampleState createState() &＃61;> new _PushMessagingExampleState();

}

class _PushMessagingExampleState extends State {

void _navigateToItemDetail(Map message) {

final String pagechooser&＃61; message[&＃39;status&＃39;];

Navigator.pushNamed(context, pagechooser);

}

//CLEAR TOPIC

void _clearTopicText() {setState(() {_topicController.text &＃61; "";_topicButtonsDisabled &＃61; true;});}

//DIALOGUE

void _showItemDialog(Map message) {showDialog(context: context,builder: (_) &＃61;> _buildDialog(context, _itemForMessage(message)),).then((bool shouldNavigate) {if (shouldNavigate &＃61;&＃61; true) {_navigateToItemDetail(message);}});}

//WIDGET WHICH IS GOING TO BE CALLED IN THE ABOVE DIALOGUE

Widget _buildDialog(BuildContext context, Item item) {return new AlertDialog(content: new Text("Item ${item.itemId} has been updated"),actions: [new FlatButton(child: const Text(&＃39;CLOSE&＃39;),onPressed: () {Navigator.pop(context, false);},),new FlatButton(child: const Text(&＃39;SHOW&＃39;),onPressed: () {Navigator.pop(context, true);},),]);}

&＃64;override

void initState() {

super.initState();

_firebaseMessaging.configure(

onLaunch: (Map message) async { _navigateToItemDetail(message);},

onResume: (Map message) async { _navigateToItemDetail(message);},

onMessage: (Map message) async {_showItemDialog(message);},);

//GETTING TOKEN FOR TESTING MANUALY

_firebaseMessaging.getToken().then((String token) {assert(token !&＃61; null);setState(() {_homeScreenText &＃61; "Push Messaging token: $token";});print(_homeScreenText);});}

&＃64;override

Widget build(BuildContext context) {

return new Scaffold(

appBar: new AppBar( title: const Text(&＃39;Push Messaging Demo&＃39;),),

body: new Material(

child: new Column(

children: [

new Center(

child: new Text(_homeScreenText),

),

new Row(children: [

new Expanded(

child: new TextField(

controller: _topicController,

onChanged: (String v) {

setState(() {

_topicButtonsDisabled &＃61; v.isEmpty;

});

}),

),

new FlatButton(

child: const Text("subscribe"),

onPressed: _topicButtonsDisabled

? null

: () {

_firebaseMessaging

.subscribeToTopic(_topicController.text);

_clearTopicText();

},

),

new FlatButton(child: const Text("unsubscribe"),

onPressed: _topicButtonsDisabled? null: () { _firebaseMessaging.unsubscribeFromTopic(_topicController.text);

_clearTopicText();},),

])],),));}}

//THREE DUMMY CLASSES FOR TESTING PURPOSE

//PAGE1

class Nexpage1 extends StatefulWidget { &＃64;override _Nexpage1State createState() &＃61;> _Nexpage1State();}

class _Nexpage1State extends State { &＃64;override Widget build(BuildContext context) { return Scaffold(body: new Center(child: new Text(" Page1"),));}}

//PAGE2

class Nexpage2 extends StatefulWidget { &＃64;override _Nexpage2State createState() &＃61;> _Nexpage2State();}

class _Nexpage2State extends State { &＃64;override Widget build(BuildContext context) { return Scaffold( body: Center(child: new Text("2pending"),) ); }}

//PAGE3

class Nexpage3 extends StatefulWidget { &＃64;override _Nexpage3State createState() &＃61;> _Nexpage3State();}

class _Nexpage3State extends State { &＃64;override Widget build(BuildContext context) { return Scaffold( body: Center(child: new Text("3connected"),) ); }}

//THIS IS THE CLASS WHICH IS USED TO PARSE THE INFORMATION

class Item {

Item({this.itemId});

final String itemId;

StreamController _controller &＃61; new StreamController.broadcast();

Stream get onChanged &＃61;> _controller.stream;

String _status;

String get status &＃61;> _status;

set status(String value) {

_status &＃61; value;

_controller.add(this);

}

static final Map> routes &＃61; >{};

Route get route {

final String routeName &＃61; &＃39;/detail/$itemId&＃39;;

return routes.putIfAbsent(

routeName,

() &＃61;> new MaterialPageRoute(

settings: new RouteSettings(name: routeName),

builder: (BuildContext context) &＃61;> new Nexpage3(),

),

);

}

}