[英]Node.js and Socket.io app with Apache Cordova not working in android
我正在嘗試按照這個簡單的教程socket-io-with-apache-cordova for android with apache cordova。 到目前為止,我按照教程中的所有內容進行了操作,並使用自己的 android 手機android version 8.0
來測試該應用程序。 當我輸入cordova run命令應用程序被啟動並shows the screen with "DEVICE IS READY"
,沒有任何反應。 我在 chrome 遠程調試控制台中收到此Received Event: deviceready
消息和以下錯誤,但沒有任何反應,它不會像預期的那樣彈出警報。
localhost:3000/socket.io/?EIO=2&transport=polling&t=1549179448883-0:1 加載資源失敗:net::ERR_CONNECTION_REFUSED
GET http://localhost:3000/socket.io/?EIO=2&transport=polling&t=1549179463998-5 0 ()
這是 index.html
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Security-Policy" content="default-src *; style-src 'self' http://* 'unsafe-inline'; script-src 'self' http://* 'unsafe-inline' 'unsafe-eval'" />
<meta name="format-detection" content="telephone=no">
<meta name="msapplication-tap-highlight" content="no">
<meta name="viewport" content="user-scalable=no, initial-scale=1, maximum-scale=1, minimum-scale=1, width=device-width">
<link rel="stylesheet" type="text/css" href="css/index.css">
<title>Hello World</title>
</head>
<body>
<div class="app">
<h1>Apache Cordova</h1>
<div id="deviceready" class="blink">
<p class="event listening">Connecting to Device</p>
<p class="event received">Device is Ready</p>
</div>
</div>
<script type="text/javascript" src="cordova.js"></script>
<script type="text/javascript" src="http://cdn.socket.io/socket.io-1.0.3.js"></script>
<script type="text/javascript" src="js/index.js"></script>
<script type="text/javascript">
app.initialize();
document.addEventListener('deviceready', function() {
var socket = io.connect('http://localhost:3000');
socket.on('connect', function() {
socket.on('text', function(text) {
alert(text);
});
});
});
</script>
</body>
</html>
當我改變var socket = io.connect('http://localhost:3000');
像這樣,我的 IP 地址var socket = io.connect('http://172.27.180.225:3000');
它不會在控制台中給出任何錯誤,僅此Received Event: deviceready
消息在控制台中,但沒有任何反應。
index.js 文件
var app = {
initialize: function() {
document.addEventListener('deviceready', this.onDeviceReady.bind(this), false);
},
onDeviceReady: function() {
this.receivedEvent('deviceready');
},
receivedEvent: function(id) {
var parentElement = document.getElementById(id);
var listeningElement = parentElement.querySelector('.listening');
var receivedElement = parentElement.querySelector('.received');
listeningElement.setAttribute('style', 'display:none;');
receivedElement.setAttribute('style', 'display:block;');
console.log('Received Event: ' + id);
}
};
app.initialize();
server.js 文件
var server = require('http').createServer();
var io = require('socket.io')(server);
io.sockets.on('connection', function(socket) {
console.log('socket connected');
socket.on('disconnect', function() {
console.log('socket disconnected');
});
socket.emit('text', 'wow. such event. very real time.');
});
server.listen(3000);
index.js and server.js
位於www/js
目錄並且在Package.json
我添加了這些行來啟動服務器
"main": "server.js",
"scripts": {
"start": "node server.js"
},
我究竟做錯了什么 ? 任何幫助,將不勝感激 !
我想您忘記啟動服務器了:將 server.js 移動到項目的第一個文件夾中,並從命令行使用“node server.js”或“npm start”啟動它,正如您在 Package.json 中定義的那樣同一台電腦,在另一個命令行,啟動項目。 我用“cordova emulate browser”做到了
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