我正在尝试使用apache cordova针对Android编写此简单教程socket-io-with-apache-cordova。到目前为止，我已经完成了本教程中的所有操作，并使用自己的Android手机和android version 8.0测试了该应用程序。当我键入cordova run命令应用时，启动并启动shows the screen with "DEVICE IS READY"，什么也没有发生。我收到此Received Event: deviceready消息，并在chrome远程调试控制台中出现以下错误，并且没有任何 react ，它没有像预期的那样弹出警报。
localhost:3000/socket.io/?EIO=2&transport=polling&t=1549179448883-0:1 Failed to load resource: net::ERR_CONNECTION_REFUSED
GET http://localhost:3000/socket.io/?EIO=2&transport=polling&t=1549179463998-5 0 ()
这是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>
而且，当我用自己的IP地址
var socket = io.connect('http://localhost:3000');更改var socket = io.connect('http://172.27.180.225:3000');时，它在控制台中仅显示此Received Event: deviceready消息，但在控制台中没有任何错误，但是什么也没有发生。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位于www/js目录在
Package.json中，我添加了以下行以启动服务器"main": "server.js",
"scripts": {
"start": "node server.js"
},
我究竟做错了什么 ？任何帮助，将不胜感激 !
最佳答案
我想您忘记了启动服务器:将server.js移至项目的第一个文件夹，然后使用Package.json中定义的“node server.js”或“npm start”从命令行启动它。
在同一台计算机上的另一个命令行中，启动项目。我是用“cordova模拟浏览器”完成的
关于android - 使用Apache Cordova的Node.js和Socket.io应用程序无法在android中运行，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/54500992/