如何将Android应用程序连接到LAMP服务器

问题描述

我已经创建了一个可与LAMP（Linux，Apache，MySQL Php）一起执行的php服务器脚本

<?php
    // set some variables
    $host = "127.0.1.1";
    $port = 3651;

    // don't timeout!
    set_time_limit(0);

    // create socket
    $socket = socket_create(AF_INET,SOCK_STREAM,0) or die("Could not create socket\n");

    // bind socket to port
    $result = socket_bind($socket,$host,$port) or die("Could not bind to socket\n");

    while(true) {
        // start listening for connections
        $result = socket_listen($socket,3) or die("Could not set up socket listener\n");
        echo "after listen\n";
        // accept incoming connections
        // spawn another socket to handle communication

        $spawn = socket_accept($socket) or die("Could not accept incoming connection\n");
        echo "after accept\n";
        $pid = pcntl_fork();
        if ($pid == -1) {
            die('could not fork');
        } else if ($pid) {
            // we are the parent
        } else {
            // we are the child
            // Use $spawn for communication as you see fit
            // exit();
            // read client input
            $input = socket_read($spawn,1024) or die("Could not read input\n");
            var_dump($input);
            // clean up input string
            //$input = trim($input);
            var_dump(json_decode($input));

            // reverse client input and send back
            $output = strrev($input) . "\n";
            socket_write($spawn,$output,strlen ($output)) or die("Could not write output\n");
            socket_close($spawn);
        }  
    }
    socket_close($socket);
?>

我在终端上使用命令php test_server.php执行了它 我使用ifconfig作为192.168.0.105检查了我的私有IP 我无法通过代码为asp的android移动应用与此文件建立连接

private String HttpPost(String myUrl) throws IOException {

        URL url = new URL(myUrl);
        Log.e("HTTPpost","url Object created");
        HttpURLConnection conn = (HttpURLConnection) url.openConnection();
        Log.e("HTTPpost","connection opened");
        conn.setRequestMethod("POST");
        conn.setRequestProperty("Content-Type","application/json; charset=utf-8");
        setPostRequestContent(conn,objectToBeSent);
        conn.connect();
        Log.e("HTTPpost","connected");
        InputStream is = conn.getInputStream();
        BufferedReader reader = new BufferedReader(new InputStreamReader(is));
        StringBuilder result = new StringBuilder();
        String line;
        while((line = reader.readLine()) != null) {
            Log.e("HTTPpost",line);
            result.append(line);
        }
        return result.toString();
    }
    private void setPostRequestContent(HttpURLConnection conn,JSONObject jsonObject) throws IOException {
        OutputStream os = conn.getOutputStream();
        BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(os,"UTF-8"));
        writer.write(jsonObject.toString());
        Log.i(context.toString(),jsonObject.toString());
        writer.flush();
        writer.close();
        os.close();
    }

我以http://192.168.0.105/test_server.php:3651的身份将'myurl'传递给'HttpPost'函数 我的服务器输出仍然为after listen，并且没有显示任何接受套接字的迹象 Android应用调试日志是

2020-08-11 22:45:18.833 17839-17978/com.example.testapplication E/HTTPpost: url Object created
2020-08-11 22:45:18.850 17839-17978/com.example.testapplication E/HTTPpost: connection opened

我将网络权限设置为

<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

我还验证了我的手机和笔记本电脑都连接到了同一个wifi。

请帮助并提供一些有关如何进行的想法。

解决方法

使用端口80的客户端与apache服务器连接，并且您的php脚本已启动。 php脚本不处理发布的数据，也不回显任何内容。

因此它不与客户端通信。

它唯一要做的就是启动服务器监听端口3651。但是，它只会监听，因为永远不会有客户端尝试连接到该端口。

您的HttpUrlConnection将不会使用该端口，因为它使用端口80。

不可能的设置。