从 Android 模拟器连接到 LocalHost/10.0.2.2 超时 [英] Connection to LocalHost/10.0.2.2 from Android Emulator timed out

问题描述

虽然这个问题在 StackOverflow 中被问过多次并且我经历了很多，但我仍然无法解决我的问题，或者我无法找出问题的根本原因.因此，发布一个新问题.

Although this question has been asked multiple times in StackOverflow and I went through many of them, still I couldn't resolve my issue or I am not able to find out the root cause of the issue. Hence, posting a new question.

以下是我浏览过的链接列表-

Below are the list of links I went through --

1. 如何在 Eclipse 中从 Android Emulator 连接到我的 http://localhost Web 服务器

从 Android 模拟器访问 localhost:port

如何访问我的本地主机来自我的 Android 设备?

如何在安卓模拟器中连接本地主机?

这是我的代码 --

protected Void doInBackground(Void... params)
    {
        try
        {
            HttpURLConnection connection = null;

            URL url = new URL("http://10.0.2.2:8080/android_connect/user_registration.php");
            connection = (HttpURLConnection)url.openConnection();
            connection.setDoOutput(true);
            connection.setDoInput(true);
            connection.setRequestMethod("POST");
            connection.setUseCaches(false);
            connection.setConnectTimeout(720000000);
            connection.setReadTimeout(72000000);
            connection.connect();

            OutputStreamWriter output = new OutputStreamWriter(connection.getOutputStream());
            output.write(emp_details.toString());
            output.flush();
            output.close();

            HttpResult = connection.getResponseCode();

            connection.disconnect();
        }
        catch(Exception e)
        {
            e.printStackTrace();
        }
        return null;
    }

我正在尝试通过 WAMP 服务器使用 PHP 将 Android 与 MySQL 数据库连接起来.PHP 文件 (user_registration.php) 保存在以下路径 --

I am trying to connect Android with MySQL database using PHP through WAMP server. The PHP file (user_registration.php) is being saved in the below path --

C:wampwwwandroid_connect

现在执行代码后，我收到类似java.net.SocketTimeoutException: failed to connect to/10.0.2.2 (port 8080) after 720000000ms: isConnected failed: ETIMEDOUT (Connection timed out)".

Now after executing the code, I am getting an error like "java.net.SocketTimeoutException: failed to connect to /10.0.2.2 (port 8080) after 720000000ms: isConnected failed: ETIMEDOUT (Connection timed out)".

我浏览了特定链接以解决此问题 --

I went through the particular link in order to resolve this issue --

Android 连接到本地主机

但是不明白怎么解决的！:)

But could not understand how it has been resolved! :)

在这种情况下你能帮我吗?请注意，我使用 Android Studio 进行构建.

Can you please help me in this case? Please note I am using Android Studio for my build.

提前致谢！

推荐答案

我已经找到了它不工作的原因.有两个问题——

I have figured out the reason why it was not working. There were two issues --

1. IP 地址不正确.因此，我将 IP 地址从 10.0.2.2 更改为 IPv4 地址 - 在 Windows 上可以通过在命令提示符中键入 ipconfig 和请参阅 链接(适用于 Linux).

1. The IP Address was not correct. So I changed the IP Address from 10.0.2.2 to the IPv4 address - which can be obtained on windows by typeing ipconfig in the command prompt and see link for linux.

端口号 8080 也不正确.我在 httpd.conf 文件中设置了我自己的端口号，比如##Listen 12.34.56.78:8383Listen 0.0.0.0:8383Listen [::0]:8383##，我在Apache下用的一样.

Also the port number 8080 was not correct. I have set my own port number in httpd.conf file, like ##Listen 12.34.56.78:8383Listen 0.0.0.0:8383Listen [::0]:8383##, under Apache and I used the same.

更改两者并重新启动 WAMP 服务器后，它工作得很好.

After changing both and re-starting the WAMP server, it worked like a charm.

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