从Android Emulator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

虽然在StackOverflow中多次询问过这个问题并且我经历了很多问题，但仍无法解决我的问题，或者我无法找到问题的根本原因。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.

以下是我经历过的链接列表 -

Below are the list of links I went through --

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

从Android模拟器访问localhost：端口

如何从我的Android设备访问本地主机？

如何在android模拟器中连接localhost？

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;
    }

我正在尝试使用PHP通过WAMP服务器连接Android与MySQL数据库。 PHP文件（user_registration.php）保存在以下路径中 -

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:\wamp\www\android_connect

现在执行代码后，我收到类似 java.net的错误.SocketTimeoutException：在720000000ms之后无法连接到/10.0.2.2（端口8080）：isConnected失败：ETIMEDOUT（连接超时）。

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)".

我去了通过特定链接解决此问题 -

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

与本地主机的Android连接

但无法理解它是如何解决的！ :)

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

在这种情况下，你能帮我吗？请注意我正在使用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

我已经找到了它无法正常工作的原因。
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。所以我将IP地址从 10.0.2.2 更改为 IPv4 地址。

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 ## ，在Apache和我使用的相同。

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.

更改两个并重新启动WAMP服务器后，它就像一个魅力。

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

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