java.net.SocketTimeoutException：10000 毫秒后无法连接到 /192.168.1.8（端口 8383）

Question

我是 Android 编程新手。尝试从我的 Android 客户端 (WAMP) 连接到 PHP 时出现以下错误

java.net.SocketTimeoutException: failed to connect to /192.168.1.8 (port 8383) after 10000ms
'I had searched for this type of error and had made all prescribed changes including Changing localhost to ipv address, changing the Timeout interval, configuring the httpd.conf file, still couldn't resolve.Pls find below the code, conf file changes and error log

Error Log:

java.net.SocketTimeoutException: failed to connect to /192.168.1.8 (port 8383) after 10000ms
02-20 07:42:34.857 3370-3512/com.example.vijayar.phpconnect W/System.err:     at libcore.io.IoBridge.connectErrno(IoBridge.java:169)
02-20 07:42:34.857 3370-3512/com.example.vijayar.phpconnect W/System.err:     at libcore.io.IoBridge.connect(IoBridge.java:122)
02-20 07:42:34.857 3370-3512/com.example.vijayar.phpconnect W/System.err:     at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:183)
02-20 07:42:34.857 3370-3512/com.example.vijayar.phpconnect W/System.err:     at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:456)
02-20 07:42:34.857 3370-3512/com.example.vijayar.phpconnect W/System.err:     at java.net.Socket.connect(Socket.java:882)
02-20 07:42:34.857 3370-3512/com.example.vijayar.phpconnect W/System.err:     at com.android.okhttp.internal.Platform.connectSocket(Platform.java:139)
02-20 07:42:34.857 3370-3512/com.example.vijayar.phpconnect W/System.err:     at com.android.okhttp.Connection.connect(Connection.java:148)
02-20 07:42:34.857 3370-3512/com.example.vijayar.phpconnect W/System.err:     at com.android.okhttp.internal.http.HttpEngine.connect(HttpEngine.java:276)
02-20 07:42:34.857 3370-3512/com.example.vijayar.phpconnect W/System.err:     at com.android.okhttp.internal.http.HttpEngine.sendRequest(HttpEngine.java:211)
02-20 07:42:34.857 3370-3512/com.example.vijayar.phpconnect W/System.err:     at com.android.okhttp.internal.http.HttpURLConnectionImpl.execute(HttpURLConnectionImpl.java:373)
02-20 07:42:34.857 3370-3512/com.example.vijayar.phpconnect W/System.err:     at com.android.okhttp.internal.http.HttpURLConnectionImpl.getResponse(HttpURLConnectionImpl.java:323)
02-20 07:42:34.857 3370-3512/com.example.vijayar.phpconnect W/System.err:     at com.android.okhttp.internal.http.HttpURLConnectionImpl.getResponseCode(HttpURLConnectionImpl.java:491)
02-20 07:42:34.857 3370-3512/com.example.vijayar.phpconnect W/System.err:     at com.example.vijayar.phpconnect.MainActivity$AsyncRetrieve.doInBackground(MainActivity.java:80)
02-20 07:42:34.857 3370-3512/com.example.vijayar.phpconnect W/System.err:     at com.example.vijayar.phpconnect.MainActivity$AsyncRetrieve.doInBackground(MainActivity.java:33)
02-20 07:42:34.857 3370-3512/com.example.vijayar.phpconnect W/System.err:     at android.os.AsyncTask$2.call(AsyncTask.java:288)
02-20 07:42:34.857 3370-3512/com.example.vijayar.phpconnect W/System.err:     at java.util.concurrent.FutureTask.run(FutureTask.java:237)
02-20 07:42:34.857 3370-3512/com.example.vijayar.phpconnect W/System.err:     at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
02-20 07:42:34.857 3370-3512/com.example.vijayar.phpconnect W/System.err:     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
02-20 07:42:34.857 3370-3512/com.example.vijayar.phpconnect W/System.err:     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
02-20 07:42:34.857 3370-3512/com.example.vijayar.phpconnect W/System.err:     at java.lang.Thread.run(Thread.java:818)
02-20 07:42:35.007 3370-3510/com.example.vijayar.phpconnect V/RenderScript: 0xb0f4b600 Launching thread(s), CPUs 3

Java 代码

public class MainActivity extends AppCompatActivity {

// CONNECTION_TIMEOUT and READ_TIMEOUT are in milliseconds
public static final int CONNECTION_TIMEOUT = 10000;
public static final int READ_TIMEOUT = 10000;
TextView textPHP;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    textPHP = (TextView) findViewById(R.id.textPHP);
    //Make call to AsyncRetrieve
    new AsyncRetrieve().execute();
}

private class AsyncRetrieve extends AsyncTask<String, String, String> {
    ProgressDialog pdLoading = new ProgressDialog(MainActivity.this);
    HttpURLConnection conn;
    URL url = null;

    //this method will interact with UI, here display loading message
    @Override
    protected void onPreExecute() {
        super.onPreExecute();

        pdLoading.setMessage("\tLoading...");
        pdLoading.setCancelable(false);
        pdLoading.show();

    }

    // This method does not interact with UI, You need to pass result to onPostExecute to display
    @Override
    protected String doInBackground(String... params) {
        try {
            // Enter URL address where your php file resides
            url = new URL("http://192.168.1.8:8383/Checking/Checking.php");

        } catch (MalformedURLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
            return e.toString();
        }
        try {

            // Setup HttpURLConnection class to send and receive data from php
            conn = (HttpURLConnection) url.openConnection();
            conn.setReadTimeout(READ_TIMEOUT);
            conn.setConnectTimeout(CONNECTION_TIMEOUT);
            conn.setRequestMethod("GET");

            // setDoOutput to true as we recieve data from json file
            conn.setDoOutput(true);

        } catch (IOException e1) {
            // TODO Auto-generated catch block
            e1.printStackTrace();
            return e1.toString();
        }

        try {

            int response_code = conn.getResponseCode();

            // Check if successful connection made
            if (response_code == HttpURLConnection.HTTP_OK) {

                // Read data sent from server
                InputStream input = conn.getInputStream();
                BufferedReader reader = new BufferedReader(new InputStreamReader(input));
                StringBuilder result = new StringBuilder();
                String line;

                while ((line = reader.readLine()) != null) {
                    result.append(line);
                }

                // Pass data to onPostExecute method
                return (result.toString());

            } else {

                return ("unsuccessful");
            }

        } catch (IOException e) {
            e.printStackTrace();
            return e.toString();
        } finally {
            conn.disconnect();
        }


    }

    // this method will interact with UI, display result sent from doInBackground method
    @Override
    protected void onPostExecute(String result) {

        pdLoading.dismiss();
        if(result.equals("Success! This message is from PHP")) {
            textPHP.setText(result.toString());
        }else{
            // you to understand error returned from doInBackground method
            Toast.makeText(MainActivity.this, result.toString(), Toast.LENGTH_LONG).show();
        }

    }

}
}

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

In Httpd.conf the following changes are made
#Listen 12.34.56.78:8383
Listen 0.0.0.0:8383
Listen [::0]:8383

<Directory />
    AllowOverride None
Options None
Allow from All
Require all granted
</Directory>

PHP 文件 -> Checking.Php

<?php 
      echo "Success! This message is from PHP";
?>

从浏览器调用 PHP 页面可以正常工作。

Answer 1

超时问题已解决，这就是我所做的，我已将 IPV4 添加到 httpd.conf 文件中的 Listen 命令并暂时禁用防病毒网关（阻止请求访问服务器）-

Answer 2

您的 Apache 配置可能正在侦听错误的 IP 地址。 Android 正在尝试访问 IP 地址192.168.1.8:8383，并且您的 Apache 服务器需要与您的 Android 设备位于同一网络上。我建议您确保您的 Android 设备与 Apache 服务器位于同一网络上，并且您的服务器已设置为侦听 Android 尝试连接的正确 IP 地址。