来自带有 API 30 (android 11) 的三星物理模拟器的错误 Android 11 -> java.net.SocketTimeoutException

Posted 2023-04-18

【中文标题】来自带有 API 30 (android 11) 的三星物理模拟器的错误 Android 11 -> java.net.SocketTimeoutException

【英文标题】：Error Android 11 -> java.net.SocketTimeoutException from Samsung physical emulator with API 30 (android 11)

【发布时间】：2021-09-11 03:57:42

【问题描述】：

我有两个物理模拟器

采用 API 30 (android 11) 的三星手机 采用 API 25 (android 7.1) 的三星平板电脑

每当我尝试使用带有 API 25 (android 7.1) 的三星平板电脑运行连接到套接字的应用程序时，我都会完美连接套接字，但如果我使用带有 API 30 (android 11) 的三星手机运行它，我总是在堆栈跟踪中得到以下错误：

java.net.SocketTimeoutException: failed to connect to /192.168.43.1 (port 5050) from /10.144.1.42 (port 50696) after 5000ms

这是我的代码：

public class MainActivity extends AppCompatActivity 
AtomicReference<String> serverIP = new AtomicReference<>("");
String localIP;
@Override
protected void onCreate(Bundle savedInstanceState) 
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    setWiFiAddress(getApplication());
    ExecutorService executorService = Executors.newFixedThreadPool(1);
    executorService.execute(() -> 
        Socket socket = new Socket();
        try 
            socket.connect(new InetSocketAddress(serverIP.get(), 5050), 5000);
         catch (Exception e) 
            e.printStackTrace();
        
        System.out.println("ok");
    );


public Boolean setWiFiAddress(Application application) 
    ConnectivityManager connectivityManager = (ConnectivityManager) application.getSystemService(Context.CONNECTIVITY_SERVICE);
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) 
        Network nw = connectivityManager.getActiveNetwork();
        if (nw == null) return false;
        NetworkCapabilities actNw = connectivityManager.getNetworkCapabilities(nw);
        if (actNw != null && actNw.hasTransport(NetworkCapabilities.TRANSPORT_WIFI)) 
            final WifiManager manager = (WifiManager) getApplicationContext().getSystemService(Context.WIFI_SERVICE);
            InetAddress localIP = getIntAddress(manager.getDhcpInfo().ipAddress);
            if(localIP != null) 
                this.localIP = localIP.getHostAddress();
            
            InetAddress address = getIntAddress(manager.getDhcpInfo().serverAddress);
            if (address != null) 
                serverIP.set(address.getHostAddress());
                return true;
            
        
    
    serverIP.set("");
    return false;


private InetAddress getIntAddress(int hostAddress) 
    // Get IP Address
    byte[] addressBytes = (byte) (0xff & hostAddress),
            (byte) (0xff & (hostAddress >> 8)),
            (byte) (0xff & (hostAddress >> 16)),
            (byte) (0xff & (hostAddress >> 24));

    try 
        return InetAddress.getByAddress(addressBytes);
     catch (UnknownHostException e) 
        return null;
    

我在网上搜索了很多建议是在<application ....> </application> AndroidManifest.xml 中添加android:usesCleartextTraffic="true"，但这并没有解决问题。

我还确保我拥有我的应用所需的所有权限列表：

<uses-permission android:name="android.permission.MANAGE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />
<uses-permission android:name="android.permission.READ_PHONE_NUMBERS" />
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
<uses-permission android:name="android.permission.CHANGE_NETWORK_STATE" />
<uses-permission android:name="android.hardware.location.gps" />
<uses-permission android:name="android.hardware.location.network" />
<uses-permission android:name="android.permission.GET_ACCOUNTS" />
<uses-permission android:name="android.permission.WAKE_LOCK" />
<uses-permission android:name="com.google.android.c2dm.permission.RECEIVE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="android.permission.VIBRATE" />
<uses-permission android:name="android.permission.SEND_SMS" />
<uses-permission android:name="android.permission.READ_PHONE_STATE" />
<uses-permission android:name="android.permission.RECEIVE_SMS" />
<uses-permission android:name="android.permission.FOREGROUND_SERVICE" />

<uses-feature android:name="android.hardware.camera" />
<uses-feature android:name="android.hardware.camera.autofocus" />

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

我想知道为什么我得到这部分错误：from /10.144.1.42 (port 50696)，因为网络子网是：192.168.43.x，服务器套接字位于 192.168.43.1（它也是 wifi 服务器）。

【参考方案1】：

这似乎是安全问题。 如果网络是私有套接字将打开。