我有两个物理模拟器
每当我试图使用带有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,我的套接字连接就会完美无缺,但是如果我使用带有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,就是在<application ....> </application> AndroidManifest.xml中添加<application ....> </application>,但这并没有解决问题。
我还确保我拥有我的应用程序中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" />我想知道为什么我会得到错误的这一部分: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)。
发布于 2021-07-21 03:14:49
这似乎是安全问题。如果网络是专用的套接字就会打开。
https://stackoverflow.com/questions/68170246
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