無法獲取我設備的IP地址

Question

我在獲取設備的IP地址時遇到問題。

我想將它用作服務器並將它連接到另一個將作爲客戶端的Android設備。

這是我爲服務器應用程序編寫的代碼。

public class ServerActivity extends Activity { 

private TextView serverStatus; 

// DEFAULT IP 
public static String SERVERIP = "10.0.2.15"; 

// DESIGNATE A PORT 
public static final int SERVERPORT = 8080; 

private Handler handler = new Handler(); 

private ServerSocket serverSocket; 

private EditText serverMessage; 

String str=""; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 
    serverStatus = (TextView) findViewById(R.id.TextView01); 
    serverMessage = (EditText) findViewById(R.id.TextView02); 

    SERVERIP = getLocalIpAddress(); 

    Thread fst = new Thread(new ServerThread()); 
    fst.start(); 
} 


public class ServerThread implements Runnable { 

    public void run() { 
     try { 
      if (SERVERIP != null) { 
       handler.post(new Runnable() { 
        @Override 
        public void run() { 
         serverStatus.setText("Listening on IP: " + SERVERIP); 
        } 
       }); 
       serverSocket = new ServerSocket(SERVERPORT); 
       while (true) { 
        Socket client = serverSocket.accept(); 
        handler.post(new Runnable() { 
         @Override 
         public void run() { 
          serverStatus.setText("Connected."); 
         } 
        }); 

        try { 
         BufferedReader in = new BufferedReader(new InputStreamReader(client.getInputStream())); 
         String line = null; 

         while ((line = in.readLine()) != null) { 
          str = line; 
          Log.d("ServerActivity", line); 
          handler.post(new Runnable() { 
           @Override 
           public void run() { 
            serverMessage.setText(str); 
           } 
          }); 
         } 
         break; 
        } catch (Exception e) { 
         handler.post(new Runnable() { 
          @Override 
          public void run() { 
           serverStatus.setText("Oops. Connection interrupted. Please reconnect your phones."); 
          } 
         }); 
         e.printStackTrace(); 
        } 
       } 
      } else { 
       handler.post(new Runnable() { 
        @Override 
        public void run() { 
         serverStatus.setText("Couldn't detect internet connection."); 
        } 
       }); 
      } 
     } catch (Exception e) { 
      handler.post(new Runnable() { 
       @Override 
       public void run() { 
        serverStatus.setText("Error"); 
       } 
      }); 
      e.printStackTrace(); 
     } 
    } 
} 

private String getLocalIpAddress() 
{ 
    try { 
     for (Enumeration<NetworkInterface> en = NetworkInterface.getNetworkInterfaces(); en.hasMoreElements();) { 
      NetworkInterface intf = en.nextElement(); 
      for (Enumeration<InetAddress> enumIpAddr = intf.getInetAddresses(); enumIpAddr.hasMoreElements();) { 
       InetAddress inetAddress = enumIpAddr.nextElement(); 
       if (!inetAddress.isLoopbackAddress()) { 
        return inetAddress.getHostAddress().toString(); 
       } 
      } 
     } 
    } catch (SocketException ex) { 
     return "ERROR Obtaining IP"; 
    } 
    return "No IP Available"; 
} 

@Override 
protected void onStop() { 
    super.onStop(); 
    try { 
     serverSocket.close(); 
    } catch (IOException e) { 
     e.printStackTrace(); 
    } 
} 

}

當我開始我的應用程序，它顯示在文本視圖：

"Listening on IP: fe80::2254:76ff:fe85:f2bd%wlan0". 

但是，我通過與其他IP地址的客戶端連接的是192.168.1.2（我在設備的設置中找到）。

我的問題是：如何在我的應用程序中獲得此第二個IP地址？

Answer 1

希望你找IPv4地址嘗試以下

   boolean isIP4Address = inetAddress instanceof Inet4Address; 
      if (!inetAddress.isLoopbackAddress() && isIP4Address) { 
       String Ipv4  = inetAddress.getHostAddress(); 
        //Ipv4 = 192.168.1.2  
        } 

這是IPv6的LinkedLocal無線IP FE80 :: 2254：76ff：fe85：f2bd％爲wlan0