java.io.IOException : Attempted to join a non-multicast group 异常

Question

我正在开发 Android 3.1 平板电脑应用程序。

它有一个MulticastSocket:

public MulticastClient(String serverName, int port, Handler serviceHandler) throws IOException
{
    super(serverName);

    socket = new MulticastSocket(8888);
    InetAddress group = InetAddress.getByName("203.0.113.0");
    socket.joinGroup(group);

    this.mServiceHandler = serviceHandler; 
}

这里出现错误:

InetAddress group = InetAddress.getByName("203.0.113.0");

这是错误:

java.io.IOException:尝试加入非多播组

我该如何修复这个错误？

Answer 1

如前所述here , 多播地址有一个严格和强制的范围。

The multicast addresses are in the range 224.0.0.0 through 239.255.255.255.