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我有一个用 Thread 扩展的线程类，我正在尝试在其他类中创建该类的对象并从那里启动线程，当按下按钮时将创建线程但应用程序只能运行一次，我的我创建线程的主类是：

broadcastobject=new broadcast(messages);
broadcastobject.start();

我的线程类是：

public class broadcast  extends Thread{

private DatagramSocket socket;
String str;
private static final int TIMEOUT_MS = 10;
WifiManager mWifi;
EditText et;
DatagramPacket packet;
Button bt;
private static final int SERVERPORT = 11111;
private static final String SERVER_IP = "192.168.1.255";


public  broadcast(String msg){
    str=msg;
}

@Override
    public void run() {


        try {
            socket = new DatagramSocket(SERVERPORT);

            socket.setBroadcast(true);
       //               socket.setSoTimeout(TIMEOUT_MS);
        } catch (SocketException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

            InetAddress serverAddr = null;
            try {


                serverAddr = InetAddress.getByName(SERVER_IP);


            } catch (UnknownHostException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }

         packet = new DatagramPacket(str.getBytes(), str.length(),serverAddr,SERVERPORT);

            try {

                    socket.send(packet);

                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
    } 

    }

我的日志猫是：

     09-02 15:46:47.603: W/System.err(1348): java.net.BindException: bind failed: EADDRINUSE (Address already in use)
     09-02 15:46:47.613: W/System.err(1348):    at libcore.io.IoBridge.bind(IoBridge.java:89)
   09-02 15:46:47.613: W/System.err(1348):  at java.net.PlainDatagramSocketImpl.bind(PlainDatagramSocketImpl.java:68)
  09-02 15:46:47.643: W/System.err(1348):   at java.net.DatagramSocket.createSocket(DatagramSocket.java:133)
  09-02 15:46:47.703: W/System.err(1348):   at java.net.DatagramSocket.<init>(DatagramSocket.java:78)
   09-02 15:46:47.703: W/System.err(1348):  at soft.b.peopleassist.broadcast.run(broadcast.java:65)
  09-02 15:46:47.703: W/System.err(1348): Caused by: libcore.io.ErrnoException: bind failed: EADDRINUSE (Address already in use)
  09-02 15:46:47.703: W/System.err(1348):   at libcore.io.Posix.bind(Native Method)
   09-02 15:46:47.772: W/System.err(1348):  at libcore.io.ForwardingOs.bind(ForwardingOs.java:39)
   09-02 15:46:47.772: W/System.err(1348):  at libcore.io.IoBridge.bind(IoBridge.java:87)
  09-02 15:46:47.772: W/System.err(1348):   ... 4 more
  09-02 15:46:47.793: W/dalvikvm(1348): threadid=11: thread exiting with uncaught exception (group=0x409961f8)
09-02 15:46:47.823: E/AndroidRuntime(1348): FATAL EXCEPTION: Thread-79
 09-02 15:46:47.823: E/AndroidRuntime(1348): java.lang.NullPointerException
 09-02 15:46:47.823: E/AndroidRuntime(1348):    at soft.b.peopleassist.broadcast.run(broadcast.java:90)
  09-02 15:47:21.832: I/Process(1348): Sending signal. PID: 1348 SIG: 9
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1 回答 1

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您正在尝试在已使用的端口上绑定套接字。您需要在绑定新套接字之前关闭绑定的套接字。

如果您只是使您的应用程序崩溃或忘记调用或任何适合您情况的地方，Socket.close()您的应用程序下的 Linux 系统可能需要一些时间来注意到绑定的套接字已经消失。onDestroy()

于 2013-09-02T04:11:47.283 回答