我有在局域网中运行的服务器和客户端，但是我的服务器不接受来自客户端应用程序的多个消息。在LAN中，我应该在while循环中放入什么代码，以便接受与我从客户端应用发送的消息一样多的消息？
我的服务器类是：
public class MainActivity extends Activity {
private Boolean shouldRestartSocketListen=true;
TextView tv1;
//MulticastLock lock;
static String UDP_BROADCAST = "UDPBroadcast";
DatagramSocket socket;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
tv1=(TextView)findViewById(R.id.textView1);
startListenForUDPBroadcast();
// lock.release();
}
private void listenAndWaitAndThrowIntent(InetAddress broadcastIP, Integer port) throws Exception {
byte[] recvBuf = new byte[15000];
if (socket == null || socket.isClosed()) {
socket = new DatagramSocket(port, broadcastIP);
//socket.setBroadcast(true);
}
//socket.setSoTimeout(1000);
DatagramPacket packet = new DatagramPacket(recvBuf, recvBuf.length);
Log.e("UDP", "Waiting for UDP broadcast");
socket.receive(packet);
String senderIP = packet.getAddress().getHostAddress();
String message = new String(packet.getData()).trim();
// Log.e("UDP", "Got UDB broadcast from " + senderIP + ", message: " + message);
tv1.setText(message);
// broadcastIntent(senderIP, message);
socket.close();
}
private void broadcastIntent(String senderIP, String message) {
Intent intent = new Intent(MainActivity.UDP_BROADCAST);
intent.putExtra("sender", senderIP);
intent.putExtra("message", message);
sendBroadcast(intent);
}
Thread UDPBroadcastThread;
void startListenForUDPBroadcast() {
UDPBroadcastThread = new Thread(new Runnable() {
public void run() {
try {
InetAddress broadcastIP = InetAddress.getByName("192.168.1.255"); //172.16.238.42 //192.168.1.255
Integer port = 11111;
while (shouldRestartSocketListen) {
listenAndWaitAndThrowIntent(broadcastIP, port);
}
//if (!shouldListenForUDPBroadcast) throw new ThreadDeath();
} catch (Exception e) {
Log.i("UDP", "no longer listening for UDP broadcasts cause of error " + e.getMessage());
}
}
});
UDPBroadcastThread.start();
}
void stopListen() {
shouldRestartSocketListen = false;
socket.close();
}
public void onCreate() {
};
@Override
public void onDestroy() {
stopListen();
}
public IBinder onBind(Intent intent) {
return null;
}
}
最佳答案
除非要停止监听，否则不要关闭套接字（将其置于while循环之外）。
我已经尝试过使用McAfee的UDPFlood v2.0，并使用socket.close（），就像每秒一样，一旦每秒有超过5个数据包（取决于其他任务的速度），您就会错过消息。消息在套接字（OS）中得到缓冲，但是您可以通过关闭消息来丢弃它们。