我有两个移动设备之间使用java套接字的聊天程序，当我尝试使用相同的网络（LAN）将客户端连接到服务器时，它工作正常，我能够从客户端发送到服务器，反之亦然 但是当我试图在（WAN）连接它们时它没有用 服务器端::
public class MainActivity extends AppCompatActivity {
Thread TH;
ServerSocket ss;
Socket S;
DataOutputStream DOS;
String data;
String recieved = "GPS";
String Response="sondos";
TextView et_port;
TextView tv_receive;
TextView tv_transmit;
TextView status;
boolean isbind = false;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
et_port = (TextView) findViewById(R.id.et_port);
tv_receive = (TextView) findViewById(R.id.tv_receive);
tv_transmit = (TextView) findViewById(R.id.tv_transmit);
status = (TextView) findViewById(R.id.status);
Intent intent =new Intent(this,MyService.class);
startService(intent);
establishconnection();
}
public void establishconnection()
{
TH=new
Thread(new Runnable() {
@Override
public void run () {
try {
status.setText(MyService.getipaddress());
ss = new ServerSocket(8080);
while (true) {
S = ss.accept();
status.post(new Runnable() {
@Override
public void run() {
status.setText("connected");
}
}
);
CommunicationThread commThread = new CommunicationThread(S);
new Thread(commThread).start();
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
);
TH.start();
}
class CommunicationThread implements Runnable {
private Socket ClientSocket;
DataInputStream DIS;
public CommunicationThread(Socket ClientSocket) throws IOException {
this.ClientSocket = ClientSocket;
DIS = new DataInputStream(ClientSocket.getInputStream());
data = DIS.readUTF();
}
public void run() {
while (!Thread.currentThread().isInterrupted()) {
data = data.toString();
tv_receive.post(new Runnable() {
public void run() {
tv_receive.setText(data);
}
});
while (recieved.equals(data)) {
try {
DOS = new DataOutputStream(S.getOutputStream());
DOS.writeUTF(Response);
} catch (IOException e) {
e.printStackTrace();
}
tv_transmit.post(new Runnable() {
@Override
public void run() {
tv_transmit.setText(Response);
}
});
try {
DOS.flush();
DOS.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
}
@Override
protected void onStop() {
super.onStop();
try {
S.close();
} catch (IOException e) {
e.printStackTrace();
}
}
//// public static String getIpAddress() {
//// String ip = "";
//// try {
//// Enumeration<NetworkInterface> enumNetworkInterfaces = NetworkInterface
//// .getNetworkInterfaces();
//// while (enumNetworkInterfaces.hasMoreElements()) {
//// NetworkInterface networkInterface = enumNetworkInterfaces
//// .nextElement();
//// Enumeration<InetAddress> enumInetAddress = networkInterface
//// .getInetAddresses();
//// while (enumInetAddress.hasMoreElements()) {
//// InetAddress inetAddress = enumInetAddress.nextElement();
////
//// if (inetAddress.isSiteLocalAddress()) {
//// ip += "Hosted On: "
//// + inetAddress.getHostAddress() + "\n";
//// }
//// }
//// }
// } catch (SocketException e) {
// // TODO Auto-generated catch block
// e.printStackTrace();
// }
// return ip;
// }
客户端::
public class MainActivity extends AppCompatActivity {
TextView tv_device, tv_receive, tv_transmit;
Button btn_connect, btn_GPS;
EditText et_IP_Address, et_port, et_message;
Socket S;
DataOutputStream DOS;
DataOutputStream DOS2;
DataInputStream DIS;
Thread TH;
Thread TH2;
String data;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
et_IP_Address= (EditText) findViewById(R.id.et_IP_Address);
et_port= (EditText) findViewById(R.id.et_port);
et_message= (EditText) findViewById(R.id.et_message);
et_message.setText("GPS");
btn_connect = (Button) findViewById(R.id.btn_connect);
btn_GPS= (Button) findViewById(R.id.btn_send);
tv_transmit=(TextView) findViewById(R.id.tv_transmit);
tv_receive = (TextView) findViewById(R.id.tv_receive);
tv_device = (TextView) findViewById(R.id.tv_device);
// connection
btn_connect.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
TH=new Thread(new Runnable() {
@Override
public void run() {
try {
S = new Socket(et_IP_Address.getText().toString(),Integer.parseInt(et_port.getText().toString()));
DOS = new DataOutputStream(S.getOutputStream());
} catch (IOException e) {
e.printStackTrace();
}
}
});// End of thread
TH.start();
}
}); // end of buutton
// Sending
btn_GPS.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
TH2=new Thread(new Runnable() {
@Override
public void run() {
try {
while(!Thread.currentThread().isInterrupted()) {
DIS = new DataInputStream(S.getInputStream());
DOS2 = new DataOutputStream(S.getOutputStream());
DOS2.writeUTF(et_message.getText().toString());
tv_transmit.post(new Runnable() {
@Override
public void run() {
tv_transmit.setText(et_message.getText());
}
});
try {
DOS2.flush();
}
catch (IOException e) {
e.printStackTrace();
}
}
}
catch (IOException e) {
e.printStackTrace();
}
// CommunicationThread commThread = null;
// try {
// commThread = new CommunicationThread(S);
// } catch (IOException e) {
// e.printStackTrace();
// }
// new Thread(commThread).start();
//
try {
data = DIS.readUTF();
} catch (IOException e) {
e.printStackTrace();
}
data = data.toString();
tv_receive.post(new Runnable() {
public void run() {
tv_receive.setText(data);
}
});
try {
DOS2.close();
DIS.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}); // end of thread
TH2.start();
}
}); // end of button
}
// class CommunicationThread implements Runnable{
// private Socket ClientSocket;
// DataInputStream DIS;
// public CommunicationThread(Socket ClientSocket) throws IOException {
// this.ClientSocket = ClientSocket;
// }
// @Override
// public void run() {
// while (!Thread.currentThread().isInterrupted()){
// while(true){
// try {
// DIS = new DataInputStream(ClientSocket.getInputStream());
// data = DIS.readUTF();
// } catch (IOException e) {
// e.printStackTrace();
// }
// data = data.toString();
// tv_receive.post(new Runnable() {
// @Override
// public void run() {
// tv_receive.setText(data);
// }
// });
//
// }
//
// }
// }
// }
@Override
protected void onStop() {
super.onStop();
try {
S.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
我正在使用服务来保持连接打开