[英]Android application using Socket to send and receive messages:
我有一個Android應用程序,我試圖使用套接字連接發送和接收消息到服務器。
我有各種各樣的問題發送和接收。 我一直都能做到這一點,兩者都沒有。
我想知道是否有人可以幫助我進行一個簡單的練習,我可以使用BufferedReader
和PrintWriter
進行編譯。
我很感激任何幫助,因為我正在放棄。
在此先感謝....以下是我嘗試過的一些鏡頭(雖然它們與這個問題無關,但我希望它表明我在嘗試之前已經嘗試過)。
private OnClickListener sendClickListener = new OnClickListener(){
public void onClick(View arg0) {
Thread cThread = new Thread(new ClientThread());
cThread.start();
}};
public class ClientThread implements Runnable {
public void run() {
try {
EditText dstAddress = (EditText) findViewById(R.id.destinationAddress);
EditText dstMessage = (EditText) findViewById(R.id.messageToTranslate);
EditText dstPort = (EditText) findViewById(R.id.destinationPort);
String address = dstAddress.getText().toString();
String message = dstMessage.getText().toString();
int port = Integer.parseInt(dstPort.getText().toString());
InetAddress serverAddr = InetAddress.getByName(address);
Log.d(".Coursework", "C: Connecting...");
Socket socket = new Socket(serverAddr, port);
connected = true;
while (connected) {
try {
EditText dstTranslation = (EditText) findViewById(R.id.returnedTranslation);
dstTranslation.setText("help me");
Log.d(".Coursework", "C: Sending command.");
PrintWriter out;
out = new PrintWriter(new BufferedWriter(new OutputStreamWriter(socket.getOutputStream())), true);
out.println(language);
out.println(message);
Log.d("ClientActivity", "C: Sent.");
//BufferedReader in;
//in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
//String translation = in.readLine();
} catch (Exception e) {
Log.e("ClientActivity", "S: Error", e);
}
}
socket.close();
Log.d("ClientActivity", "C: Closed.");
} catch (Exception e) {
Log.e("ClientActivity", "C: Error", e);
connected = false;
}
}
public class ClientConnection {
String address, language, message;
int portNumber;
Socket clientSocket = null;
public ClientConnection(String lan, String mes, String add, int pn) throws IOException{
address = add;
portNumber = pn;
language = lan;
message = mes;
}
public String createAndSend() throws IOException{
// Create and connect the socket
Socket clientSocket = null;
clientSocket = new Socket(address, portNumber);
PrintWriter pw = new PrintWriter(clientSocket.getOutputStream(),true);
BufferedReader br = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));
// Send first message - Message is being correctly received
pw.write(language+"\n");
pw.flush();
// Send off the data
// Send the second message - Message is being correctly received
pw.write(message+"\n");
pw.flush();
pw.close();
// Send off the data
// NOTE: Either I am not receiving the message correctly or I am not sending it from the server properly.
String translatedMessage = br.readLine();
System.out.print(translatedMessage);
br.close();
//Log.d("application_name",translatedMessage); Trying to check the contents begin returned from the server.
return "Say What??";
}
import java.io.BufferedOutputStream;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;
public class ServerConnection {
public static void main(String[] args) throws Exception {
// Delete - Using while loop to keep connection open permanently.
boolean status = false;
while( !status){
ServerSocket serverSocket = null;
try {
serverSocket = new ServerSocket(4444);
} catch (IOException e) {
System.err.println("Could not listen on port: 4444.");
System.exit(1);
}
Socket clientSocket = null;
try {
clientSocket = serverSocket.accept();
} catch (IOException e) {
System.err.println("Accept failed.");
System.exit(1);
}
// Delete - Working as of here, connection is established and program runs awaiting connection on 4444
BufferedReader br = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));
String language = br.readLine();
String message = br.readLine();
// Test - Works
System.out.println(language);
// Test - Works
System.out.println(message);
// Delete - Working as of here, both messages are passed and applied. Messages are received as sent from client.
TranslateMessage tm = new TranslateMessage();
String translatedMessage = tm.translateMessage(language, message);
// NOTE: This seems to be where I am going wrong, either I am not sending the message correctly or I am not receiving it correctly..
// PrintWriter writer = new PrintWriter(new BufferedOutputStream(clientSocket.getOutputStream()));
PrintWriter pw = new PrintWriter(clientSocket.getOutputStream(),true);
// Send translation back
System.out.println(translatedMessage);
pw.write(translatedMessage+"\n");
pw.write("Return test \n"); // Test message!
pw.flush();
// Send off the data
pw.close();
br.close();
clientSocket.close();
serverSocket.close();
}
}
}
我只是忽略了關閉客戶端的套接字連接。 因此,雖然我懷疑我所做的是對我自己的問題的模型回答,但它包括在內。
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