[英]Android Client and PC Server communication using sockets
我在同一台PC上的android模擬器和服務器(java)上運行客戶端,並且正在使用套接字編程。 下面附上代碼。 兩者都運行良好,但是實際的數據傳輸沒有發生,也無法弄清楚。
服務器端(PC):
import java.net.*;
import java.io.*;
public class Server_tcp {
void run(){
{
try {
System.out.println("In 1st try blck");
try {
System.out.println("In 2nd try blck");
Boolean end = false;
ServerSocket ss = new ServerSocket(4444);
System.out.println("socket created");
while(!end){
//Server is waiting for client here, if needed
Socket s = ss.accept();
System.out.println("socket accepted");
BufferedReader input = new BufferedReader(new InputStreamReader(s.getInputStream()));
PrintWriter output = new PrintWriter(s.getOutputStream(),true); //Autoflush
String st = input.readLine();
System.out.println("Tcp Example" + "From client: "+st);
output.println("Good bye and thanks for all the fish :)");
s.close();
if (st==null){ end = true; }
}
ss.close();
} catch (UnknownHostException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
} catch (IOException exp) {
// TODO Auto-generated catch block
exp.printStackTrace();
}
}
}
public static void main(String args[])
{
Server_tcp server = new Server_tcp();
while(true){
server.run();
}
}
}
客戶端(Android):
package com.try3;
import android.app.Activity;
import android.os.Bundle;
import android.widget.EditText;
import java.io.*;
import java.net.*;
public class ClientTCPActivity extends Activity {
/** Called when the activity is first created. */
private EditText et;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
System.out.println("Before try net");
trynet();
System.out.println("after try net");
}
public void trynet() {
System.out.println("inside try net");
try {
System.out.println("inside try");
Socket s = new Socket("127.0.0.1",4444);
//outgoing stream redirect to socket
OutputStream out = (OutputStream) et.getContentDescription();
PrintWriter output = new PrintWriter(out);
output.println("Hello Android!");
BufferedReader input = new BufferedReader(new InputStreamReader(s.getInputStream()));
//read line(s)
String st = input.readLine();
System.out.println(st);
//Close connection
s.close();
System.out.println(" try ");
} catch (UnknownHostException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
在Android模擬器中,您應該使用的是10.0.2.2而不是127.0.0.1的PC
我不明白您要在這里做什么。
OutputStream out = (OutputStream) et.getContentDescription();
PrintWriter output = new PrintWriter(out);
您的意思是:
PrintWriter output = new PrintWriter(s.getOutputStream(),true);
??
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