client.java

package com.example.serverclient;
 
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.net.InetAddress;
import java.net.Socket;
import java.net.UnknownHostException;

import android.annotation.SuppressLint;
import android.app.Activity;
import android.os.Bundle;
import android.os.StrictMode;
import android.util.Log;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.view.View;
 
public class SocketClient extends Activity {
   private Button bt;
   private TextView tv;
   private Socket socket;
   private String serverIpAddress = "192.168.43.23";
   
   private static final int REDIRECTED_SERVERPORT = 5000;
    
   public void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      
      setContentView(R.layout.main);
      bt = (Button) findViewById(R.id.myButton);
      tv = (TextView) findViewById(R.id.myTextView);
      con();
      
      bt.setOnClickListener(new OnClickListener() {
         public void onClick(View v) {
            try {
               EditText et = (EditText) findViewById(R.id.EditText01);
               String str = et.getText().toString();
               PrintWriter out = new PrintWriter(new BufferedWriter(new OutputStreamWriter(socket.getOutputStream())),true);
               out.println(str);
               Log.d("Client", "Client sent message");
            } catch (UnknownHostException e) {
               tv.setText("Error1");
               e.printStackTrace();
            } catch (IOException e) {
               tv.setText("Error2");
               e.printStackTrace();
            } catch (Exception e) {
               tv.setText(e.getMessage().toString());
               e.printStackTrace();
            }
         }
      });
   }
   
   @SuppressLint("NewApi")
   public void con() {
 	    if (android.os.Build.VERSION.SDK_INT > 9) {
 	          StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
 	          StrictMode.setThreadPolicy(policy);
 	    }
 		try {
 			InetAddress serverAddr = InetAddress.getByName(serverIpAddress);
 			socket = new Socket(serverAddr, REDIRECTED_SERVERPORT);
 		} catch (UnknownHostException e1) {
 			e1.printStackTrace();
 		} catch (IOException e1) {
 			e1.printStackTrace();
 		}
 	}
}