Android Simple Messenger Project

Hello Friends Today I Dedicate To.... Simple Messenger Android Project source code is explained in this article. Simple messenger app is useful for adding friends and sent text messages to friends individually and in a group.

Project Overview:

There are many messenger based android apps which are available for free download.  This app is developed with minimum features for text messaging. 

Simple messenger project is useful as final year android project for students.

 Activity Main.xml

Activitymain.xml file is executed at the first time when application is executed. This will load basic design layout like height, width, background.

<span style="font-size: small; font-family: georgia, palatino;"><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent" 
android:layout_height="match_parent"
tools:context=".MainActivity" >

<ListView
android:id="@android:id/list"
android:layout_width="match_parent"
android:layout_marginBottom="60sp"
android:stackFromBottom="true"
android:layout_height="400sp" >

</ListView>
<EditText
android:id="@+id/editText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:hint="@string/text_hint"
android:layout_alignParentLeft="true"
android:inputType="text"
android:ems="10" >

</EditText>

<Button
android:id="@+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:onClick="sendMessage"
android:text="@string/button" />

</RelativeLayout></span>

Java Code: 

Simple messenger java file will handle constructing of messages, creating buffer sending data using socket. 

<span style="font-size: small; font-family: georgia, palatino;">package com.example.simplemessenger;

import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStreamReader;

import java.io.PrintWriter;

import java.net.ServerSocket;

import java.net.Socket;

import java.net.UnknownHostException;

import java.text.SimpleDateFormat;

import java.util.ArrayList;

import java.util.Calendar;

import java.util.Locale;

import android.app.ListActivity;

import android.content.Context;

import android.os.AsyncTask;

import android.os.Bundle;

import android.telephony.TelephonyManager;

import android.view.View;

import android.widget.ArrayAdapter;

import android.widget.EditText;

import android.widget.Toast;

public class SimpleMessenger extends ListActivity 

{

private String send_ClientMessage;

private int emulator_instance;

final String localHost="10.0.2.2";

private SimpleDateFormat df;

ArrayList<String> as;

ArrayAdapter<String> a;

@Override

protected void onCreate(Bundle savedInstanceState) 

{

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

TelephonyManager tel = (TelephonyManager) this.getSystemService(Context.TELEPHONY_SERVICE);

String portStr = tel.getLine1Number().substring(tel.getLine1Number().length() - 4);

emulator_instance=Integer.parseInt(portStr);

as=new ArrayList<String>();

a=new ArrayAdapter<String>(this, R.layout.text_listview, as);

setListAdapter(a);

createServer();

df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss",Locale.US);

}

private void createServer() 

{

new Thread(new Runnable()

{

public void run()

{

try 

{

ServerSocket s = new ServerSocket(10000);

while(true)

{

Socket ss=s.accept();

String msg_ServerSide=null;

BufferedReader br=new BufferedReader(new InputStreamReader(ss.getInputStream()));

while((msg_ServerSide=br.readLine())!=null)

{

System.out.println();

if(!msg_ServerSide.isEmpty())

{

new displayMessage().execute(msg_ServerSide);

}

} 

br.close();

ss.close();

}

} catch (IOException e) 

{

e.printStackTrace();

}

}

}).start();

}

class displayMessage extends AsyncTask<String, Integer, String>

{

@Override

protected String doInBackground(String... params) 

{

return params[0];

}

@Override

protected void onPostExecute(String result) 

{

super.onPostExecute(result);

String time=df.format(Calendar.getInstance().getTime());

String time_now=time.substring(11, 16);

a.add(result+"\t"+"\t"+time_now);

Toast.makeText(getApplicationContext(), result,Toast.LENGTH_SHORT).show();

} 

}

public void sendMessage(View v)

{

EditText ed=(EditText)findViewById(R.id.editText);

send_ClientMessage=ed.getText().toString();

sendToServer();

ed.setText(null);

}

private void sendToServer() 

{

new Thread(new Runnable()

{

public void run()

{

Socket s=null;

try {

if(emulator_instance == 5554)

{

s=new Socket(localHost,11112);

}

else if(emulator_instance == 5556)

{

s=new Socket(localHost,11108); 

}

sendandUpdate(s);

s.close();

} catch (UnknownHostException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

}

}

}).start(); 

}

private void sendandUpdate(Socket s) throws IOException 

{

PrintWriter pw = new PrintWriter(s.getOutputStream());

pw.println(send_ClientMessage);

pw.close();

s.close();

}

}</span>

Click Hear To Download...!!

Download Now

• Tweet
• Share
• Share
• Share
• Share

About Nikunj Satasiya

I am a passionate programmer and a Software Engineer love blogging and developing applications in Microsoft Technologies.

Related Post