Working with Multiple Buttons

Demo:

1)main.xml:

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="fill_parent"

    android:layout_height="fill_parent"

    android:background="#5F04B4"

    android:orientation="vertical" >

    <Button

        android:id="@+id/button1"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_gravity="center"

        android:layout_marginTop="50dp"

        android:text="Button1" />

    <Button

        android:id="@+id/button2"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_gravity="center"

        android:layout_marginTop="50dp"

        android:text="Button2" />

    <Button

        android:id="@+id/button3"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_gravity="center"

        android:layout_marginTop="50dp"

        android:text="Button3" />

    <Button

        android:id="@+id/button4"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_gravity="center"

        android:layout_marginTop="50dp"

        android:text="Button4" />

</LinearLayout>

2)Activity: 

package com.venky.multiplebuttonsdemo;

import android.app.Activity;

import android.os.Bundle;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.Toast;

public class MultipleButtonsActivity extends Activity implements

            OnClickListener {

      /** Called when the activity is first created. */

      Button btn1, btn2, btn3, btn4;

      @Override

      public void onCreate(Bundle savedInstanceState) {

            super.onCreate(savedInstanceState);

            setContentView(R.layout.main);

            btn1 = (Button) findViewById(R.id.button1);

            btn2 = (Button) findViewById(R.id.button2);

            btn3 = (Button) findViewById(R.id.button3);

            btn4 = (Button) findViewById(R.id.button4);

            btn1.setOnClickListener(this);

            btn2.setOnClickListener(this);

            btn3.setOnClickListener(this);

            btn4.setOnClickListener(this);

      }

      @Override

      public void onClick(View v) {

            // TODO Auto-generated method stub

            switch (v.getId()) {

            case R.id.button1:

                  Toast.makeText(getApplicationContext(), "Button1 is Clicked",

                              Toast.LENGTH_SHORT).show();

                  break;

            case R.id.button2:

                  Toast.makeText(getApplicationContext(), "Button2 is Clicked",

                              Toast.LENGTH_SHORT).show();

                  break;

            case R.id.button3:

                  Toast.makeText(getApplicationContext(), "Button3 is Clicked",

                              Toast.LENGTH_SHORT).show();

                  break;

            case R.id.button4:

                  Toast.makeText(getApplicationContext(), "Button4 is Clicked",

                              Toast.LENGTH_SHORT).show();

                  break;

            }

      }

}

3)Download this Project Click Here