Working with Multiple Buttons(Anonymous Inner Type)

activity_main.xml
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<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">



    <Button

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="Button1"

        android:id="@+id/button"

        android:layout_marginTop="5dp"

        android:layout_alignParentTop="true"

        android:layout_centerHorizontal="true" />



    <Button

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="Button2"

        android:id="@+id/button2"

        android:layout_below="@+id/button"

        android:layout_centerHorizontal="true"

        android:layout_marginTop="52dp" />



    <Button

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="Button3"

        android:id="@+id/button3"

        android:layout_centerVertical="true"

        android:layout_centerHorizontal="true" />

</RelativeLayout>




MainActiivity.Java
-------------------
package com.anil.android.multiplebuttonusingnewonclicklistner;



import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

import android.view.Menu;

import android.view.MenuItem;

import android.view.View;

import android.widget.Button;

import android.widget.Toast;



public class MainActivity extends AppCompatActivity {

    Button btn1,btn2,btn3;



    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

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

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

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

        btn1.setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View v) {



          Toast.makeText(getApplicationContext(),"Button1 is Working",5000).show();





            }

        });

        btn2.setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View v) {

          Toast.makeText(getApplicationContext(),"Button2 is Working",5000).show();



            }

        });

        btn3.setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View v) {

          Toast.makeText(getApplicationContext(),"Button3 is Working",5000).show();



            }

        });



    }



}




Output is :
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