How to perform button operation in android & add Button events By WeRCopyPasteDeveloper

                                


                                                      activity_main.xml

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

<RelativeLayout 

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

 xmlns:app="http://schemas.android.com/apk/res-auto" 

 xmlns:tools="http://schemas.android.com/tools" 

 android:layout_width="match_parent"     

 android:orientation="vertical" 

 android:layout_height="match_parent" 

 tools:context=".MainActivity">
    <Button 

    android:id="@+id/b1" 

    android:layout_width="wrap_content"         

    android:layout_height="wrap_content"         

    android:layout_alignParentBottom="true"         

    android:layout_centerHorizontal="true" 

    android:layout_marginBottom="235dp" 

    android:gravity="center" 

    android:text="SHOW" /> 

</RelativeLayout>

                                                 Main_Activivity.java

package com.spam.madhav.buttonexp;
import android.support.v7.app.AppCompatActivity; 

import android.os.Bundle; 

import android.view.View; 

import android.widget.Button; 

import android.widget.Toast;

public class MainActivity extends AppCompatActivity {
Button b1;


    @Override     

    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);         

        setContentView(R.layout.activity_main); 

        b1=(Button)findViewById(R.id.b1); 

        b1.setOnClickListener(new View.OnClickListener() {
        @Override 

         public void onClick(View v) {
        Toast.makeText(getApplicationContext(),"CopyPasteDeveloper",Toast.LENGTH_LONG)

        .show();     

        }
      });
     }
}

How to perform button operation in android & add Button events By WeRCopyPasteDeveloper