<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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=".SwitchExample"
     android:orientation="vertical"
     android:gravity="center"
     android:id="@+id/linearLayout">
   
     <Switch
         android:id="@+id/switchbutton"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         />
</LinearLayout>
                                    
                                  

                                    
                                            package com.example.widgets;
    
import android.graphics.Color;
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.LinearLayout;
import android.widget.Switch;
import android.widget.Toast;
   
public class SwitchExample extends AppCompatActivity {
   
    LinearLayout linearLayout;
    Switch aSwitch;
   
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_switch_example);

        linearLayout=(LinearLayout)findViewById(R.id.linearLayout);
        aSwitch=(Switch)findViewById(R.id.switchbutton);
        aSwitch.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (aSwitch.isChecked()){
                    linearLayout.setBackgroundColor(Color.CYAN);
                    Toast.makeText(getApplicationContext(),"Switch is clicked & background is cyan",Toast.LENGTH_SHORT).show();
                }else{
                    linearLayout.setBackgroundColor(Color.RED);
                    Toast.makeText(getApplicationContext(),"Switch is clicked & background is red",Toast.LENGTH_SHORT).show();
                }
            }
        });
    }
}
                                    
                                  

                                    
                                        package com.example.widgets

import android.graphics.Color
import android.os.Bundle
import android.view.View
import android.widget.LinearLayout
import android.widget.Switch
import android.widget.Toast
import androidx.appcompat.app.AppCompatActivity

class SwitchExample : AppCompatActivity() {

    private lateinit var linearLayout: LinearLayout
    private lateinit var aSwitch: Switch

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_switch_example)

        linearLayout = findViewById(R.id.linearLayout)
        aSwitch = findViewById(R.id.switchbutton)

        aSwitch.setOnClickListener {
            if (aSwitch.isChecked) {
                linearLayout.setBackgroundColor(Color.CYAN)
                Toast.makeText(applicationContext, "Switch is clicked & background is cyan", Toast.LENGTH_SHORT).show()
            } else {
                linearLayout.setBackgroundColor(Color.RED)
                Toast.makeText(applicationContext, "Switch is clicked & background is red", Toast.LENGTH_SHORT).show()
            }
        }
    }
}