CheckBox with Examples Android

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent">
    <CheckBox
        android:id="@+id/chkCricket"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:padding="10dp"
        android:layout_marginTop="150dp"
        android:layout_marginLeft="100dp"
        android:text="Cricket"
        />
    <CheckBox
        android:id="@+id/chkFootball"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:padding="10dp"
        android:layout_marginLeft="100dp"
        android:text="Football"
        />
    <CheckBox
        android:id="@+id/chkHockey"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:padding="10dp"
        android:layout_marginLeft="100dp"
        android:text="Hockey"
        />
    <Button
        android:id="@+id/getBtn"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginLeft="100dp"
        android:background="#bf00ff"
        android:textColor="#FFFFFF"
        android:minHeight="30dp"
        android:text="Submit" />
</LinearLayout>

MainActivity.java

package com.example.chcekboxexample;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.CheckBox;

public class MainActivity extends AppCompatActivity {
    CheckBox android, java, angular, python;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        android = (CheckBox)findViewById(R.id.chkCricket);
        java = (CheckBox)findViewById(R.id.chkFootball);
        python = (CheckBox)findViewById(R.id.chkHockey);
        Button btn = (Button)findViewById(R.id.getBtn);
    }
}