Program to select gender using radio button |Android Program|

activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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:layout_height="match_parent" tools:context=".MainActivity"  
  android:orientation="vertical">
 <RadioGroup
       android:id="@+id/radioGroup"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" >

        <RadioButton
            android:id="@+id/radioMale"
            android:layout_width="match_parent" 
           android:layout_height="wrap_content" 
           android:text="Male" />

        <RadioButton   
         android:id="@+id/radioFemale"  
          android:layout_width="match_parent"   
         android:layout_height="wrap_content"    
        android:text="Female" />
    </RadioGroup>

    <Button    
    android:id="@+id/buttonDisplay"
        android:layout_marginLeft="130sp"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Show" />
</LinearLayout>

MainActivity.java

package com.example.radiobutton;
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.Toast;

import java.util.RandomAccess;

public class MainActivity extends AppCompatActivity {

    RadioGroup radioGroup;
    RadioButton radioButton;
    Button show;

    @Override    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        radioGroup=findViewById(R.id.radioGroup);
        show=findViewById(R.id.buttonDisplay);

        show.setOnClickListener(new View.OnClickListener() {
            @Override            public void onClick(View v) {
                int selectedId=radioGroup.getCheckedRadioButtonId();

                radioButton=findViewById(selectedId);
                Toast.makeText(MainActivity.this,radioButton.getText(),Toast.LENGTH_LONG).show();
            }
        });

    }
}

Design