Android RadioGroup Example

On Android, a RadioGroup is a widget that groups multiple radio buttons. This allows the user to choose one option from a set of mutually exclusive options.

Here is the tutorial for Kotlin

Here is a simple example of using a RadioGroup in a RadioButton element:

There Are Some Common Attributes for RadioGroup

Step 1 :

File open res/layout/activity_main.xml file −

<?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:layout_height="match_parent"
    tools:context=".MainActivity">


    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:gravity="center"
        android:layout_margin="20dp"
        android:orientation="vertical">

        <RadioGroup
            android:id="@+id/radioGroup"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="vertical">
            <RadioButton android:id="@+id/radio_mango"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="Mango"/>
            <RadioButton android:id="@+id/radio_banana"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="Banana"/>
            <RadioButton android:id="@+id/radio_orange"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="Orange"/>
        </RadioGroup>


        <Button
            android:id="@+id/buttonSubmit"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="Submit" />

        <TextView
            android:id="@+id/textResult"
            android:layout_width="match_parent"
            android:gravity="center"
            android:textSize="20dp"
            android:layout_marginTop="20dp"
            android:layout_height="wrap_content"
            android:text="Show Result" />
    </LinearLayout>



</RelativeLayout>

Step 2 :

File open com.microappvalley.newtestproject/MainActivity.java file −

package com.microappvalley.newtestproject;


import androidx.appcompat.app.AppCompatActivity;

import android.annotation.SuppressLint;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.TextView;
import android.widget.Toast;


public class MainActivity extends AppCompatActivity {
 Button buttonSubmit;
 RadioGroup radioGroup;
 TextView textResult;
 

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        buttonSubmit=(Button) findViewById(R.id.buttonSubmit);
        radioGroup=(RadioGroup) findViewById(R.id.radioGroup);

        textResult=(TextView) findViewById(R.id.textResult);

        buttonSubmit.setOnClickListener(new View.OnClickListener() {
            @SuppressLint("NonConstantResourceId")
            @Override
            public void onClick(View view) {

                int id=radioGroup.getCheckedRadioButtonId();

                if(id==view.NO_ID){

                    Toast.makeText(MainActivity.this, "No Chackd", Toast.LENGTH_SHORT).show();
                }else {
                    RadioButton selectedRadioButton = findViewById(id);
                    textResult.setText(selectedRadioButton.getText().toString());
                    Toast.makeText(MainActivity.this, selectedRadioButton.getText().toString(), Toast.LENGTH_SHORT).show();
                }

            }
        });
    }

}

Open Device Manager, run the emulator, and  then run the application. Next, check the working output and check the output  you declared in your code.