How to dynamically enable and disable Radio Button in Kotlin

In this android kotlin source code example, we are going to dynamically enable and disable Radio Button in Kotlin.

You can copy and adopt this source code example to your Kotlin android project without reinventing the wheel.

Below is a step by step source code to dynamically enable and disable Radio Button in Kotlin.

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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=".TextViewAndRadioButton.TextViewAndRadioButtonActivity15">

    <RadioGroup
        android:id="@+id/radioGroup"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintBottom_toBottomOf="parent">
        <RadioButton
            android:id="@+id/maleBtn"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Male"/>
        <RadioButton
            android:id="@+id/femaleBtn"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Female"/>
    </RadioGroup>

    <Button
        android:id="@+id/enableRadioBtn"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@color/colorAccent"
        android:text="Enable RadioButton"
        android:textColor="#ffffff"
        android:layout_marginTop="10dp"
        app:layout_constraintTop_toBottomOf="@id/radioGroup"/>

    <Button
        android:id="@+id/disableRadioBtn"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@color/colorAccent"
        android:text="Disable RadioButton"
        android:textColor="#ffffff"
        android:layout_marginTop="10dp"
        app:layout_constraintTop_toBottomOf="@id/enableRadioBtn"/>

</androidx.constraintlayout.widget.ConstraintLayout>

MainActivity.kt

import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.widget.Button
import android.widget.RadioButton
import android.widget.RadioGroup
import com.bluapp.kotlinview.R

class TextViewAndRadioButtonActivity15 : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_text_view_and_radio_button15)
        val radioGroup = findViewById(R.id.radioGroup) as RadioGroup
        val enableRadioBtn = findViewById(R.id.enableRadioBtn) as Button
        val disableRadioBtn = findViewById(R.id.disableRadioBtn) as Button
        enableRadioBtn.setOnClickListener {
            for(i in 0 until radioGroup.childCount){
                radioGroup.getChildAt(i).isEnabled = true
            }
        }
        disableRadioBtn.setOnClickListener {
            for(i in 0 until radioGroup.childCount){
                radioGroup.getChildAt(i).isEnabled = false
            }
        }
    }
}

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