Greetings!
We have recently published 100+ articles on android tutorials with kotlin and java. If you need, you may visit Android Tutorial for beginners page. You can also check Kotlin Tutorial for beginners. Also, if you are interested in content writing, you can mail us at tutorialwing@gmail.com.Hello Reader! In this post, we are going to learn about how to create android radio button programmatically in kotlin. We will also learn how to add radio button in radio group dynamically.
Output

Tutorialwing Android Kotlin Dynamic Radio Button Output
Getting Started
At first, we will create an android application. Then, we will create radio button dynamically and use it in the application.
1. Creating New Project In Kotlin
Follow the steps below to create new project. Please ignore the steps if you have already created a new project.
Step | Description |
---|---|
1. | Open Android Studio. |
2. | Go to File => New => New Project. Write application name as DynamicRadioButton. Then, check Include Kotlin Support and click next button. |
3. | Select minimum SDK you need. However, we have selected 17 as minimum SDK. Then, click next button |
4. | Then, select Empty Activity => click next => click finish. |
5. | At this point, You will get a newly created android project successfully. |
2. Modify Values Folder
Open res/values/strings.xml file. Then, add below code into it.
<resources> <string name="app_name">DynamicRadioButtonUsingKotlin</string> <string name="male">Male</string> <string name="female">Female</string> <string name="you_selected">You selected:</string> </resources>
Other values folder have not been changed. So, we are not going to mention it here.
3. Modify Layout Folder
Open res/layout/activity_main.xml file. Then, add below code into it.
<?xml version="1.0" encoding="utf-8"?> <LinearLayout android:id="@+id/rootContainer" xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:gravity="center" android:orientation="vertical"> <RadioGroup android:id="@+id/radioGroup" android:layout_width="match_parent" android:layout_height="wrap_content" android:paddingStart="20dp"> </RadioGroup> </LinearLayout>
In activity_main.xml file, we have added a radio group (having id radioGroup) that will act as container for the radio buttons created dynamically in kotlin file in the project.
4. Create Android Radio Button Programmatically in Kotlin
Open app/src/main/java/com.tutorialwing.dynamicradiobutton/MainActivity.kt file. Then, add below code into it.
package com.tutorialwing.dynamicradiobutton import android.os.Bundle import android.support.v7.app.AppCompatActivity import android.view.ViewGroup import android.widget.LinearLayout import android.widget.RadioButton import android.widget.RadioGroup import android.widget.Toast class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) val linearLayout = findViewById<LinearLayout>(R.id.rootContainer) // Create RadioButton Dynamically val radioButton1 = RadioButton(this) radioButton1.layoutParams = LinearLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT) radioButton1.setText(R.string.male) radioButton1.id = 0 val radioButton2 = RadioButton(this) radioButton2.layoutParams = LinearLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT) radioButton2.setText(R.string.female) radioButton2.id = 1 val radioGroup = findViewById<RadioGroup>(R.id.radioGroup) if (radioGroup != null) { radioGroup.addView(radioButton1) radioGroup.addView(radioButton2) radioGroup.setOnCheckedChangeListener { group, checkedId -> var text = getString(R.string.you_selected) text += " " + getString(if (checkedId == 0) R.string.male else R.string.female) Toast.makeText(applicationContext, text, Toast.LENGTH_SHORT).show() } } } }
In this file, we have created two radio buttons dynamically. Then, we have added these radio buttons in radio group. After that, we have added a listener in radio group to show toast message whenever radio buttons selection change in radio group.
Since AndroidManifest.xml file is very important in any android application, we are going to see the content inside this file.
AndroidManifest.xml file
Code inside src/main/AndroidManifest.xml file is –
<?xml version="1.0" encoding="utf-8"?> <manifest package="com.tutorialwing.dynamicradiobutton" xmlns:android="http://schemas.android.com/apk/res/android"> <application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:roundIcon="@mipmap/ic_launcher_round" android:supportsRtl="true" android:theme="@style/AppTheme"> <activity android:name=".MainActivity"> <intent-filter> <action android:name="android.intent.action.MAIN"/> <category android:name="android.intent.category.LAUNCHER"/> </intent-filter> </activity> </application> </manifest>
When we run the application, we will get output as shown above.
That’s end of tutorial on Creating Android Radio Button programmatically in kotlin.