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How to add radio button list in alert dialog?

This example demonstrate about how to add radio button list in alert dialog

Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.

Step 2 − Add the following code to res/layout/activity_main.xml.

<?xml version = "1.0" encoding = "utf-8"?>
<LinearLayout xmlns:android = "http://schemas.android.com/apk/res/android"
   android:layout_width = "match_parent"
   android:gravity = "center"
   android:layout_height = "match_parent">
      android:id = "@+id/click"
      android:layout_width = "wrap_content"
      android:textSize = "30sp"
      android:layout_height = "wrap_content"
      android:text = "Click"/>

In the above code, we have taken text view.

Step 3 − Add the following code to src/MainActivity.java

package com.example.myapplication;
import android.annotation.TargetApi;
import android.content.DialogInterface;
import android.os.Build;
import android.os.Bundle;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Switch;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {
   TextView text;
   public void onCreate(Bundle savedInstanceState) {
      text = findViewById(R.id.click);
      text.setOnClickListener(new View.OnClickListener() {
         public void onClick(View v) {
   private void showAlertDialog() {
      AlertDialog.Builder alertDialog = new AlertDialog.Builder(MainActivity.this);
      String[] items = {"java","android","Data Structures","HTML","CSS"};
      int checkedItem = 1;
      alertDialog.setSingleChoiceItems(items, checkedItem, new DialogInterface.OnClickListener() {
         public void onClick(DialogInterface dialog, int which) {
            switch (which) {
               case 0:
                  Toast.makeText(MainActivity.this, "Clicked on java", Toast.LENGTH_LONG).show();
               case 1:
                  Toast.makeText(MainActivity.this, "Clicked on android", Toast.LENGTH_LONG).show();
               case 2:
                  Toast.makeText(MainActivity.this, "Clicked on Data Structures", Toast.LENGTH_LONG).show();
               case 3:
                  Toast.makeText(MainActivity.this, "Clicked on HTML", Toast.LENGTH_LONG).show();
               case 4:
                  Toast.makeText(MainActivity.this, "Clicked on CSS", Toast.LENGTH_LONG).show();
      AlertDialog alert = alertDialog.create();

Let's try to run your application. I assume you have connected your actual Android Mobile device with your computer. To run the app from android studio, open one of your project's activity files and click Run  icon from the toolbar. Select your mobile device as an option and then check your mobile device which will display your default screen –

Now click on textview to open Alert Dialog.