How to use Radio Button in Alert Dialog in Android

In this android programming source code example, we are going to use Radio Button in Alert Dialog in Android.

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

Below is a step by step source code to use Radio Button in Alert Dialog in Android.

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    android:orientation="vertical" 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=".radiobutton.RadioButton11">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="RadioButton inside AlertDialog"/>

    <Button
        android:id="@+id/showAlert"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Show RadioButton"/>

</LinearLayout>

MainActivity.java

import android.os.Bundle;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;

public class RadioButton11 extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_radio_button11);

        Button button = findViewById(R.id.showAlert);
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                // Create a alert dialog builder.
                final AlertDialog.Builder builder = new AlertDialog.Builder(RadioButton11.this);
                // Set icon value.
                builder.setIcon(R.mipmap.ic_launcher);
                // Set title value.
                builder.setTitle("Alert Dialog with RadioButton");

                // Get custom login form view.
                final View customView = getLayoutInflater().inflate(R.layout.custom_radio_button, null);
                // Set above view in alert dialog.
                builder.setView(customView);
                builder.setCancelable(true);

                final AlertDialog alertdialog = builder.create();
                alertdialog.show();
            }

        });
    }
}

custom_radio_button.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="wrap_content">

    <RadioGroup
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <RadioButton
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="RadioButton1"/>

        <RadioButton
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="RadioButton2"/>

        <RadioButton
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="RadioButton3"/>

        <RadioButton
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="RadioButton4"/>

    </RadioGroup>

</LinearLayout>

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