radio button android studio example

Hello Guys. Welcome to our new tutorial of radio button in android using android studio. select one option in android we use radio button in android. in this tutorial, we will implement the android radio button in your application. please follow the code given below to display the radio button in android.

• First Create a new project in Android Studio
• File ⇒ New Android ⇒ Application Project
• Then Open src -> package -> MainActivity.java and then add following code :

JAVA (MainActivity.java)

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.RadioButton;
import android.widget.Toast;

public class RadioButtons extends Activity {
    RadioButton delhi, mumbai, Goa, kolkata;

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

        delhi = (RadioButton)findViewById(R.id.Delhi);
        Goa = (RadioButton)findViewById(R.id.Goa);
        mumbai = (RadioButton)findViewById(R.id.mumbai);
        kolkata = (RadioButton)findViewById(R.id.kolkata);
        Button btn = (Button)findViewById(R.id.btn);
        btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String result = "My favourite city: ";
                result+= (delhi.isChecked())?"Delhi":(Goa.isChecked())?"Goa":(mumbai.isChecked())?"Mumbai":(kolkata.isChecked())?"Kolkata":"";
                Toast.makeText(getApplicationContext(), result, Toast.LENGTH_SHORT).show();
            }
        });
    }
    public void onRadioButtonClicked(View view) {
        boolean checked = ((RadioButton) view).isChecked();
        String str="";
        // Check which radio button was clicked
        switch(view.getId()) {
            case R.id.Delhi:
                if(checked)
                    str = "Delhi Selected";
                break;
            case R.id.Goa:
                if(checked)
                    str = "Goa Selected";
                break;
            case R.id.mumbai:
                if(checked)
                    str = "Mumbai Selected";
                break;
            case R.id.kolkata:
                if(checked)
                    str = "Kolkata Selected";
                break;
        }
        Toast.makeText(getApplicationContext(), str, Toast.LENGTH_SHORT).show();
    }
}

XML (activity_main.xml)

<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:background="#F2F2F2"
    xmlns:tools="http://schemas.android.com/tools"
    tools:context=".RadioButtons"
    android:layout_height="match_parent">
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="150dp"
            android:layout_marginLeft="100dp"
            android:textSize="18dp"
            android:text="What is your favorite city"
            android:textStyle="bold"
            android:id="@+id/txtView"/>
        <RadioGroup
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="vertical"
            android:id="@+id/rdGroup"
            android:layout_below="@+id/txtView">
            <RadioButton
                android:id="@+id/mumbai"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:padding="10dp"
                android:layout_marginLeft="100dp"
                android:text="Mumbai"
                android:onClick="onRadioButtonClicked"/>
            <RadioButton
                android:id="@+id/kolkata"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:padding="10dp"
                android:layout_marginLeft="100dp"
                android:text="Kolkata"
                android:onClick="onRadioButtonClicked"/>
            <RadioButton
                android:id="@+id/Delhi"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:padding="10dp"
                android:layout_marginLeft="100dp"
                android:text="Delhi"
                android:onClick="onRadioButtonClicked"/>
            <RadioButton
                android:id="@+id/Goa"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:padding="10dp"
                android:layout_marginLeft="100dp"
                android:text="Goa"
                android:onClick="onRadioButtonClicked"/>
        </RadioGroup>

    <Button
        android:id="@+id/btn"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_alignStart="@+id/txtView"
        android:layout_marginBottom="70dp"
        android:text="Confirm" />
    </RelativeLayout>

Output:

Finally, run this project.

This is how Radio button in android look like.