Radio button validation in android

This program is for radio button validation.

Step 1)Put below code in your main java file 

package project.test;

import android.app.Activity;

import android.os.Bundle;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.RadioButton;

import android.widget.RadioGroup;

import android.widget.Toast;

public class TestprojectActivity extends Activity {

    /** Called when the activity is first created. */

         private RadioGroup radioSexGroup;

         private RadioButton radioSexButton;

         private Button btnDisplay;

      

       @Override

    public void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);

    setContentView(R.layout.main);

    addListenerOnButton();

    }

      

       public void addListenerOnButton() {

               

              radioSexGroup = (RadioGroup) findViewById(R.id.radioSex);

              btnDisplay = (Button) findViewById(R.id.btnDisplay);

              btnDisplay.setOnClickListener(new OnClickListener() {

        

                      public void onClick(View v) {

        

                             // get selected radio button from radioGroup

                           int selectedId = radioSexGroup.getCheckedRadioButtonId();

        

                           // find the radiobutton by returned id

                             radioSexButton = (RadioButton) findViewById(selectedId);

        

                           Toast.makeText(TestprojectActivity.this,

                                  radioSexButton.getText(), Toast.LENGTH_SHORT).show();

                     }

        

              });

          

       }

}

Step 2) Here is the code for your main.xml file

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:orientation="vertical"

    android:layout_width="fill_parent"

    android:layout_height="fill_parent"

    >

<RadioGroup

        android:id="@+id/radioSex"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content" >

        <RadioButton

            android:id="@+id/radioMale"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:text="@string/radio_male"

            android:checked="true" />

        <RadioButton

            android:id="@+id/radioFemale"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:text="@string/radio_female" />

    </RadioGroup>

    <Button

        android:id="@+id/btnDisplay"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="@string/btn_display" />

</LinearLayout>

Step 3)Put below code in your string.xml file

<?xml version="1.0" encoding="utf-8"?>

<resources>

    <string name="hello">Hello World, MyAndroidAppActivity!</string>

    <string name="app_name">MyAndroidApp</string>

    <string name="radio_male">Male</string>

    <string name="radio_female">Female</string>

    <string name="btn_display">Display</string>

</resources>