Android Working With Check boxes

Step 1 :

Make an android project named “CheckboxExample”.

Step 2 :

Paste the following code in MainActivity.java file.

package com.example.checkboxexample;

import android.app.Activity;

import android.os.Bundle;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.CheckBox;

import android.widget.Toast;

public class MainActivity extends Activity

{

       CheckBox pizza, coffe, burger;

       Button buttonOrder;

       @Override

       protected void onCreate(Bundle savedInstanceState) {

              super.onCreate(savedInstanceState);

              setContentView(R.layout.activity_main);

              addListenerOnButtonClick();

       }

       public void addListenerOnButtonClick() {

              // Getting instance of CheckBoxes and Button from the activty_main.xml

              // file

              pizza = (CheckBox) findViewById(R.id.checkBox1);

              coffe = (CheckBox) findViewById(R.id.checkBox2);

              burger = (CheckBox) findViewById(R.id.checkBox3);

              buttonOrder = (Button) findViewById(R.id.button1);

              // Applying the Listener on the Button click

              buttonOrder.setOnClickListener(new OnClickListener() {

                     @Override

                     public void onClick(View view) {

                           int totalamount = 0;

                           StringBuilder result = new StringBuilder();

                           result.append("Selected Items:");

                           if (pizza.isChecked()) {

                                  result.append("\nPizza 100Rs");

                                  totalamount += 100;

                           }

                           if (coffe.isChecked()) {

                                  result.append("\nCoffe 50Rs");

                                  totalamount += 50;

                           }

                           if (burger.isChecked()) {

                                  result.append("\nBurger 120Rs");

                                  totalamount += 120;

                           }

                           result.append("\nTotal: " + totalamount + "Rs");

                           // Displaying the message on the toast

                           Toast.makeText(getApplicationContext(), result.toString(),

                                         Toast.LENGTH_LONG).show();

                     }

              });

       }

}

Step 3 :

Paste the following code in activity_main.xml file.

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

    android:layout_width="fill_parent"

    android:layout_height="fill_parent"

    android:orientation="vertical" >

    <CheckBox

        android:id="@+id/checkBox1"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="Pizza" />

    <CheckBox

        android:id="@+id/checkBox2"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="Coffee" />

    <CheckBox

        android:id="@+id/checkBox3"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="Burger" />

    <Button

        android:id="@+id/button1"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="Order" />

</LinearLayout>