Android CheckBoxDemo

                                      Android CheckBox

Android CheckBox is a type of two state button either checked or unchecked.

There can be a lot of usage of checkboxes. For example, it can be used to know the hobby of the user, activate/deactivate the specific action etc.

Android CheckBox class is the subclass of CompoundButton class.

Android CheckBox Class

The android.wifget.CheckBox class provides the facility of creating the CheckBox.

Method of CheckBox class

There are many inherited method of View, TextView, and Button classes in the CheckBox class. Some of them are as follows:

Method	Description
Public Boolean isChecked()	Returns true if it is checked otherwise false.
Public void setChecked(Boolean status)	Changes the state of the CheckBox.

Android CheckBox Example

Activity_manin.xml

File:activity_main.xml

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

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

    android:layout_width="match_parent"

    android:layout_height="match_parent">

    <CheckBox

        android:id="@+id/checkBox1"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_centerHorizontal="true"

        android:layout_marginTop="25dp"

        android:textSize="25sp"

        android:text="Pizza"/>

    <CheckBox

        android:id="@+id/checkBox2"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_below="@+id/checkBox1"

        android:layout_marginTop="15dp"

        android:layout_centerHorizontal="true"

        android:textSize="25sp"

        android:text="Coffe"/>

    <CheckBox

        android:id="@+id/checkBox3"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_below="@+id/checkBox2"

        android:layout_marginTop="15sp"

        android:textSize="25sp"

        android:text="Burger"

        android:layout_centerHorizontal="true"/>

    <Button

        android:id="@+id/button1"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_centerHorizontal="true"

        android:text="Order"

        android:layout_marginTop="30dp"

        android:layout_below="@+id/checkBox3"/>

</RelativeLayout>

Activity Class

File:MainActivity.java

package com.mahesh.androidissimples.checkboxdemo;

import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

import android.view.View;

import android.widget.Button;

import android.widget.CheckBox;

import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    CheckBox pizza,coffe,burger;

    Button buttonOrder;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        addListenerOnButtonClick();

    }

    private void addListenerOnButtonClick() {

        //Getting instance of CheckBoxes and Button from the activity_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);

        buttonOrder.setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View v) {

                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(MainActivity.this, result.toString(), Toast.LENGTH_SHORT).show();

            }

        });

    }

}

Output: