代写IMSE2113、Java，c/c++编程设计代做

日期：2024-04-19 08:26

Department of Industrial and Manufacturing Systems Engineering

IMSE2113 Information Systems

Assignment 2

Building A Barcode-enabled Android App for

Displaying Product Information

Objectives

In a department store, a barcode label affixed to a product's packaging or container serves various

purposes for users, such as inventory checking, payment, and product information inquiry. To support

these functionalities, product information associated with a specific barcode must be created and

managed using an information system that incorporates a database. Subsequently, users can

conveniently utilize a computer application, such as a web or mobile app, to scan the barcode label and

access the relevant product information.

This assignment aims to provide students with a hands-on experience in designing and building a mobile

app for displaying food product information by scanning the barcode label on the food packaging.

Upon completion of this individual assignment, students are expected to develop the following skills:

1. Designing and building an Android app using the Microsoft .NET MAUI.

2. Scanning the barcode label attached to the food packaging.

3. Retrieving product information from a public Web API within the Android app. The Web API

"https://world.openfoodfacts.org/api/v0/product/<barcode>.json" will be utilized.

4. Generating an APK file for the Android app.

Major Tasks

Each student is required to design and develop an Android mobile app with the following features:

1. A user interface (UI) that allows users to enter a barcode using an on-screen keyboard.

2. A UI that enables users to scan food packaging’s barcodes, such as 1D EAN barcode and 2D

QR CODE, and then the app can retrieve related food product information by making a request

to the Web API "https://world.openfoodfacts.org/api/v0/product/<barcode>.json".

3. The UI should display common product information, such as the brand name, product name,

product images, ingredients, and more.

Additionally, students are expected to prepare a comprehensive user manual with clear instructions for

guiding users how to use the mobile app.

Items for Submission

Each student is required to submit the following:

1. A mobile app APK file and its corresponding source code.

2. A comprehensive user manual with detailed instructions guides users how to operate the mobile

app.

3. A short video demonstrating the step-by-step process of operating the mobile app.

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Assessments

Each student's system will be assessed and graded according to the following criteria:

1. UX/UI design

? Aesthetics

? User-friendliness

? Creativity and originality

2. System Design and Implementation

? Functionality

? Clarity of the source code

? Documentation

Submission Date

Please zip all submission files as a zip file (e.g., Student_ID.7z) and submit the zip file to Moodle by

11:59 pm on 26 April 2023.

(Note: Please submit an online drive link for downloading your work if its size is very big)

Information about barcode labels and web API

Barcode labels attached to products offer valuable assistance to users across various applications,

including inventory management, supply chain tracking, product identification, and point-of-sale

automation. The provided figures showcase examples of barcode labels affixed to the packaging of food

products.

EAN-13 and UPC-A are two widely used barcode formats commonly found on food product packaging.

The EAN-13 barcode format is designed to encode 13-digit numbers, while the UPC-A barcode format

encodes 12-digit numbers. These formats are primarily utilized in specific regions, with UPC-A being

predominantly used in the United States and Canada, while EAN-13 is adopted globally. Barcode data

is typically stored as textual information in databases and serves as a key for product identification.

Barcode

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The table below presents several examples of barcodes:

Product Format Barcode

(Numbers stored

in a database)

Barcode

(Printed on a label)

Nutella Ferrero

750 g

EAN-13 3017620421006

Coca Cola

1.25L

EAN-13 5449000267412

Spam, 25% less

sodium 336g

UPC-A 037600115445

The Android mobile app will integrate a free Web API service offered by "Open Food Facts." This

platform operates as a collaborative, free, and open database for food products worldwide. To fetch

product data, students will utilize the Web API using the following URL format:

https://world.openfoodfacts.org/api/v0/product/[barcode].json. When using this URL, students should

replace the placeholder [barcode] with either an EAN-13 or a UPC-A barcode. The Web API will

respond with the requested data in JSON format.

The table below presents an example of using this Web API:

An HTTP Request

sent to the Web

API

https://world.openfoodfacts.org/api/v0/product/0037600115445.json

An HTTP

Response received

from the Web API

if the product is

found

JSON data of the product would be found in the response.

The above image is a screenshot captured from the Firefox browser. Notably,

Firefox incorporates a built-in JSON data browser, which facilitates the display

of JSON data in a format that is both easy to read and comprehend.

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The JSON data contains an element named 'status' that serves as an indicator

of the web API's status. When the value of 'status' is equal to 1, it signifies that

a product has been located in the database. In such cases, the product details

can be accessed within the 'product' element.

Within the 'product' element, there is an element called 'image_url' that

specifically stores the URL of the product photo.

The 'product' element contains an element called 'ingredients_text' that stores

a list of ingredients.

An HTTP

Response received

from the Web API

if the product is

not found