Subject Code & Title :- ITECH2000 Mobile Development Fundamentals
Assignment Type :- Assessment 3
Overview :-
You will implement in AppInventor a multi-screen app, based on a given project specification. This app will use a range of components taught up to and including Week 11 of the course. You will also submit a brief report containing pseudocode and a description of how your solution utilises various concepts learned in class.
ITECH2000 Assessment Mobile Development Fundamentals
Learning Outcomes Assessed
The following course learning outcomes are assessed by completing this assessment.
K1. Understand constructs typical of many programming languages such as: variables expressions assignment sequence selection iteration procedures parameters return values.
A1. Design, develop, test and debug mobile apps from a given textual program specification.
S1. Analyse the input, processing and output needs of small programming problems.
S2. Design code sequences to realise algorithms in a programming language.
S3. Design basic user interfaces and develop storyboards to convey designed interaction sequences.
S5. Develop test cases to ensure correct behaviour.
Assessment Details
This assignment contains two parts: an app and a brief report.
1. App Details :
Your assignment is to develop an Android application using MIT AppInventor which is a general knowledge trivia app. The app should utilise programming concepts covered in class from Weeks 2 –10 including persistence of data using files and databases the dictionary data structure web and networking functionality and sorting algorithms.
The application should contain several screens to fulfill the requirements described below. You are free to design the interfaces of your app as you like, but your solution should also meet the requirements in a logical way.
Specifically the logic requirements that must be supported in the app are as follows:
• When the application is first opened there should be a screen that provides users with a way to select the game difficulty easy medium or hard and start a new game and view high scores.
• There should be a separate screen in which the trivia questions are displayed opened from the first screen. When this trivia screen opens it should load questions of the selected difficulty following the following logic:
o If the device is currently connected to the network, questions should be loaded from the Open Trivia Data base API as described in the API section of this document.
o If the device is not connected to the network questions should be loaded from the provided text files which contain static question data retrieved from the Open Trivia Database API.
• A single question should be displayed at a time including its category question text and four possible answers including the correct answer and three incorrect answers in a random order. The user should be able to select one of these answers at which point the following should occur:
o If the selected answer is the correct answer, the user’s score is incremented by 1 point (the current score should also be visible on the trivia screen). The user should then be prompted as to whether they wish to continue the game or end it. If they choose to continue a new question is displayed and the process repeats.
o If the selected answer is incorrect, the user should be made aware that they selected the wrong answer, and the correct answer should be shown. The app should then navigate to another screen where the user can save their score to a database, passing the achieved score with it.
• The save score screen should have a mechanism for the user to enter their name, which along with their score and a current date and timestamp, should be saved to a database. Once the value is saved, the app should navigate back to the main screen.
• There should be a separate screen on which users can view the high scores by loading them from the data base and displaying in an appropriate UI component. The following additional functionality should exist on this screen:
o There should be a way for the user to sort the scores, based on your implementation of a sorting algorithm. The scores can be sorted by the score value, alphabetical order of the user’s name, or the date timestamp – you only need to support one of these.
o The user should also be able to delete a score, which will remove it from the display and the database entirely.
Downloading trivia questions from the Open Trivia Database using the API The Open Trivia Database API should be used to download the trivia questions used in this app when a network connection is available. You can get a random list of questions of a particular difficulty in JSON format using the following URL – all you need to do is replace <#> with a positive integer, and with the preferred difficulty easy medium or hard as required:
ITECH2000 Assessment Mobile Development Fundamentals
For example,will give 20 random questions of hard difficulty. Note that the type parameter is set to “multiple”, so that multiple-choice questions are returned. The encode parameter specifies how special characters are rendered in text, in this case it is set to URL Encoding In order to correctly display any of the text in your app, you’ll need to use the [.Uri Decode] block (as shown below), which can be accessed from any Web type block you add to your app. For example, the RFC 3986 text that is displayed in the example image below would be decoded to “What country is not a part of Scandinavia?”
It is recommended that you visit the Open Trivia DB API link in a browser and view the JSON in a web browser to get a feel for its structure. You will see that the JSON data contains an array (results) of questions, with each question containing a range of information that describes the question, its category, correct_answer, and incorrect_answers. Your app should extract this data and load into an appropriate data structure to achieve the required functionality for this assignment.
General Requirements for Coding
While your app should meet the functionality described above, you need to ensure that you demonstrate the concepts we have covered in ITECH2000 so far. To achieve full marks, you will need to ensure that you have correctly made use of each of the following components, constructs or concepts somewhere in your app:
• Dictionary
• WebViewer and/or Web component
• ListView or ListPicker
• TinyDB and File
• Local and global variables
• Procedures
ITECH2000 Assessment Mobile Development Fundamentals
You should follow best practices for coding that we have described this semester, including the use of procedures to promote code reuse. Make sure you thoroughly test your application to ensure that it is robust.
Please read through all of the requirements before you commence work on the app, so you get a full sense of what is required to be done. It is recommended that you first model any events using pseudo code before commencing programming.
ITECH2000 Assessment Mobile Development Fundamentals
Brief Report :
As well as completing the program described above in App Inventor, you are also required to submit a brief report that includes the following :
• A title page that includes your name and student ID number.
• Pseudo code describing the behaviour of two (2) events that your app will respond to. Ensure that you clearly label your pseudo code so that it is clear what aspect you are modelling.
• For each of the design components/blocks listed in the previous section (General Requirements for Coding), you should describe in 2-3 sentences how you used the component(s) in your solution and justify why. If you have used a component multiple times, please describe one example. Note: There are 6 in total.
• A description of how you tested your application to ensure that it functioned correctly, with respect to user inputs outputs and networking.
Getting Assistance and Clarification :
If any part of the task is unclear to you or you are not quite sure how to do some aspect of the task you should either contact your lecturer directly via email or in person while you are in class or else post a question to the Discussion Forum on Moodle. How ever any questions posted to the forum on Moodle should not include anything that you plan to submit such as screenshots of code you might want to submit.
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