Mobile Platforms and Application Development

Introduction to Platform-Based Development (PBDE401 | PBDV301)

• Department: Information Technology

• Lecturer: Freedom Khubisa

• Subject Codes: PBDE401 and PBDV301

• Topic: Intro: Mobile Platforms, Programming Languages, and Location-Aware Apps

• Institutional Framework (ENVISION2030): The Durban University of Technology (DUT) emphasizes core values including:     * Fairness     * Professionalism     * Commitment     * Compassion     * Excellence     * Transparency     * Honesty     * Integrity     * Respect     * Accountability

Lesson Objectives

• Definition and Purpose: Define mobile applications (apps) and explain their specific utility on mobile hardware like smartphones and tablets.

• Classification: Identify and distinguish between the three primary categories of mobile apps: Native, Cross-platform, and Hybrid.

• Hardware Interaction: Describe the mechanisms through which mobile apps interface with device hardware and Application Programming Interfaces (APIs).

• Value Proposition: Explain the specific benefits mobile apps provide to both individual users and business entities.

Components of Mobile Platforms

• Operating Systems (OS): The base software that manages hardware resources.

• Development Frameworks: The structured environments used to build applications.

• Programming Languages: The syntax and logic used to write the app code.

• Application Programming Interfaces (APIs): Protocols that allow apps to communicate with the OS and hardware.

• Tools: Software and environments (IDEs) used for development and debugging.

Analysis of Widely Used Mobile Platforms

Major Operating Systems

• Android: Currently the most widely used mobile OS globally.

• iOS: The platform for Apple mobile devices.

• HarmonyOS: Huawei’s proprietary operating system.

• KaiOS: An operating system for feature phones with smartphone-like capabilities.

Historical and Secondary Platforms

• Series 40 (Nokia)

• SymbianOS

• BlackBerry OS

• Samsung bada

• MeeGo

• Tizen

• Windows Phone

Mobile Operating System Market Share Analysis ($2009-2023$)

• Historical Data ($2009$):     * Symbian: $\approx 46.88\%$ market share.     * BlackBerry OS: $\approx 20.33\%$ market share.     * iOS: $\approx 14.75\%$ market share.     * Android: Significantly lower in the early period ($\approx 2.4\%$ in early $2009$).

• Recent Trends ($2017-2022$):     * Android Dominance: Stable at high percentages, reaching peak values such as $81.08\%$ in $2017$ and maintaining around $72.47\%$ in $3Q'22$.     * iOS Stability: Shows a steady presence, oscillating between $\approx 19.29\%$ (in $2017$) and $\approx 28.46\%$ (in $1Q'22$).     * Decline of Others: Platforms like Windows Phone and BlackBerry OS dropped to effectively $0\%$ by $2020$.     * KaiOS Presence: Maintains a small but distinct niche share, peaking around $0.76\%$ in $1Q'19$.

Mobile Platform Core Functions

• Process Management: Coordinating the execution of multiple applications and background services.

• Memory Management: Allocation and deallocation of system RAM to ensure smooth performance.

• Device & Hardware Management: Interfacing with the camera, microphone, sensors, and storage.

• Security Management: Handling permissions, encryption, and user data protection.

• User Interface (UI) Management: Rendering graphics and handling user touch/input events.

• Networking & Communication: Managing Wi-Fi, Bluetooth, mobile data, and NFC connections.

• Application Lifecycle Management: Controlling app states (e.g., Active, Background, Suspended, Terminated).

• Power & Battery Management: Optimizing energy consumption to extend device battery life.

Classification and Categories of Mobile Applications

Mobile applications are software programs specifically optimized for mobile hardware. Common categories include:

• Social Media: Tools for networking and content sharing (e.g., Instagram, Facebook, Twitter (X), TikTok, Snapchat).

• Messaging: Real-time communication platforms (e.g., WhatsApp, Telegram, Messenger).

• Entertainment: Media consumption services (e.g., Spotify, Netflix, YouTube).

• Productivity: Tools for professional and personal tasks (e.g., Microsoft Teams, Google Docs, Evernote, Zoom).

Mobile Application Development Strategies

Comparative Analysis: Native vs. Hybrid vs. Cross-Platform

Decision Framework for Development Approach

To choose an approach, developers should follow this logic:

1. Cost Constraint: If the app must be built as cheaply as possible, choose Hybrid.

2. Performance vs. Time: If limited performance is acceptable to reduce time-to-market, choose Hybrid.

3. Hardware Requirements: If hardware functions like Camera or GPS are essential requirements, consider Cross-platform or Native.

4. Application Type: E-commerce apps may benefit from Progressive Web App (PWA) approaches.

5. Team Resources: If the organization is ready to have two separate development teams for separate codebases, choose Native.

Mobile Programming Languages and Frameworks

• Swift: Primary language for native iOS development.

• Kotlin: Primary language for native Android development.

• JavaScript (JS): Used for React Native and Ionic frameworks.

• Dart: The language used for the Flutter framework.

• C#: Used with .NET MAUI (formerly Xamarin) for cross-platform development.

• PWA (Progressive Web Apps): Leverage web technologies to offer an app-like experience.

Mobile Platform Architectures

Architectural patterns define how logic, data, and UI interact:

• MVC (Model-View-Controller):     * Model: Data and logic.     * View: User interface.     * Controller: Handles input and updates the View/Model.

• MVP (Model-View-Presenter):     * Model: Data and logic.     * View: Interface that reflects the Presenter.     * Presenter: Acts as the logic layer between the View and Model.

• MVVM (Model-View-ViewModel):     * Model: Data source.     * View: Data-bound interface.     * ViewModel: Exposes data of the Model to the View.

Location-Aware Applications

These applications utilize geographic data to provide context-specific services. The primary technologies used include:

• GPS (Global Positioning System): Satellite-based positioning.

• Wi-Fi Positioning: Determining location based on nearby wireless networks.

• Cell Tower Triangulation: Using the signal strength and location of mobile carrier towers.

Benefits of Mobile Apps From a Business Perspective

• Brand and Marketing: Boost brand awareness, personalize marketing strategies, and maximize social media benefits.

• Customer Relations: Enhance customer connections, foster customer loyalty, and deliver continuous value.

• Growth and Engagement: Increase engagement levels, seize niche market opportunities, and drive revenue.

Key Factors to Consider in Mobile App Development

• Targeted Device: Identifying the specific OS platform.

• UI and UX: Prioritizing User Interface and User Experience design.

• Device Features: Ensuring access to native hardware features via APIs.

• Performance: Optimizing for speed and responsiveness.

• Scalability: Ensuring the app is easily upgradeable.

• Security: Protecting user data and system integrity.

• Cost: Balancing development budget with requirements.