Project Work

Personal expenses tracking application with a minimalistic yet modern design.

Time to find out where the money goes.

Team members

• Jacopo Zanetti: Focus on Data and Domain Layers, realization of class diagrams and documentation.
• Enerel Tumurkhuu: Focus on UI Layer (UI Classes and xml files), and UI/UX Design on Figma.
• Gabriel Concepcion: Focus on UI Layer (UI Classes and xml files), realization of presentation video.

Features

• Material Design 3.
• Material You dynamic colors, in icons and UI elements.
• 100% offline, data is saved locally and never leaves your device.
• Privacy respecting, no permissions required.
• Track your transactions details:
  • Date,
  • Amount,
  • Note,
  • Category,
  • Account.
• Follow your account balances, whether starting from zero or an existing balance.
• Monthly statistics based on transaction categories.
• Sensible colors to differentiate expenses and incomes.
• Filter transactions per category or account.
• Sensible presentation of data with built-in sorting logic.

Compliance with project requirements

• English-only codebase
• 100% Java, support Android 10 or higher
• Make extensive use of Java's rich type system
  • Abstract classes
  • Static methods
  • Interfaces
  • Generics
  • Enums
• OOP Design Patterns
  • Singletons
  • Inheritance and Polymorphism
  • SOLID principles
• Data Structures
  • ArrayLists are widely used throughout the code
  • HashMaps are used when convenient over ArrayLists
  • Many different POJOs definted according to use case
• Android's officially recommended app architecture
  • UI Layer
    • Activities and Fragments
    • FlexBox Layouts with Recycler Views
    • UI Elements
      • Navigation Bar
      • Tool Bar
      • Material CardViews
      • Dropdown Menus
      • Date Picker
      • Material Buttons
  • Domain Layer
    • UseCases
  • Data Layer
    • Repositories
    • DataSources
• Android architectural principles
  • Unidirectional Data Flow
  • Single Source of Truth
  • One-shot CRUD APIs exposed by the Data Layer

Class Diagram

Modifiers Convention

• Abstract : Italics
• Static : Underlined
• Final : ALL_CAPS

Click on the diagram to open it full-screen. Tip: You may zoom out to gain a broad overview.

Screenshots