Simple Task Manager (Jetpack Compose)

A simple task management Android app built using modern Android architecture with Jetpack Compose, MVVM, and StateFlow.

This project was created to using modern Android development patterns while building a functional task management application.

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Features

• Add tasks using bottom input field
• Toggle task completion
• Delete tasks
• Filter tasks:
  • All
  • Active
  • Completed
• Bottom input UX for easier one-hand usage
• Clean architecture with repository layer

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Tech Stack

• Kotlin
• Jetpack Compose
• Material 3
• MVVM Architecture
• StateFlow
• Repository Pattern

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Project Architecture

The project follows a layered architecture:

UI (Compose)
↓
ViewModel
↓
Repository Interface
↓
Repository Implementation (In-Memory)

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Folder Structure

ui/
   home/
      HomeScreen.kt
      HomeViewModel.kt
      HomeUiState.kt

domain/
   model/
      Task.kt

data/
   repository/
      TaskRepository.kt
      TaskRepositoryImpl.kt

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How It Works

• The ViewModel manages UI state using StateFlow.
• The Repository layer handles task operations like add, toggle, and delete.
• The UI collects state using collectAsState() and automatically recomposes when data changes.

Example:

val state by viewModel.uiState.collectAsState()

This ensures the UI always reflects the latest application state.

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UX Improvements

Some small UX improvements implemented:

• Bottom task input for easier reach
• Keyboard Done action adds tasks
• Keyboard automatically dismisses after submission
• Filter chips highlight the selected filter
• Empty state messages when there are no tasks

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Future Improvements

Planned improvements for the project:

• Room database for persistence
• Coroutines for async data operations
• Loading and error state handling
• Edit task functionality
• Undo delete with Snackbar
• Unit tests for ViewModel
• Dependency injection (Hilt)

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