Decompose Tutorial

Decompose helps you build applications that are organized, focused, not overwhelming, and enjoyable to develop.

A comprehensive tutorial project showcasing Decompose for building reactive, component-based architectures in Kotlin Android development. This project demonstrates how to create modular, maintainable, and testable applications with proper separation of concerns.

📱 App Overview

This Todo app demonstrates Decompose's capabilities to manage component lifecycles, state, and navigation in a clean, predictable way. It follows reactive programming principles and showcases proper separation of concerns.

The app allows users to:

• Create and manage tasks with different priorities
• Track task progress through multiple states
• View statistics about task completion
• Customize the app appearance

✨ Key Features

• Component-Based Architecture: Independent UI components with their own lifecycle
• Predictable State Management: Immutable state and unidirectional data flow
• Type-Safe Navigation: No more fragment transactions or intent flags
• Multi-Module Support: Clean separation between features and layers
• Composable-Friendly Design: Natural integration with Jetpack Compose
• Workflow Management: Task state progression from Todo → In Progress → Done

📋 Task Workflow Management

The app demonstrates a clear task progression workflow with different states:

Todo → In Progress → Done

The app provides smart workflow features:

• Contextual tips for better productivity
• Visual indicators for task status
• Priority levels shown with color coding
• Deadline tracking for time-sensitive tasks

🛠️ Task Management Features

Create New Tasks Add titles, descriptions, tags, deadlines, and priorities	Task Details View complete information and manage task status

📊 Statistics and Customization

Productivity Stats Track completion rates and task distribution	App Settings Customize theme and app preferences

🖥️ Dark Mode Support

🧩 Technical Architecture

This application demonstrates Decompose's powerful capabilities for component-based architecture:

Core Architecture

graph TD
    A[Application] --> B[RootComponent]
    B --> C[TodoListComponent]
    B --> D[StatisticsComponent]
    B --> E[SettingsComponent]
    
    C --> F[TaskItemComponent]
    C --> G[TaskEditorComponent]
    
    style A fill:#f9f,stroke:#333,stroke-width:2px
    style B fill:#bbf,stroke:#333,stroke-width:2px
    style C fill:#dfd,stroke:#333,stroke-width:2px
    style D fill:#dfd,stroke:#333,stroke-width:2px
    style E fill:#dfd,stroke:#333,stroke-width:2px

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Task Workflow State Management

stateDiagram-v2
    classDef todo fill:#ffcccb,stroke:#333,stroke-width:1px
    classDef inProgress fill:#ffffcc,stroke:#333,stroke-width:1px
    classDef done fill:#ccffcc,stroke:#333,stroke-width:1px
    
    [*] --> TODO : New Task
    
    TODO --> IN_PROGRESS : Start Task
    IN_PROGRESS --> DONE : Complete Task
    IN_PROGRESS --> TODO : Return to Todo
    DONE --> IN_PROGRESS : Reopen Task
    
    class TODO todo
    class IN_PROGRESS inProgress
    class DONE done

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Decompose Integration with Clean Architecture

graph TD
    subgraph Presentation
        A[Jetpack Compose UI] -->|Observes| B[Decompose Component]
        B -->|Contains| C[Component State]
    end
    
    subgraph Domain
        E[Use Cases]
        F[Domain Models]
        G[Repository Interfaces]
    end
    
    subgraph Data
        H[Repository Implementations]
        I[Data Sources]
    end
    
    B -->|Invokes| E
    E -->|Uses| F
    E -->|Calls| G
    G <--Implementation--> H
    H -->|Accesses| I
    
    style A fill:#dfd,stroke:#333,stroke-width:2px
    style B fill:#bbf,stroke:#333,stroke-width:2px
    style E fill:#ffd,stroke:#333,stroke-width:2px
    style H fill:#fcc,stroke:#333,stroke-width:2px

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📚 Additional Resources

• Decompose Documentation
• Sample Code Repository
• Component-Based Architecture Guide

🔧 Setup and Installation

1. Clone the repository
2. Open in Android Studio Iguana or later
3. Build and run on your device or emulator

📝 License

This project is licensed under the MIT License - see the LICENSE file for details.