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:

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

```mermaid 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

```

Task Workflow State Management

```mermaid 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

```

Decompose Integration with Clean Architecture

```mermaid 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

```

📚 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.