LinkStack

LinkStack is a modern Android application for efficiently managing and organizing your links. Built with Clean Architecture and modern Android development practices, it offers a robust solution for saving, categorizing, and accessing your important links.

Project Status

• 🚀 Active Development
• 📱 Android 12+ Support
• 🎨 Material Design 3 Implementation
• 🔒 Security Updates
• ♿ Accessibility Improvements

Design & User Experience

The app follows Material Design 3 principles with focus on:

• Dynamic Color Theming
• Adaptive Layouts
• Consistent Typography
• Motion and Animation
• Accessibility Features
  • TalkBack Support
  • Content Descriptions
  • High Contrast Themes
  • Customizable Text Size

Performance & Security

Performance Optimizations

• Efficient database queries with Room
• Background processing with WorkManager
• Memory management with Kotlin Flows
• Image loading optimization
• View recycling in lists

Security Features

• Encrypted data storage
• Secure GitHub authentication
• API key protection
• Safe network operations
• Input validation and sanitization

Features

• Link Management: Save and organize links with custom tags
• Smart Search: Quickly find links using advanced search capabilities
• GitHub Sync: Backup and sync your links with GitHub
• HackerNews Integration: Share and interact with HackerNews community
• Reminder System: Set reminders for saved links
• Theme Customization: Personalize your app experience
• Offline Support: Access your links without internet connection
• Tag Organization: Categorize links with custom tags for better organization

Screens

• Home: Main screen displaying all saved links with filtering options
• Search: Advanced search functionality with tag-based and text-based search
• Add/Edit Link: Form to add new links or edit existing ones with tag management
• Settings: App configuration including theme preferences and GitHub sync settings
• WebView: Built-in browser for viewing saved links

Link Types

The app supports various link types with specialized handling:

• Articles
• Videos
• Social Media Posts
• Documentation
• GitHub Repositories
• General Links

Reminder System

Linkstack includes a sophisticated reminder system that:

• Allows setting custom reminders for saved links
• Supports different reminder frequencies
• Uses WorkManager for reliable background processing
• Sends notifications to revisit important links
• Manages reminder states and history

Testing

The project includes comprehensive testing:

• Unit Tests: Testing business logic and repositories
• Integration Tests: Testing database and network operations
• UI Tests: Testing Compose UI components
• Mock Repositories: For testing in isolation

Architecture

The app follows Clean Architecture principles with a clear separation of concerns:

com.hp77.Linkstack/
├── data/                 # Data Layer
│   ├── local/           # Room Database
│   ├── remote/          # Network Services
│   ├── repository/      # Repository Implementations
│   ├── mapper/          # Data Mappers
│   └── preferences/     # DataStore Preferences
├── domain/              # Domain Layer
│   ├── model/           # Domain Models
│   ├── repository/      # Repository Interfaces
│   └── usecase/         # Business Logic
└── presentation/        # UI Layer
    ├── components/      # Reusable UI Components
    ├── home/           # Home Screen
    ├── search/         # Search Screen
    ├── settings/       # Settings Screen
    └── webview/        # WebView Screen

Development Practices

• Clean Architecture: Strict separation of concerns with data, domain, and presentation layers
• SOLID Principles: Following SOLID principles for maintainable and scalable code
• Repository Pattern: Abstract data sources behind repository interfaces
• Use Cases: Single responsibility principle applied to business logic
• Dependency Injection: Using Hilt for clean dependency management
• State Management: Using sealed classes for UI states and events
• Error Handling: Comprehensive error handling with custom Logger utility
• Code Style: Following Kotlin coding conventions and best practices

Database Schema

The app uses Room database with the following main entities:

• LinkEntity: Stores link information (URL, title, type, etc.)
• TagEntity: Stores tag information
• LinkTagCrossRef: Many-to-many relationship between links and tags
• Migrations: Versioned database migrations for schema updates

HackerNews Integration

The app integrates with HackerNews API to:

• Share links to HackerNews community
• View HackerNews discussions
• Track share status and engagement
• Handle HackerNews authentication

Tech Stack

• UI: Jetpack Compose - Modern Android UI toolkit
• Architecture Pattern: MVVM + Clean Architecture
• Dependency Injection: Hilt - Simplified DI for Android
• Local Storage: Room - SQLite abstraction layer
• Networking: Retrofit - Type-safe HTTP client
• Asynchronous Programming: Kotlin Coroutines & Flow
• Preferences: DataStore - Data storage solution

Getting Started

Prerequisites

• Android Studio Arctic Fox or later
• JDK 11 or later
• Android SDK 21 or later

Setup

1. Clone the repository:

git clone https://github.com/yourusername/Linkstack.git

2. Open the project in Android Studio

3. Add your GitHub API credentials in local.properties:

github.client_id=your_client_id
github.client_secret=your_client_secret

4. Build and run the project

Building the App

Debug Build

# Generate debug APK
./gradlew assembleDebug

# The APK will be available at:
# app/build/outputs/apk/debug/app-debug.apk

Release Build

1. Create a keystore file (if you don't have one):

keytool -genkey -v -keystore linkstash.keystore -alias linkstash -keyalg RSA -keysize 2048 -validity 10000

2. Add keystore information in local.properties:

keystore.path=linkstash.keystore
keystore.password=your_keystore_password
keystore.alias=linkstash
keystore.alias_password=your_key_password

3. Generate release APK:

# Generate signed release APK
./gradlew assembleRelease

# The APK will be available at:
# app/build/outputs/apk/release/app-release.apk

Android App Bundle

For Play Store distribution:

# Generate Android App Bundle (AAB)
./gradlew bundleRelease

# The AAB will be available at:
# app/build/outputs/bundle/release/app-release.aab

Build Variants

• Debug: Development version with debugging enabled
• Release: Optimized version with ProGuard rules applied
• Both variants support different product flavors if configured

Contributing

1. Fork the repository
2. Create your feature branch (git checkout -b feature/AmazingFeature)
3. Commit your changes (git commit -m 'Add some AmazingFeature')
4. Push to the branch (git push origin feature/AmazingFeature)
5. Open a Pull Request

GitHub Sync

Linkstack provides seamless GitHub integration:

• Backup links to a GitHub repository
• Sync across multiple devices
• Version control for your link collection
• Secure authentication using GitHub OAuth
• Automatic conflict resolution

License

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

Learning Resources & Best Practices

Architecture & Design Patterns

• Clean Architecture - Understanding the architectural principles
• Guide to App Architecture - Android's official architecture guide
• Repository Pattern - Data layer abstraction
• Use Case Pattern - Business logic organization

Modern Android Development

• Jetpack Compose - Modern UI toolkit
• Material Design 3 - Design system
• Kotlin Flows - Reactive programming
• WorkManager - Background processing
• Room Database - Local persistence

Testing

• Android Testing - Comprehensive testing guide
• Testing Compose - UI testing
• Repository Testing - Data layer testing

Performance

• App Performance - Performance best practices
• Memory Management - Memory optimization
• Database Performance - Room optimization

Security

• Security Best Practices - Android security
• OAuth Implementation - Authentication
• Encryption - Data security