Android Playground 🚀

A comprehensive Android development playground featuring multiple modules for learning, practicing, and mastering Android development concepts, Data Structures & Algorithms, and System Design.

📁 Project Structure

This project is organized into multiple modules and learning resources:

🏗️ Core Modules

1. app - Main Android Application

• Purpose: Primary Android application module with Jetpack Compose
• Package: com.example.androidplayground
• Key Features:
  • Modern Android development with Jetpack Compose
  • Material 3 design system
  • Edge-to-edge UI support
  • Compose-based UI components
• Technology Stack:
  • Kotlin
  • Jetpack Compose
  • Material 3
  • AndroidX libraries
• Build Configuration:
  • Compile SDK: 35
  • Min SDK: 24
  • Target SDK: 34
  • JVM Target: 1.8

2. dsa - Data Structures & Algorithms Module

• Purpose: Dedicated module for practicing DSA problems and algorithms
• Package: com.example.dsa
• Key Features:
  • Array and Hashing problems
  • Basic programming algorithms
  • Interactive problem-solving environment
• Contents:
  • Array_Hashing/ - Collection of array-based problems:
    • AnagramString.kt - Anagram detection algorithms
    • ConcatenationOfArray.kt - Array concatenation solutions
    • DuplicateItemInArray.kt - Duplicate detection in arrays
    • TwoSumArray.kt - Two Sum problem implementations
  • BasicPrograms.kt - Fundamental algorithms:
    • Palindrome detection
    • Fibonacci sequence generation
    • Anagram checking
    • Prime number validation
    • Factorial calculation
    • String reversal
    • Number swapping without third variable
    • Second largest element finding
    • Smallest word extraction

📚 Learning Resources

3. androidInteview/ - Android Interview Preparation

• Purpose: Comprehensive collection of Android interview resources and notes
• Contents:
  • android-interview-questions.md - Links to interview resources and experiences
  • Android.md - Advanced Android concepts and best practices:
    • Coroutines and Dispatchers
    • Main thread handling with Dispatchers.Main.immediate
    • CoroutineExceptionHandler and supervisorScope
    • withContext(NonCancellable) usage
    • ViewModel scope management
    • yield() function usage
  • Java.md - Java-specific interview topics
  • kotlin.md - Kotlin language concepts (placeholder)

4. SystemDesign/ - System Design Learning Path

• Purpose: Structured learning path for mobile system design
• Contents:
  • SystemDesignRoadmap/ - 8-week learning curriculum:
    • RoadMap.md - Complete learning roadmap with weekly goals:
      • Week 1: Foundations of System Design
      • Week 2: Android App Architecture & Clean Code
      • Week 3: Networking & APIs
      • Week 4: Data Storage & Offline Sync
      • Week 5: Authentication & Security
      • Additional weeks covering advanced topics
    • Concepts.md - Core system design concepts and principles
    • Week1.md - Detailed Week 1 curriculum and exercises

🔧 Build Configuration

Gradle Configuration

• Root: Multi-module Android project with Gradle Kotlin DSL
• Version Management: Centralized dependency management via gradle/libs.versions.toml
• Modules:
  • :app - Main application
  • :dsa - Data Structures & Algorithms module

Dependencies

Both modules include:

• AndroidX Core KTX
• Lifecycle Runtime
• Activity Compose
• Compose BOM
• Material 3
• Testing frameworks (JUnit, Espresso)

🚀 Getting Started

Prerequisites

• Android Studio Hedgehog or later
• JDK 11 or higher
• Android SDK 35
• Kotlin 1.9+

Setup Instructions

1. Clone the repository
2. Open in Android Studio
3. Sync Gradle files
4. Build the project
5. Run either the app or dsa module

Running the Applications

• Main App: Run the app module to see the basic Android Compose application
• DSA Module: Run the dsa module to access the algorithms playground

📖 Learning Path

For Android Development

1. Start with the app module to understand basic Compose UI
2. Study the interview resources in androidInteview/
3. Practice with the DSA problems in the dsa module
4. Follow the system design roadmap in SystemDesign/

For DSA Practice

1. Explore BasicPrograms.kt for fundamental algorithms
2. Work through the Array_Hashing/ problems
3. Implement and test your solutions
4. Compare with existing implementations

For System Design

1. Begin with SystemDesign/SystemDesignRoadmap/RoadMap.md
2. Follow the 8-week curriculum
3. Complete weekly deliverables
4. Practice with mock questions provided

📝 Contributing

1. Fork the repository
2. Create a feature branch
3. Add your implementations or improvements
4. Write tests for new functionality
5. Submit a pull request

🤝 Support

For questions or contributions, please open an issue or submit a pull request.

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Happy Coding! 🎉