The Remixed Dungeon project uses a sophisticated platform abstraction system that allows the game to run on multiple platforms (Android, Desktop, Web) and distribution channels (Google Play, F-Droid, ruStore, etc.) while sharing the majority of core game logic. Understanding this system is crucial for developing cross-platform mods.

The platform abstraction system separates platform-specific functionality from the core game code using:

• Interface-based abstraction - Common interfaces and base classes that define contracts for platform-specific functionality
• Class replacement - Different implementations of the same class for different platforms
• Build system integration - Platform-specific code inclusion at build time

The game uses product flavors to support different markets:

• Google Play - Full analytics and crash reporting through Firebase
• F-Droid - No analytics, stub implementations to meet F-Droid requirements
• ruStore - Russian market specific features
• Desktop - No analytics, file-based storage
• Web - Browser-based functionality

One of the most important examples for modders is the EventCollector class, which handles analytics and crash reporting:

• Core Usage (in your mod code):

    import com.nyrds.platform.EventCollector;
 
    // Used throughout your mod
    EventCollector.logEvent("mod_started");
    EventCollector.logException(e);
 

• Market-Specific Implementations:
  • src/googlePlay/java/com/nyrds/platform/EventCollector.java - Full Firebase implementation
  • src/fdroid/java/com/nyrds/platform/EventCollector.java - Empty stub implementation
  • src/ruStore/java/com/nyrds/platform/EventCollector.java - Minimal logging implementation
  • src/libgdx/java/com/nyrds/platform/EventCollector.java - Desktop implementation

The build system automatically selects the correct implementation based on the selected flavor.

The preferences system is another important abstraction:

• Android - Uses encrypted SharedPreferences
• Desktop - Uses HJSON file-based storage
• Web - Uses browser localStorage

When creating mods that need platform-specific features:

Always use the existing platform abstraction classes rather than platform-specific APIs directly:

// Good - uses platform abstraction
import com.nyrds.platform.storage.Preferences;
 
Preferences.INSTANCE.put("music_volume", 0.8);
float volume = Preferences.INSTANCE.getFloat("music_volume", 1.0f);
 
// Avoid - platform-specific APIs
SharedPreferences prefs = context.getSharedPreferences(...); // Android-only

For complex platform-specific functionality, you can check which platform you're on:

import com.nyrds.platform.PlatformSupport;
 
if(PlatformSupport.isAndroid()) {
    // Android-specific code
} else if(PlatformSupport.isDesktop()) {
    // Desktop-specific code
}

If your mod needs platform-specific functionality, create the abstraction in your mod the same way the main game does:

1. Define the interface or abstract class in your shared code 2. Implement platform-specific versions in respective flavor directories 3. Use the same fully-qualified class name for all implementations

When developing mods, test on multiple platforms if possible, particularly:

• Android Google Play - Full feature set
• Android F-Droid - No analytics, may have different feature restrictions
• Desktop - Different storage and input methods

• Preferences - Key-value storage
• FileSystem - File operations with SAF support on Android

• MusicManager - Background music
• Sample - Sound effects

• EventCollector - Logging events and exceptions

• Touchscreen - Touch and mouse input abstraction
• Keys - Keyboard input abstraction

1. Always use the existing platform abstraction classes
2. Test your mod on different platform flavors when possible
3. Use stub implementations in F-Droid flavor to comply with privacy requirements
4. Follow the package structure used by the main game
5. Don't make assumptions about platform-specific behavior

Understanding the platform abstraction system will help you create mods that work across all platforms and distribution channels where Remixed Dungeon is available.