NativeModMenu

High-Performance In-Memory Dex Loader for Android

NativeModMenu is a sophisticated reimplementation of the LGL Android Mod Menu. It leverages InMemoryDexClassLoader to load the Java UI layer directly from system memory, eliminating the need for physical .dex files on the device storage.

---

Technical Overview

This implementation focuses on stealth and efficiency by embedding the FloatingModMenu.dex as a HEX-encoded string within the native binary. At runtime, the JNI layer performs a dynamic bootstrap to initialize the menu without leaving any traces in the application's assets or data folders.

Key Architectural Differences

• Zero Disk Footprint: No external dex file is shipped; the menu exists only in memory.
• Volatile Loading: Utilizes dalvik.system.InMemoryDexClassLoader for runtime execution.
• Native-Led Initialization: The entire menu lifecycle is managed via JNI native bindings.
• Reduced Attack Surface: Eliminates file-based detection vectors by avoiding asset extraction.
• Native Compatibility: Fully compatible with existing LGL Java menu logic.

---

Core Logic Flow

1. Data Embedding: The menu.dex is converted to a HEX string and compiled into the C++ source.
2. Buffer Reconstruction: At runtime, the HEX string is decoded into a ByteBuffer.
3. Class Loading: The InMemoryDexClassLoader interprets the buffer and loads the com.android.support.Menu class.
4. JNI Registration: Native functions are dynamically bound to the Java class methods.
5. Execution: The binJava() entry point triggers Menu.antik(Context) to render the UI.

---

JNI Native Interface

The following methods are registered dynamically to bridge the Native and Java layers:

Method	Functionality
Icon()	Returns the primary menu icon
IconWebViewData()	Manages WebView icon resources
getFeatureList()	Retrieves the feature configuration array
settingsList()	Retrieves the menu settings configuration
Changes(...)	Main event handler for feature toggles
setTitleText(...)	Customizes the UI title appearance
setHeadingText(...)	Customizes the UI heading appearance

---

Implementation Details

Requirements

• Android Version: 8.0 (API 26) or higher
• Architecture: ARMv7, ARM64-v8a
• Environment: Native JNI-based injection

Entry Point

// Executed post JNI_OnLoad
void binJava(); 

The binJava function is responsible for retrieving the Application context via ActivityThread and initiating the memory-loading sequence.

---

Legal Notice

This project is developed strictly for educational and research purposes. Modifying the runtime behavior of third-party applications may violate their Terms of Service. The developers assume no liability for misuse.

Acknowledgments

• Original Architecture: LGL Android Mod Menu
• Lead Developer: AntikMods
• Memory Loading Logic: NepMods