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Guide Dynamic Android Patcher

Guide Dynamic Android Patcher
Dynamic Android Patcher v3.6 - The Complete Guide

Dynamic Android Patcher v3.6

The Complete Guide for Termux Users

Welcome to the official guide for the Dynamic Android Patcher v3.6. This tool is designed for Termux users to patch, modify, and rebuild Android applications. The key innovation in this version is its **profile-based patching engine**, which moves away from unreliable hardcoded patches. This makes the tool highly adaptable, robust, and ready for future challenges.

Changelog

Version 3.6 (Profile Engine)

  • NEWIntroduced the Dynamic Patching Engine using external JSON profiles.
  • IMPROVEMENTFull command-line argument support (`--sign`, `--install`, `--profile`, etc.).
  • IMPROVEMENTAuto-download functionality for required JAR files.
  • IMPROVEMENTInteractive file selection for multiple APKs in a directory.

Prerequisites

Before you begin, ensure you have the following set up:

  • An Android device with Termux installed.
  • A working internet connection for the first run to download dependencies.
  • The patch.py script and your target application (e.g., your_app.xapk).
  • The required directory structure as shown below.

Recommended Folder Structure:

/storage/emulated/0/YourFolder/
├── patch.py
├── your_app.xapk
└── patches/
    └── default_pairip.json

The Patch Profile System: A Smarter Approach

Older patchers often fail because they rely on **hardcoded** file and method names. If an app update renames a file from SignatureCheck.smali to Verify.smali, a hardcoded patcher breaks.

The Dynamic Patcher solves this problem. It's **future-proof** because it finds patch locations based on the **content inside the code**, not fixed names. It reads instructions from .json profiles, which tell the script what text patterns to search for. Even if filenames change, the code patterns inside often stay the same, allowing the patcher to continue working reliably.

This modular approach means you can bypass new protections simply by **creating a new .json profile**, without ever needing to modify the main Python script.

How to Create a Custom Patch Profile

  1. Investigate Decompiled Code: Run the patcher on a new app. It may fail, but it will leave a folder at ~/apk_patch_work/decompiled. Temporarily disable the cleanup function in `patch.py` to inspect this folder.
  2. Search for Clues: Open the smali files in a text editor and search for keywords related to protection, such as license, isPremium, tamper, signature, root, or detect.
  3. Identify the Target: When you find a keyword, note the class name (e.g., Lcom/app/security/Check;) and the full method signature (e.g., isVerified()Z). The letter at the end of the signature is the return type (`Z` for boolean, `V` for void).
  4. Create New Profile: Create a new your_app_profile.json file in your patches folder. Use the information you found to define the search_patterns and target_method.
  5. Run with Profile: Execute the script with your new profile:
    python patch.py new_app.apk --profile your_app_profile.json

Commands & Usage Scenarios

Scenario 1: Basic Usage (Unsigned APK)

Patches the app using the default profile and leaves the resulting APK unsigned. Good for quick testing.

python patch.py your_app.xapk

Scenario 2: Signing with a Debug Key

The most common command. It patches the app and signs it with a universal debug key, making it installable.

python patch.py your_app.xapk --sign

Important Notes

  • File Paths: If your target APK is not in the same directory as the script, you must provide the full path to it.
  • Termux Permissions: Ensure Termux has storage access. If you encounter file-related errors, run the command termux-setup-storage and grant the permission.

Download File

If you need the specific versions of the File these instructions were tested with, you can download them below.

Guide for Dynamic Android Patcher v3.6. Happy patching!

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