Full Android App Development Roadmap

This roadmap combines learning Termux/Linux basics, Python/C++ scripting, and system-level app development on Android.

Stage 1: Termux & Android OS Basics

Understand Android file system and sandboxing
Use Termux commands: ls, cd, pwd, cat
Create aliases and scripts in .bashrc
Learn storage permissions (termux-setup-storage)

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Stage 2: Programming Fundamentals

Learn a programming language: Python or C++
Practice loops, variables, functions, and file handling
Write small scripts and utilities

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Stage 3: User-space Apps

Create games (ping pong, puzzles) or tools (calculators, file managers)
Python + Kivy or Termux scripts can be used for GUI apps
Apps run in user-space sandbox; cannot override system functions
Access storage, network, and sensors with permissions

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Stage 4: System-level Apps

Apps that interact with core Android services (calls, SMS, firewall)
Requires Java/Kotlin with Android SDK, possibly root access
Examples: call blockers, custom dialers, system tweaks
Cannot be done with Python/Termux alone

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Stage 5: Continuous Learning & Deployment

Explore advanced features: sensors, networking, databases
Improve app UX, optimize performance and security
Package scripts or apps into APKs for installation
Publish apps or use for personal automation

Key Takeaways:

Start with Termux → understand OS and basic commands
Learn programming → Python/C++ for scripts and small apps
Create user-space apps → safe and portable, ideal for learning
System apps require Android SDK, special permissions, or root
Each stage builds the foundation for the next