USB Flasher for Android

✨ Features

• Rootless Operation: Works on non-rooted devices using the Android USB Host API.
• Raw Block Writing: Flashes images directly to the raw block device, bypassing partition table limits.
• Verification: Automatically verifies the written data against the source file (SHA-256) to ensure data integrity.
• Auto-Detection: Automatically detects and selects connected USB mass storage devices.
• Wake Lock: Keeps your screen on during long flash operations.
• Safety First: Does not support Windows ISOs or macOS DMG files to prevent frustration (these require complex bootloader workarounds). Explicitly designed for Linux Hybrid ISOs (Ubuntu, Fedora, Debian, Arch, etc.).

🚀 Getting Started

Prerequisites

• An Android Device with OTG (On-The-Go) support.
• Android 8.0 (Oreo) or higher (API Level 26+).
• A USB OTG adapter (USB-C to USB-A).

Installation

Download the latest APK from the Releases page.

🛠️ Building from Source

1. Clone the repository:

   git clone https://github.com/libre-tools/usb-flasher-android.git
   cd usb-flasher-android

2. Open in Android Studio:

   • Select "Open an existing Android Studio project".
   • Navigate to the cloned directory.

3. Build the APK:

   ./gradlew assembleDebug

   The APK will be located at app/build/outputs/apk/debug/app-debug.apk.

🤝 Contributing

We welcome contributions! Please see CONTRIBUTING.md for guidelines on how to get started.

🛡️ Security

If you discover a security vulnerability, please check SECURITY.md for our disclosure policy.

📜 License

This project is licensed under the Apache License 2.0 - see the LICENSE file for details.

Acknowledgments

• Built using libaums (modified for raw block access).
• Material Design 3 (Jetpack Compose).