PDF Manager

A high-performance, privacy-focused PDF management and viewing application for Android.

Features

• PDF Rendering - High-quality PDF rendering powered by PDFium
• Virtual Folders - Organize PDFs without moving files
• Duplicate Finder - Detect and manage duplicate PDFs
• Text Search - Find text within PDF documents
• Table of Contents - Navigate using bookmarks
• Text Selection - Select and copy text
• Reflow Mode - Readable text display
• Password Protection - Open encrypted PDFs
• Theming - Light, Dark, and System themes

Screenshots

Requirements

• Android 13 (API 33) or higher
• arm64-v8a architecture

Building

Prerequisites

• JDK 21
• Android Studio (latest stable)
• NDK 29.0.14206865
• Rust (for PDF scanner module)

Clone

git clone https://github.com/HyntixHQ/PDFManager.git
cd PDFManager

Dependencies

By default, this project uses JitPack to pull the specialized libraries it depends on:

• HyntixPdfViewer: com.github.HyntixHQ:HyntixPdfViewer:1.0.3
• KotlinPdfium: com.github.HyntixHQ:KotlinPdfium:1.0.3

Local Development

If you wish to modify the libraries alongside the app:

1. Clone HyntixPdfViewer and KotlinPdfium to your system.
2. Open settings.gradle.kts and uncomment the include and projectDir lines.
3. Open app/build.gradle.kts and swap the JitPack dependency for the local project reference.

Build

# Debug build
./gradlew assembleDebug

# Release build
./gradlew assembleRelease

Tech Stack

Category	Technology
Language	Kotlin 2.3
UI	Jetpack Compose
Navigation	Navigation3
Database	Room
Preferences	DataStore
PDF Engine	PDFium
Native	C++ (SIMD bitmap ops)
Build	Gradle (Kotlin DSL)

Project Structure

PDFManager/
├── app/
│   └── src/main/
│       ├── java/.../pdfmanager/
│       │   ├── MainActivity.kt
│       │   ├── data/
│       │   │   ├── db/          # Room database & DAOs
│       │   │   ├── model/       # Data models
│       │   │   ├── repository/  # Repositories
│       │   │   └── scanner/     # PDF file scanner
│       │   ├── native/          # Native scanner & bitmap ops
│       │   ├── preload/         # PDF preloading
│       │   └── ui/
│       │       ├── home/        # Home screen & folders
│       │       ├── viewer/      # PDF viewer & reflow
│       │       ├── duplicates/  # Duplicate finder
│       │       ├── settings/    # Settings & legal
│       │       ├── permission/  # Storage permission
│       │       ├── components/  # Shared UI
│       │       ├── navigation/  # App routes
│       │       └── theme/       # Theming
│       ├── cpp/                 # Native C++ code
│       ├── jniLibs/             # Prebuilt native libs
│       └── res/                 # Resources
├── rust/
│   └── pdf_scanner/             # Rust PDF scanner
└── gradle/

Contributing

Contributions are welcome! Please read our Contributing Guide before submitting a PR.

1. Fork the repository
2. Create your feature branch (git checkout -b feature/amazing-feature)
3. Commit your changes (git commit -m 'Add amazing feature')
4. Push to the branch (git push origin feature/amazing-feature)
5. Open a Pull Request

License

This project is licensed under the GNU Affero General Public License v3.0 - see the LICENSE file for details.

Acknowledgments

• PDFium - PDF rendering engine
• Phosphor Icons - Icon library
• Jetpack Compose - Modern UI toolkit