YouTube Video Downloader Android App

An Android application that allows users to download videos and audio from YouTube. Built with Java and the Android SDK.

Features

• Download YouTube videos in various qualities
• Extract audio from videos
• Support for both progressive and adaptive streams
• Real-time download progress tracking
• Video format conversion support
• Custom video quality selection
• Thumbnail preview
• Video metadata display (title, length, etc.)

Technical Details

The app is built using:

• JavaTube https://github.com/felipeucelli/JavaTube
• Java
• Android SDK (minimum SDK version 29)
• FFmpeg for media processing

Key components:

• Youtube.java - Core YouTube interaction logic
• Stream.java - Handles video/audio stream downloading
• Cipher.java - Manages YouTube signature decryption
• Request.java - Network request handling

Project Structure

The project follows standard Android application architecture:

app/
├── src/
│   ├── main/
│   │   ├── java/
│   │   │   └── com/example/projekat/
│   │   │       ├── javatube/           # Core YouTube functionality
│   │   │       ├── MainActivity.java    # Entry point
│   │   │       └── DownloadActivity.java # Download handling
│   │   └── res/                        # Android resources
└── build.gradle                        # Project configuration

Dependencies

This app uses the following key libraries:

• AndroidX & Material Design - For modern Android UI components and layouts
• FFmpeg - For processing and converting video/audio files
• Glide - For loading and displaying video thumbnails
• Rhino - For JavaScript processing

Permissions

The app requires the following permissions to function properly:

• Internet Access - To download videos from YouTube
• Storage Access - To save downloaded videos and audio files to your device

Note: When you first launch the app, you'll be asked to grant these permissions. The app cannot function without them.

Building

1. Clone the repository
2. Open the project in Android Studio
3. Sync Gradle files
4. Build and run on your device/emulator

Note

This application is for educational purposes only. Please respect YouTube's terms of service and content creators' rights when using this application.