Simple Android Video Player

An Android video and audio player built with Rust using android-activity, winit, and wgpu.

Overview

This project is a native Android application written in Rust that provides a video and audio player interface with support for:

Playing local video and audio files via Android's default system player
Modern Material Design 3 dark theme interface with custom 2D canvas rendering
Fast, persistent favorites list stored directly in app-private JSON storage
File management capabilities (add and delete favorites)
Automatic permission handling (takePersistableUriPermission) for robust file access across app restarts

android-activity: Event loop glue between native C activity and Rust android_main thread.
wgpu: Cross-platform WebGPU graphics rendering pipeline.
MainActivity.java: Java wrapper class extending NativeActivity that overrides onActivityResult for persistent file picking permissions and handles thread dispatching via runOnUiThread.
ui_renderer.rs & ui.rs: Pure Rust Material 2D rendering engine with custom text glyph drawing, chip badges, and layout positioning.
media_picker.rs: Safe JNI bindings to Java helper methods with complete error handling.
favourites.rs: Thread-safe JSON storage management for favorite media items.

Rust with aarch66-linux-android target installed (rustup target add aarch64-linux-android)
Android NDK (r26b or newer)
Android SDK with build-tools (34.0.0 or newer)
cargo-apk (cargo install cargo-apk)

To compile, package into APK, install on a connected Android device/emulator, and run:

./run.sh

To build the signed APK without installing:

./build_apk.sh

The output APK will be placed at target/debug/apk/android_video_player.apk.