Strengths and Weaknesses of Solutions for Handling Local Web Files on Native Android

Thibaut Lombard — July 2025

Method Strengths (S) Weaknesses (W) Opportunities (O) Threats (T)
Direct load via file:///android_asset/ Easy to implement
No server needed
Works on all Android versions
localStorage supported
IndexedDB partially supported
Fully offline compatible
WebGL support possible depending on WebView version
Same Origin Policy restrictions (SOP)
No network access
CORS blocked for AJAX/fetch
JS limited for local files
IndexedDB unstable on some devices
WebGPU not available
Simple static apps
Full offline mode
localStorage usable
WebGL sufficient for basic 3D rendering
Compatibility issues for advanced WebGL
Limitations on fetch/ajax
Cannot run WebGPU without native HTTP serving
NanoHTTPD (embedded local HTTP server) Real HTTP server (no SOP/CORS restrictions)
Full JS/JSON/CSS support
Dynamic reloading
Compatible with all Android versions
Fully functional localStorage & IndexedDB
WebGL and WebGPU possible if WebView supports it
Adds an extra dependency
APK size slightly larger
More complex setup
Uses CPU/memory
Server lifecycle management needed
Fast dev without rebuilds
Easy debugging
Supports heavy interactive 3D content (WebGL/WebGPU)
Dynamic loading of large resources
Bugs related to server handling
CPU/memory overhead
Security management
Possible WebGPU issues on outdated WebViews
WebViewAssetLoader (API 28+) Built into Android
Serves assets via simulated HTTP
No SOP/CORS issues
Full JS execution
Stable localStorage and IndexedDB
Lightweight
Native stable WebGL support
Partial WebGPU (recent WebView only)
Requires Android 9+ (API 28)
Not available on older Android
Limited to resources inside APK
WebGPU not guaranteed on older Chromium WebView
Less flexible than a full server
Modern and secure
Ideal for recent apps
Good support for modern Web APIs (WebGL)
Simple and secure deployment
WebGPU compatibility issues
Limited to in-APK files
Possible bugs with JSON files on old WebViews
Load via external HTTP server Full loading, no SOP/CORS issues
Very flexible
Simplifies development
Works remotely
Full localStorage and IndexedDB support
Best WebGL and WebGPU performance
Requires internet connection
Depends on network
More complex server setup
Data/security risks
CORS configuration needed server-side
Perfect for hybrid or heavy apps
Advanced interactive content
High-performance 3D rendering
Easy hot updates
Network outages stop the app
Variable latency
Potential privacy leaks if unsecured
Server dependency

Thibaut Lombard