Android cost reduction

Cost Reduction - Android

1. Reduce App assets
   • reduce thumbnail sizes [in progress]
   • reduce animation sizes [unknown]
   • reduce audio and video sizes [compressed] [hls in progress]
   • use svg for icons [unknown]
   • use webp for non-vector images [done]
   • for high-res assets, fallback to multiple APK support
2. Reduce code size
   • remove commented code from the codebase
   • ensure that the 3^rd party libraries are optimized for mobile use
   • use ProGuard to optimize image
   • enable resource shrinking at build time. Flags to set in build.gradle: minifyEnabled=true, shrinkResources=true
   • when using google services, selectively include only the necessary APIs
   • avoid dependency injection frameworks
3. Allow app to be moved to external storage (not needed for high-end devices with lots of in-build storage). use android::installLocation flag in AndroidManifest.xml
4. Reduce post-install app disk use
   • put cache in cache dir (getCacheDir()). this way, the system could delete files as needed
5. Configurable Network Use
   • allow user to choose network preference (data saving mode etc)
   • allow user to cache the video content that has a chance to be played in repeat