Optimize / Reduce final Demo APK File size

[cpholguera]

The Android Demo APKs are currently 8.29 MB, which is too large for such a simple app. Reducing the APK size is important to ease storage and improve user experience. We should investigate possible optimizations, such as removing unnecessary resources and optimizing images.

Note that using ProGuard may not be suitable because these are educational demos intended for practicing reverse engineering.

[shwetd19]

Hey @cpholguera I am thinking of this approach

Potential fix for this issue : To reduce the 8.29 MB APK size, we could:

1. Audit and remove unused resources (e.g., drawables, layouts) with Android Studio's "Remove Unused Resources" tool.
2. Optimize images by compressing PNGs/JPEGs with tools like TinyPNG or converting to WebP format.
3. Enable minification and resource shrinking in build.gradle (minifyEnabled true, shrinkResources true) to strip unused code and resources.

This should slim down the APK significantly while keeping functionality intact.

[cpholguera]

Thanks for the suggestions @shwetd19, @javier-ruiz-b is currently looking into this. Let's see which approach actually works. We don't really have any resources apart from the ones that are by default there / added by Android Studio.

[javier-ruiz-b]

Hello @shwetd19, steps 1 and 2 sound pretty good. As for the 3rd, @cpholguera has already commented that ProGuard / minification does not make much sense. It would also increase build times significantly.

[shwetd19]

Got it @javier-ruiz-b , if you say so I can raise the PR for this, but it'll contain lots of changes as per I think..

[cpholguera]

Thanks @shwetd19, however this was already assigned to @javier-ruiz-b who's currently working on it. Thanks for offering anyway!