Imported the project here: https://www.mediawiki.org/wiki/Google_Summer_of_Code/2018#[Wikimedia_Commons_app]_Allow_users_to_browse_Commons_from_app. Feel free to update the wiki.

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I think we can try to expand the scope of the project a bit and allow users who aren't logged in to browse Commons and upload images as well. It won't require a very drastic refactoring of the application, since MediaWiki and the APIs support anonymous edits (in a manner of speaking, it attributes it to the IP address of the user, instead).
However, the ContributionsActivity would have to go (for a user who isn't logged in, that is) , since the IP of a mobile user will keep changing.
GitHub issue #1221 talks about this too, though the implementation for the fix described there is quite different.

Just to clarify can anyone help me what does this statement mean:
"In the same results list, also show categories" 7th point in project schedule.
Does it mean showing all the categories with the obtained result in featured images after searching.
Please correct me if I'm wrong. Thanks:)

@Diddypod I don't think anonymous users can upload pictures?

@Jatin0312 Try searching for "ankake udon" on Commons: You get a mix of files and categories https://commons.wikimedia.org/w/index.php?title=Special:Search&search=ankake+udon&fulltext=Search

@Nicolas_Raoul you're correct. Users who aren't logged in can edit pages, but not upload images. I'm sorry for the mistake.

ping @Nicolas_Raoul @Nes @Ujjwalagrawal17 Is there anything remaining in this task from GSoC'18? If not, then please consider marking it as resolved! Ensure no pull requests are remaining to be merged and deployed in production and documentation both on-wiki and in the code is complete. If yes, then you could move the leftovers to a new task.