I have no experience with android apps and just started working on one that needs to work with relational data. The relational data has multiple many-to-many relationships and the inbuilt ORM (Room) is leads to class explosion.

While looking at ORM libraries for android, there seem to be many that are out of date:

From 5 of the Best Android ORMs (2014) and AlexeyZatsepin/Android-ORM-benchmark (2017)

• ORMLite: 3 years old and the M2M example makes me feel quite queasy
• SugarORM: description explicitly only mentions 1:1, 1:n
• GreenDAO is unmaintained but replaced by ObjectBox which I haven't yet looked at
• Active Android: abandoned
• Realm redirects to MongoDB 💀
• Freezer: abandoned
• DBFlow: no documentation and 3 seemingly abandoned
• Requery: 4 years old (abandoned?). Actually my favorite in terms of API
• Sprinkles: 10 years old, dead

I'm leaning towards Requery because I like its API the most (hides SQL the most), but haven't looked at ObjectBox yet.

I'm new to using reactive and functional programming in kotlin with libraries. I'm maintaining a project at my company that uses only .orNull() from the arrow.core.Option class.

My question is: why is the project returning the first type instead of the second one?

Single<Option<UserEntity>>

Single<UserEntity?>

Can't the DAO object return a null type if it doesn't find the object on a query such as SELECT * FROM users WHERE id = 1 ?

cross-posted from: https://lemmy.pe1uca.dev/post/1512941

I'm trying to configure some NFC tags to automatically open an app, which is easy, just have to type the package name.
But I'm wondering how I can launch the app in a specific activity.

Specifically when I search for FitoTrack in my phone I get the option to launch the app directly into the workout I want to track, so I don't have to launch the app, click the FAB, click "Record workout" and then select the workout.
So I want to have a tag which will automatically launch this app into a specific workout.

How can I know what's the data I need to put into the tag to do this?

Probably looking at the code will give me the answer, but this won't apply to closed source apps, so is there a way to get all the ways all my installed apps can be launched?