I'm getting this error... why not support Android 21? ```Manifest merger failed : uses-sdk:minSdkVer...

# arrow

[dave08]

I'm getting this error... why not support Android 21?

Manifest merger failed : uses-sdk:minSdkVersion 21 cannot be smaller than version 24 declared in library [io.arrow-kt:arrow-fx-coroutines-android:2.1.0] /Users/.../.gradle/caches/8.11.1/transforms/045ef252391867439316ddf425145437/transformed/arrow-fx-coroutines-release/AndroidManifest.xml as the library might be using APIs not available in 21

[simon.vergauwen]

I'm guessing this is the culprit, not sure why we landed on minSdk = 24.

https://github.com/arrow-kt/arrow/blob/ff3db0f8ceae55c1475b20cda4a8a8f9cc854a2e/buildSrc/src/main/kotlin/arrow.kotlin.gradle.kts#L210

[simon.vergauwen]

Ktor defines minSdkVersion(9), and I cannot find any reference to minSdk in KotlinX Coroutines although it defines a Android module 🤔

[dave08]

Yup, that's what it looks like... will you remove that in the next version?

[simon.vergauwen]

Yes, we can do a patch release for that but we should figure out what is the ideal minSdk. Any suggestions with a reference would be great! I'm going to inquiry inside JB for advice in the meanwhile.

[Stylianos Gakis]

At a minimum I think you should aim to support at least what androidx supports, which is what most apps are using one way or another.
I think androidx is at either 21 or perhaps 23 which may have changed recently, I have a faint memory of reading about them making such a change.

[dave08]

Good point! Android Compose is at 21.

[Alejandro Serrano.Mena]

yes, let's try to figure out what the good version is; I remember I chose 24 because according to this list it covers the last 9 years, but we can change it to another version if that one brings problems

[dave08]

It would be really nice to put it back down to 21... we need to support those older devices that are out there to cover a specific use case and there's too many to just tell everybody "just buy a new device" in our case...

[simon.vergauwen]

and there's too many to just tell everybody "just buy a new device" in our case...

That's never really an option 😅 We'll do a 2.1.1 release with a lowered minSdk soon. Since we don't have any actual Android code I don't see any issues.

[Alejandro Serrano.Mena]

https://github.com/arrow-kt/arrow/pull/3613 -> PR with all the changes required to bring compatibility down to Android 21 (and also Java 😎

[Alejandro Serrano.Mena]

2.1.1 with support for Android 21 released!!

[dave08]

Thanks a lot 👍🏼!