Hi all, has anyone had trouble with `@Composable` ...

# compose

[Lauren Yew]

Hi all, has anyone had trouble with @Composable interface methods getting AbstractMethodError issues?
I have a simple interface that I'm using with Hilt to pass Compose Theme components back to a library.

import androidx.compose.material.Colors
import androidx.compose.runtime.Composable

interface DevSettingsMaterialTheme {
    @Composable
    fun devSettingsLightColors(): Colors?
...
}

class SampleDevSettingsMaterialTheme : DevSettingsMaterialTheme {
  
    @Composable
    override fun devSettingsLightColors(): Colors? = null // crashes w AbstractMethod
...
}

The library itself was able to implement the interface no problem, and I have tested with one app and it works fine, but another sample app where I'm using the same library (same gradle plugin version 7.1.0 + kotlin version 1.6.10, Java version 11, compose version 1.1.1), when I run the app and try to use the library feature, I get the error

java.lang.AbstractMethodError: abstract method "androidx.compose.material.Colors com...android.devsettings.di.DevSettingsMaterialTheme.devSettingsLightColors(androidx.compose.runtime.Composer, int)".
Any ideas on how I can work around this? Thanks!

[Lauren Yew]

Update: Realizing I might not have set up Compose in the project properly. Working on fixing. Will post back when I have results.

[Adam Powell]

The error definitely looks like the subclass was compiled without the compose plugin enabled. The compose plugin is what adds the Composer, int args