Does anyone know the difference between `ViewGroup...

# compose

[fengdai]

Does anyone know the difference between ViewGroup.setContent (in Wrapper) and ViewGroup.setViewContent (in Compose)?

[Luca Nicoletti]

Well, they internally call a different implementation of Compose.composeInto one of them returns a nullable CompositionContext the other instead does not allows nullable

[fengdai]

Sorry, I meant the difference between the purpose of them.

[Andrey Kulikov]

setContent is adding our AndroidComposeView which allows using Compose UI composables as a content. setViewContent is not really should be used for now, but this allows using compose runtime with just Android plain Views, see the example: https://android.googlesource.com/platform/frameworks/support/+/androidx-master-dev/ui/ui-material/integration-tests/material-demos/src/main/java/androidx/ui/material/demos/RippleActivity.kt. Note that this mode is not fully tested and it is not yet decided afaik in what shape it will be supported in funute. We would probably use it for compatibility to allow using some Views inside Compose UI composables

[fengdai]

@Andrey Kulikov Thanks for your explanation. I tried setViewContent, but the code can not be complied:

class MainActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setViewContent {
            TextView(this)
        }
    }
}

[Andrey Kulikov]

as you can see in my example you don't need to pass context. so if you remove this and instead add something like text = "Test" it should compile

[fengdai]

It works! AS marks the construction statement as an error, but it can be compiled. Seams that something magical happened. Cool. 😝

[Andrey Kulikov]

yeah, that what I meant by "not really should be used"

[fengdai]

I see. Thanks again.