I’m trying to wrap my head around this. I have an ...

# compose

[chris]

I’m trying to wrap my head around this. I have an observable come back with the data to make a Profile page, however I have to make a second call to display more data to the user afterwards. How could I react when the second set of data comes back and add that to the tree?
Example:

@Composable
Profile( username: String, name: String, location: String, activityTotals: List<ActivityTotals>? = null )

The activityTotals come back afterwards. Since Profile isn’t an object I can’t expose a property to update with the new value. Would I expose a state or pass in an observable or do something else?

[Adam Powell]

Can you show the code that calls this so far?

[chris]

viewModel.detailedAthlete.observe(viewLifecycleOwner, Observer { athlete ->
    profilezone.setContent{      Profile(athlete.username, athlete.name, athlete.location))
}

[chris]

Hadn’t gotten there yet, was trying to figure it out because I’m mixing compose in with a fragment that has other views. But I’m thinking it would be something like that.

[chris]

There would be a second observable for the other call on the viewModel

[Adam Powell]

Compose works a bit differently from that, a composable function doesn't return a View and may only be called by another composable function. Analogous code from a @Composable caller might look something like this:

val athlete by viewModel.detailedAthlete.observeAsState()

Profile(athlete.username, athlete.name, athlete.location)

[Adam Powell]

Compose will re-evaluate the function body when the input data changes, in this case when the state being observed changes.

[chris]

I could add the Composable to a fragment with ViewGroup.setViewContent right?

edit: I see it’s going away. Never mind.

[Adam Powell]

You probably want the ViewGroup.setContent extension rather than setViewContent for now, but yes. You'll want to call that extension on a FrameLayout or similar since ViewGroup.setContent doesn't give you much control over the child LayoutParams or ordering

[chris]

Thanks for the responses.

[Adam Powell]

The model is quite different at first but it starts paying off quickly 🙂