How do I troubleshoot why Preview annotation isn't...

# compose

[James Black]

How do I troubleshoot why Preview annotation isn't working in my project?
It does work on very simple UIs, where I show a text box, for example, that is hard-coded.
I am using Kotlin 1.6.10 on compose 1.2.0-alpha07

[Chris Sinco [G]]

If you click that blue Info icon in the top right of the Preview window that opens a panel where the error message shows up.

[Chris Sinco [G]]

What version of Android Studio are you using?

[James Black]

Bumblebee is the version.

java.lang.IllegalStateException: KoinApplication has not been started
at org.koin.core.context.GlobalContext.get(GlobalContext.kt:36)
at com.blackfox.myoutfitpicker.android.ui.AnonymousSendScreenKt.AnonymousSendScreen(AnonymousSendScreen.kt:93)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

[james]

it’s because you’re attempting to use your DI injector on the preview

instead of having val viewModel: MyOutfitPickerViewModel by inject() inside the composable function body, I would provide it as a parameter, and then you can use a PreviewParameterProvider to pass in a mock/fake viewModel

[Chris Sinco [G]]

Ah yes. Preview doesn't support DI yet. Though I think we should make that clearer with error messaging