When targeting Android for a KMP project using Coil 3.0.0-alpha06, attempting to use `.toBitmap()` and `.asComposeImageBitmap()` results in `Unresolved reference` about coil HOT 6 CLOSED

Thanks for the repro. I believe this is a Compose Multiplatform/Skia error. Compose Multiplatform exposes org.jetbrains.skia.** classes and allows them to be referenced from common code, but the Skia dependency isn't available on Android and will fail to compile. You can trigger the same error by adding a reference to org.jetbrains.skia.Bitmap in common code.

To fix this you'll have to create an expect/actual function that uses the Skia Bitmap.asComposeImageBitmap on non-Android platforms and an implementation to convert android.graphics.Bitmap into an ImageBitmap on Android platforms (though I'm not sure about the specific method for that unfortunately).

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It's an issue with how Compose Multiplatform exposes its Skia dependency - not Coil. Coil only exposes the Skia dependency on non-Android platforms. It's not possible to fix from Coil's code. I'd recommend reporting the issue to the Compose Multiplatform team.

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The issue is asComposeImageBitmap shouldn't be exposed to common code at all by the Compose Multiplatform library since it's not present on Android. It's expected that it would be unresolved when compiling.

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It's very strange, because the project builds and compiles for the other platforms... I'm sure this is going to be a common issue for people using the library on Android.

Is this something that sounds worthwhile to fix for Android?

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I see that it's a Skia dependency issue, and you are still recommending that I create a custom solution for it or ask JetBrains to fix it?

Is this the final answer?

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I have submitted the issue at Compose Multiplatform team:

JetBrains/compose-multiplatform#4797

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