I have a Compose Multiplatform project generated u...

# compose

[John O'Reilly]

I have a Compose Multiplatform project generated using kmp.jetbrains.com. In the project I'm converting data in to a ImageBitmap using androidx.compose.ui.graphics.toComposeImageBitmap ....this works on all platform except for Android for some reason? Any known reason why that wold be the case? The same compose code/dependencies are used on all platforms.

[romainguy]

What data are you converting exactly?

[romainguy]

I don't recall toComposeImageBitmap being a core Compose API

[Alexander Zhirkevich]

Can you attach code snippet you use for conversion? If it contains org.jetbrains.skia classes, it would not compile for android

[romainguy]

Android has Bitmap.asComposeImageBitmap

[John O'Reilly]

ah, looks like there is skia dependencies

[John O'Reilly]

I'm using only Compose Multiplatform dependencies here btw

[Alexander Zhirkevich]

If so, you need to write expect function that uses Bitmap.asComposeImageBitmap on android and your code on other platforms

[John O'Reilly]

cool, thanks, I'l try that

[Alexander Zhirkevich]

You can take ImageViewer example as a reference

[John O'Reilly]

fwiw this is snippet of code I have (converting from base64 data)

val decodedBytes = Base64.Default.decode(imageData)
image = Image.makeFromEncoded(decodedBytes).toComposeImageBitmap()

...

Image(
    painter = BitmapPainter(image),
    ....
)

[John O'Reilly]

hmm, I'm using the Compose Multiplatform dependencies for Android as well so don't think I have access to Bitmap.asComposeImageBitmap

[John O'Reilly]

is there particular jetpack compose dependency I need to pull in for that?

[Alexander Zhirkevich]

Check the link above. It is exact what you need.

[John O'Reilly]

ah, thanks, I missed that

[Michael Paus]

I use this function implementation on desktop (and all Skia based platforms)

fun imageBitmapFromBytes(encodedImageData: ByteArray): ImageBitmap {
    return Image.makeFromEncoded(encodedImageData).toComposeImageBitmap()
}

and this on Android where we don’t have Skia access.

fun imageBitmapFromBytes(encodedImageData: ByteArray): ImageBitmap {
    return BitmapFactory.decodeByteArray(encodedImageData, 0, encodedImageData.size).asImageBitmap()
}

The ByteArray is assumed to contain the bytes of a PNG or JPEG image.