I have a `ByteArray` that contains the binary data of an image (image/png), and I need to show it. C...

# multiplatform

[Vram Voskanyan]

I have a ByteArray that contains the binary data of an image (image/png), and I need to show it. Can I somehow convert it into a Bitmap? Like In Android, it was done by BitmapFactory.decodeByteArray...

[Lucca Beurmann]

Yes, you can do this using an expect/actual implementation

[Max]

I did it without expect/actual actually.

@Vram Voskanyan check my comment here: https://kotlinlang.slack.com/archives/C0346LWVBJ4/p1713089530627749?thread_ts=1711662097.909009&channel=C0346LWVBJ4&message_ts=1713089530.627749
If it’s not enough information i can send you more code, got it to work last week.

[Michael Paus]

In common code:

expect fun ByteArray.decodeToImageBitmap(): ImageBitmap?

On Android:

actual fun ByteArray.decodeToImageBitmap(): ImageBitmap? {
    return BitmapFactory.decodeByteArray(this, 0, this.size).asImageBitmap()
}

On Desktop:

actual fun ByteArray.decodeToImageBitmap(): ImageBitmap? {
    return Image.makeFromEncoded(this).toComposeImageBitmap()
}

On iOS:
Same as for desktop.

[Vram Voskanyan]

Thanks, it works as expected. 🙌