In my android app a have a screen with a huge scroll. It has everything: embedded html, images, text...

# compose

[Brais Gabin]

In my android app a have a screen with a huge scroll. It has everything: embedded html, images, texts, a custom composable that renders QRs... I want to add a button to create a screenshot of that screen. I found different solutions but I don't like them too much.

Compose is a declarative way to render a screen. I should be able to create something like this val bitmap = screenshot { content() }. screenshot is not a @Composable function. It is just a regular function that returns a Flow<Bitmap> or just a suspend function that returns a single Bitmap. What I'm looking for is something similar to what paparazzi does but inside android, pass a composable to a function and it generates an screenshot of it. Is this possible? Is it done already? How hard could it be to develop?

[apolyakov]

Hi! Maybe this documentation can help - https://developer.android.com/develop/ui/compose/graphics/draw/modifiers#composable-to-bitmap ?

[Sergey Y.]

People have used a similar approach in this case. It may not be the most efficient solution, but it gets the job done. (Android only)
https://kotlinlang.slack.com/archives/CJLTWPH7S/p1715715563708939?thread_ts=1715677194.944999&cid=CJLTWPH7S

[Brais Gabin]

VirtualDisplay, that sounds promising! I will check that thread 🙂

[Brais Gabin]

Andrey that solutions works for me with simple composables but with webviews, LazyColumns and similar things it doesn't work that good :(

[Brais Gabin]

🤦‍♂️ headless! That was the missing keyword in my google search.

[Alex Styl]

Might be worth having a look at ImageComposeScene. I think it's desktop only but it sounds like what you want

[Skaldebane]

@Alex Styl ImageComposeScene is on all targets except Android (part of skikoMain).
Wondering what would it take to get implemented on Android, it's a super convenient headless API.