I build a sample object placing in space project using ARDK and its unity builds runs successfully.
But after integrated it with an android app the screen show the unity logo and remains in black screen. Don’t know why this happened but still the unity build working without any issues
I’m guessing you’ve already requested camera permissions within the android app (and verified in OS App settings that camera is allowed)? I don’t generally have a problem with the camera at initial application launch, but I do frequently see the feed go black after an app has lost and regained focus, so there might be something funky with ARDK’s feed re-acquisition flow that shows up in a more complex app but not in a single-purpose start-tracking-on-launch demo?
The black screen issue was a known issue with 1.3.1 and has been resolved with the release of ARDK 2.0.0. Please update to the latest version here: https://lightship.dev/account/downloads.