class QrCode : Trackable

Describes the current best knowledge of a real-world QR code

Summary

Nested types

The representation of the current state of a QrCode.

Public companion functions
StateFlow<Collection<QrCode>>
subscribe(session: Session)

Emits the QR codes that are currently being tracked in the session.

Public properties
open StateFlow<QrCode.State>

The current state of the QrCode

Public companion functions

subscribe

Added in 1.0.0-alpha15
fun subscribe(session: Session): StateFlow<Collection<QrCode>>

Emits the QR codes that are currently being tracked in the session.

Only instances of QrCode that are androidx.xr.arcore.TrackingState.TRACKING will be emitted in the Collection. Instances of the same QrCode will remain between subsequent emits to the StateFlow as long as they remain tracking.

Parameters
session: Session

the Session to subscribe to
Returns
StateFlow<Collection<QrCode>>

a StateFlow that emits a collection of QrCodes
Throws
IllegalStateException

if Config.qrCodeTracking is set to QrCodeTrackingMode.DISABLED

Public properties

state

open val state: StateFlow<QrCode.State>

The current state of the QrCode