Android: Photo Capture

Overview

Register the image stream callback on CXRLink, call takePhoto(width, height, quality) to trigger capture on the glasses, and receive JPEG bytes via IImageStreamCbk.onImageReceived.

Prerequisites

• Global CXRLink connected (same as Audio chapter).
• Scene building completed.
• GlassPermission.CAMERA recommended.

Core APIs

Method	Description
setCXRImageCbk(IImageStreamCbk)	Register image callbacks
takePhoto(width: Int, height: Int, quality: Int)	Trigger capture; quality is JPEG 0–100

IImageStreamCbk callbacks

Callback	Description
onImageReceived(data: ByteArray?)	JPEG bytes; decode with BitmapFactory
onImageError(code, msg?)	Capture failed

Example

link.takePhoto(1024, 768, 80)

Constraints

• Wait for callback before the next capture to avoid concurrency issues.
• Do not call when link is down.
• Clear Image callback on sub-page destroy; do not disconnect().

Appendix: reference sample

RenewCXRLSample PhotoUsageViewModel.