This source-only P1 slice lets an Android 14/API 34+ device publish a 720p30 screen track to at most two Web Viewers assigned as direct children by the existing screener-v2 controller.

Build

Install JDK 17 and Android SDK 35, then run:

./gradlew :protocol:test :app:assembleDebug

The debug APK is written under app/build/outputs/apk/debug/. CI runs the same protocol tests and debug compile. No release signing or package publication is configured.

Use

Open the app, enter the HTTPS Screener base URL and site-access password, then choose a screen or app from Android's system picker. The app keeps credentials and room material in memory only. The displayed private invite can be opened by an unchanged Web Viewer.

The foreground notification and system capture indicator remain visible for the whole session. Stopping from the app or system picker closes capture, signaling, and every PeerConnection.

First-Slice Boundary

Video only: no playback-capture audio or A/V synchronization yet.
Hardware VP8/H.264 encoders only; there is no software encoder fallback.
At most two STUN-only direct-child edges. The server remains the route owner.
SFU publication and selected-edge TURN are not implemented. The client reports their attempts as bounded route failures instead of claiming support.
Rotation resize, background rebuild, Wi-Fi/cellular reselection, iOS, release signing, and device/performance matrices remain later work.