This is an open-source implementation of the Pixel Active Edge gesture, written from scratch for portability and customizability.
Active Edge, codename Elmyra, is a gesture powered by side grip sensors on the Pixel 2/XL, 3/XL, 3a/XL, and 4/XL that is used to activate the Google Assistant on stock. The gesture is handled by a proprietary nanoapp running under CHRE (ContextHub Runtime Environment) on the sensor DSP.
This app is a reverse-engineered Android client that runs as a standalone service and talks to the CHRE nanoapp for gesture functionality. No decompiled code has been used.
- Seamless integration in Settings → System → Gestures → Active Edge with no extra changes
- Integration with Settings search
- Many actions to perform on gesture trigger
- Take screenshot
- Open assistant
- Open camera
- Toggle flashlight
- Mute calls & notifications (replicates default power + volume-up "prevent ringing" gesture)
- Toggle power menu
- Toggle screen
- 10 sensitivity levels (more granular than stock)
- Setting to control whether gesture is enabled when the screen is off
- Contextually-appropriate haptic feedback with modern effects
- Heavy click for squeeze
- Click for release
- Reject for unavailable action (e.g. if flashlight can't turn on because camera is in use)
Sync this repo to packages/apps/ElmyraService.
Add the following to your device tree only for devices with this feature:
# Active Edge
PRODUCT_PACKAGES += \
ElmyraServiceWhile this service is designed to be as portable and self-contained as possible, Android does not provide the necessary APIs to implement all gesture actions out-of-the-box. This means that some commits must be added to frameworks/base to expose the APIs for full functionality:
- For screenshot action: SystemUI: Allow privileged system apps to access screenshot service
- For assistant action: core: Expose method to start assistant through Binder
Default settings can be changed by overlaying res/values/config.xml.
All code in this repository is licensed under the Apache 2.0 License.