Quick Tap Service

This is an open-source implementation of the Pixel Quick Tap gesture, written from scratch for portability and customizability.

Quick Tap, codename Columbus, is a gesture powered by AP sensors and CHRE sensor on the Pixel 4a (5G) and later that is used to activate the Google Assistant on stock.

This app is a reverse-engineered Android client that runs as a standalone service and talks to the AP sensor and CHRE sensor for gesture functionality.

Features

• Seamless integration in Settings → System → Gestures → Quick Tap with no extra changes
• Integration with Settings search
• Many actions to perform on gesture trigger
  • Take screenshot
  • Open assistant
  • Play or pause media
  • See recent apps
  • Open camera
  • Toggle flashlight
  • Mute calls & notifications (replicates default power + volume-up "prevent ringing" gesture)
  • Toggle power menu
  • Toggle screen
  • Launch app
• Setting to control whether gesture is enabled when the screen is off
• Contextually-appropriate haptic feedback with modern effects
  • Heavy click for back tap
  • Reject for unavailable action (e.g. if flashlight can't turn on because camera is in use)

Integration

Sync this repo to packages/apps/ColumbusService.

Add the following to your device tree only for devices with this feature:

# Quick Tap
PRODUCT_PACKAGES += \
    ColumbusService

While 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
• For toggle recents action: core: Expose method to toggle recent apps through Binder

Default settings can be changed by overlaying res/values/config.xml.

Acknowledgements

• Active Edge Service by ProtonAOSP : Code base
• vendor_pixel-framework by PixelExperience : APSensor support for wider devices
• TapTap by Kieron Quinn : Port of the double tap on back of device feature from Android 12 to any Android 7.0+ device

License

All code in this repository is licensed under the GPL-3.0 License.