Bringing Predictive Back Gestures to your App

on YouTube ↗17m

" summary

Timeline of platform changes (onBackInvoked in Android 13, onBackAnimationCallback in 14, enabled by default in 15) maps to a concrete recipe: use the predictive back handler from androidx.activity + the Compose predictiveBackHandler flow, drive a manual seekable transition state (seekTo/animateTo) to reflect gesture progress, handle CancellationException to rewind, and upgrade to Navigation Compose 2.8.0-alpha02 for built-in support. Demo app shows gesture side, progress, X/Y positions, works for bottom sheets and shared-element effects but occasionally has visual bugs.

AI-written summary · about

" chapters (11)

1. 0:00Introduction
2. 1:06Android back gestures history
3. 3:15Predictive back API evolution
4. 4:38Jetpack navigation support
5. 5:41AndroidX activity API
6. 7:04Custom back host with predictive back
7. 9:15Integrating back handler
8. 11:05Demo: back handler features
9. 13:37Custom transitions with back
10. 14:42User feedback with back gestures
11. 15:03Summary

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