fix(android): keep system back working on Android 16 (targetSdk 36)#153
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On Android 16 / targetSdk 36, android:enableOnBackInvokedCallback defaults to true, so the OS routes the back gesture and the 3-button back through OnBackInvokedDispatcher instead of dispatching KEYCODE_BACK. Qt does not register an OnBackInvokedCallback, so the platform's default callback finishes the activity and the app closes from any sub-screen, instead of navigating back via MobileApplication.qml's Keys.onBackPressed -> backAction(). Opt out of the predictive back callback to restore legacy KEYCODE_BACK delivery. Verified on a Pixel 8a (Android 16): edge-swipe and 3-button back now return to the previous screen; double-back-to-exit on the main screen still works. Fixes #152 Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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Description:
On Android 16 / targetSdk 36, android:enableOnBackInvokedCallback defaults to true, so the OS routes the back gesture and the 3-button back through OnBackInvokedDispatcher instead of dispatching KEYCODE_BACK. Qt does not register an OnBackInvokedCallback, so the platform's default callback finishes the activity and the app closes from any sub-screen, instead of navigating back via MobileApplication.qml's Keys.onBackPressed -> backAction().
Opt out of the predictive back callback to restore legacy KEYCODE_BACK delivery. Verified on a Pixel 8a (Android 16): edge-swipe and 3-button back now return to the previous screen; double-back-to-exit on the main screen still works.
Fixes #152
Checklist: