Home-screen widgets were stuck on the Glance loading layout (a blank spinner)
in the minified release build — but worked in debug. Root cause: Glance renders
every widget through a WorkManager worker (androidx.glance.session.SessionWorker),
and WorkManager instantiates the InputMerger reflectively from the fully-qualified
class name persisted in the WorkSpec (Class.newInstance, no-arg ctor). Under R8
full mode (AGP 9 default) the unused no-arg constructor of
androidx.work.OverwritingInputMerger was stripped, so WorkManager threw
"OverwritingInputMerger has no zero argument constructor", the SessionWorker
never ran, and provideContent never executed — leaving the widget on its
initial loading layout forever.
Same R8-reflection family as the v2.7.0 Room keep-rule fix. Keep the name +
constructor of every androidx.work.InputMerger.
Verified on-device with the releaseTest build (R8-minified): the agenda widget,
which showed only a spinner before, now renders its content; the WM-InputMerger
InstantiationException is gone. Closes #18. Cuts v2.7.3.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
The minified release build crashed on every launch before any UI:
Unable to get provider androidx.startup.InitializationProvider:
Failed to create an instance of androidx.work.impl.WorkDatabase
The home-screen widgets use Glance, which pulls in WorkManager and its
transitive Room database (room-runtime 2.2.5). Room 2.2.5's bundled keep
rule is `-keep class * extends androidx.room.RoomDatabase` — it keeps the
class but not its constructor. Under R8 full mode (AGP 9) the generated
WorkDatabase_Impl was reduced to a non-instantiable class, so Room's
reflective newInstance() threw InstantiationException at startup.
Add `-keep class * extends androidx.room.RoomDatabase { *; }` so the
generated *_Impl classes keep their constructors. Verified against the
rebuilt release APK: WorkDatabase_Impl is now PUBLIC FINAL with its
<init> present.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
- Restore 4-space indent on kotlin-compose plugin alias (regression from
the previous cleanup commit)
- Fix invalid ProGuard rule: HiltAndroidApp is an annotation type, not
a class - use '-keep @dagger.hilt.android.HiltAndroidApp class *' to
actually retain the @HiltAndroidApp-annotated Application
- Remove vectorDrawables.useSupportLibrary - dead config since minSdk 29
(native VectorDrawable support since API 21)
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
