Jean-Luc Makiola
6a2f490b1a
Glance identifies a widget by its GlanceAppWidget subclass's canonical name: GlanceAppWidgetManager stores a providerName -> receivers map under that string, and updateAll resolves a widget's app-widget ids through it. R8 full mode horizontally merged MonthWidget into AgendaWidget — same supertype, same overrides, nothing to tell them apart — so both receivers registered under one provider name and AgendaWidget().updateAll() also matched the month widget's id, redrawing it as the agenda widget on the next PROVIDER_CHANGED. 2.16.0 is where it started because that release gave AgendaWidget the SizeMode.Exact override MonthWidget already had, which is what made the two classes mergeable. Verified in the releaseTest mapping: before, only AgendaWidget survived, carrying an $r8$classId field and MonthWidget's constructor frames; after, both classes are there under their own names. Keeping the real names also survives app updates, which would otherwise renumber the obfuscated name and orphan the stored mapping.
53 lines
3.2 KiB
Prolog
53 lines
3.2 KiB
Prolog
# Keep Hilt-generated classes
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-keep class dagger.hilt.** { *; }
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-keep @dagger.hilt.android.HiltAndroidApp class *
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# Compose Compiler may keep its own; defaults are fine
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-dontwarn org.jetbrains.annotations.**
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# Room database implementations (pulled in transitively via
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# androidx.glance:glance-appwidget → androidx.work → androidx.room).
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# The widgets rely on Glance, whose WorkManager backend stores state in a Room
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# database. Under R8 full mode (AGP 9 default) the generated *_Impl subclasses
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# of RoomDatabase lose their usable no-arg constructor / are marked abstract,
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# so Room's reflective instantiation throws InstantiationException and the app
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# crashes at startup with "Failed to create an instance of ...WorkDatabase".
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# Keep the generated Room database implementations fully intact.
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-keep class * extends androidx.room.RoomDatabase { *; }
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-dontwarn androidx.room.paging.**
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# Glance runs an @Composable's `actionRunCallback<T>()` by persisting the
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# callback's fully-qualified class name into the click PendingIntent, then
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# reflectively instantiating it (Class.forName(name).newInstance()) when the tap
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# fires. Under R8 full mode (AGP 9 default) these ActionCallback classes — only
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# ever referenced reflectively — get renamed or have their no-arg constructor
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# stripped, so the lookup fails silently and the tap does nothing. In the month
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# and agenda widgets that broke every run-callback control (the prev/next/today
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# month arrows and the agenda refresh) in release builds while actionStartActivity
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# taps, which ride a PendingIntent and need no reflection, kept working. Keep
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# every ActionCallback's name and constructor intact.
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-keep class * implements androidx.glance.appwidget.action.ActionCallback { <init>(...); }
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# WorkManager instantiates an InputMerger reflectively (Class.newInstance) from
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# the fully-qualified class name persisted in the WorkSpec, so the class must
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# keep both its name and a no-arg constructor. Glance renders every widget
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# through a WorkManager worker (androidx.glance.session.SessionWorker) whose
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# default merger is androidx.work.OverwritingInputMerger. Under R8 full mode
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# (AGP 9 default) that unused no-arg constructor was stripped, so WorkManager
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# threw "OverwritingInputMerger has no zero argument constructor", the
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# SessionWorker never ran, and widgets were stuck on their loading layout
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# (a blank spinner) in release builds. Keep every InputMerger's name + ctor.
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-keep class * extends androidx.work.InputMerger { <init>(...); }
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# Glance identifies a widget by its GlanceAppWidget subclass's *canonical name*:
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# GlanceAppWidgetManager persists a providerName -> receivers map under that
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# string, and `updateAll` looks the widget's app-widget ids up through it. Under
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# R8 full mode (AGP 9 default) MonthWidget and AgendaWidget — same supertype,
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# same overrides, no distinguishing members — were horizontally merged into one
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# class, so both receivers registered under the *same* provider name and
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# `AgendaWidget().updateAll()` resolved the month widget's id too, redrawing a
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# placed month widget as the agenda one on the next data change (#89). Keeping
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# the real names also survives app updates, which would otherwise renumber the
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# obfuscated name and orphan the stored mapping.
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-keep class * extends androidx.glance.appwidget.GlanceAppWidget
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