fix(android): guard getLongVersionCode() for API < 28 to prevent launch crash#219
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…ch crash getAppVersion runs on every startup and called PackageInfo.getLongVersionCode() (API 28+) unconditionally. R8 outlines the call into a synthetic class it may merge with other API 28+ outlines (e.g. Flutter 3.41's ImageDecoder-based image decoder); invoking that class on API < 28 fails verification with NoClassDefFoundError (android.graphics.ImageDecoder$OnHeaderDecodedListener) and crashes the app on launch on Android 8.1 and below. Guard the call with Build.VERSION.SDK_INT and fall back to the deprecated versionCode int field on older devices.
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Update .fvmrc to use Flutter 3.44.4 (was 3.44.3). Ensures project uses the patched Flutter SDK version via FVM for consistency across environments.
FeodorFitsner
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Jun 29, 2026
Lockstep version bump across all packages (pubspecs, darwin podspec, android gradle) and CHANGELOG entries. Contains the two Android fixes since v4.1.0: * Guard getLongVersionCode() for API < 28 to prevent launch crash on Android 8.1 and below (#219). * Bundle every ABI's _sysconfigdata into the ABI-common stdlib.zip, fixing a non-primary-ABI startup ModuleNotFoundError (#218).
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Problem
Flet/serious_python apps crash on launch on Android 8.1 and below (API < 28), while working on Android 9+ (API 28+). Reported in flet-dev/flet#6619 as a regression that started in Flet 0.81.0.
Root cause
AndroidPlugin.getAppVersion— whichserious_pythoncalls on every app startup (to build the site-packages cache-invalidation key, before Python starts) — callsPackageInfo.getLongVersionCode(), which is API 28+, unconditionally.R8 (release builds) outlines API-28 calls into a synthetic class (
AndroidPlugin$$ExternalSyntheticApiModelOutline0) and horizontally merges into it the API-28 outlines from other code — notably Flutter 3.41's newio.flutter.embedding.engine.image.ImageDecoderDefaultImpl(which usesandroid.graphics.ImageDecoder). Invoking the version-code outline on API < 28 forces that merged class to load/verify, and its references toandroid.graphics.ImageDecoder$OnHeaderDecodedListener(API 28) fail to resolve:→ uncaught on the platform-channel handler → app crash.
This explains the exact regression boundary: Flet 0.80.5 shipped Flutter 3.38.7 (no
ImageDecoderDefaultImpl); Flet 0.81.0 bumped to Flutter 3.41.2, which added it. The unguardedgetLongVersionCode()was always present but only became fatal once Flutter contributed anImageDecoderoutline for R8 to merge with.Fix
Guard the call with
Build.VERSION.SDK_INTand fall back to the deprecatedversionCodeint field on API < 28. The API-26 path then never invokes the outlined method, so the merged synthetic class is never loaded on old devices (it's only loaded lazily on first invocation).Verification
Reproduced and verified on Android emulators with a stock
flet createcounter app (Flet 0.85.3 / Flutter 3.41.7, release APK):Deobfuscated the release
mapping.txtto confirm the merged outline class contained bothgetLongVersionCode(PackageInfo)and theImageDecodermethods.Fixes flet-dev/flet#6619.