On some Android versions the path_provider Pigeon channel
('dev.flutter.pigeon.path_provider_android.PathProviderApi.getApplicationSupportPath')
is not ready when initDatabasePath() runs before runApp(). The existing code
already catches PlatformException there, leaving _dbPath null — but the
LazyDatabase callback called getApplicationSupportDirectory() a second time
without any protection, causing an unhandled crash on those devices.
Fix: extract _resolveDatabasePath() which retries three times with back-off
(100 ms → 300 ms → 600 ms) before re-throwing with a descriptive error
message. By the time the database is first accessed (after runApp()), the
channel is almost always available; if it still isn't, the CrashScreen is
shown with a clear explanation.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
