Fix: The class 'GoogleSignIn' doesn't have an unnamed constructor
google_sign_in 7.0.0 made GoogleSignIn a singleton. Replace GoogleSignIn(scopes: ...) with GoogleSignIn.instance, await initialize() once, then call authenticate().
Tag: flutter
103 posts · Page 2 of 11
Fix: Unable to find a destination matching the provided destination specifier in a Flutter iOS build
iOS 26 simulator runtimes are arm64-only, so a leftover EXCLUDED_ARCHS arm64 line builds an Intel-only Runner no simulator can execute. Drop the exclusion.
Flutter 3.47 Makes Impeller the Default Renderer on Windows, Linux, and macOS
Flutter 3.47.0 stable flips desktop apps from Skia to Impeller without touching a line of your runner code. Here is what moves, how to opt out on each platform, and why that opt-out is temporary.
Riverpod Notifier vs AsyncNotifier vs StreamNotifier in Flutter: which one do I extend?
Pick by the return type of build(): T means Notifier, FutureOr<T> means AsyncNotifier, Stream<T> means StreamNotifier. Here is the decision matrix, the type hierarchy that explains why, and the == filtering and state-clobbering gotchas that bite each one. Verified against flutter_riverpod 3.4.2 on Flutter 3.44.2.
Fix: An error occurred while preparing SDK package NDK (Side by side): Not in GZIP format
The SDK Manager is re-unpacking a corrupt archive it cached in .downloadIntermediates. Delete that folder and the half-extracted ndk/<version> directory, then re-run the build.
Fix: Google Play rejects a Flutter or .NET MAUI app for missing 16 KB memory page size support
Play rejects the bundle because a 64-bit .so still has 4 KB ELF segments. Find the offending library, rebuild it with NDK r28+, and verify with zipalign -P 16.
Fix: mprotect failed: 13 (Permission denied) in a Flutter iOS debug build
iOS blocks the Dart VM from flipping memory pages to executable, so JIT dies at startup. Upgrade to Flutter 3.35.0 or later for iOS 26, 3.32.0 for iOS 18.4. There is no entitlement that fixes it.
How to replace Flutter's deprecated Radio groupValue and onChanged with RadioGroup
Radio.groupValue and Radio.onChanged were deprecated after Flutter 3.32 and RadioGroup shipped in 3.35. A step-by-step migration for Radio, RadioListTile and CupertinoRadio, why dart fix cannot do it for you, and the generic type-inference trap that silently renders a migrated radio disabled. Verified on Flutter 3.44.2 stable.
Fix: flutter doctor reports cmdline-tools component is missing
Install the Android SDK Command-line Tools so the binaries land in <sdk>/cmdline-tools/latest/bin, point ANDROID_HOME at the SDK root, then re-run flutter doctor.
Fix: No Material widget found in Flutter
Wrap the subtree in Material(type: MaterialType.transparency) or put the screen in a Scaffold. MaterialApp alone does not provide a Material ancestor, which is why TextField and InkWell assert.