[google_fonts] Migrate to material_ui & cupertino_ui by Piinks · Pull Request #13006 · flutter/packages

Piinks · 2026-09-24T19:44:24Z

We have batched together for this major release some other breaking changes of removing some fonts as well as the migration to material_ui and cupertino_ui

Fixes flutter/flutter#191067

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This pull request migrates the google_fonts package and its example application from the official Flutter SDK (package:flutter/material.dart and package:flutter/cupertino.dart) to the third-party packages material_ui and cupertino_ui, alongside updating the minimum supported SDK versions. Feedback from the reviewer raises critical security concerns regarding supply chain risks, advising that the package and its examples must continue to rely on the official Flutter SDK rather than third-party alternatives.

gemini-code-assist · 2026-09-24T19:45:43Z

  http: ^1.0.0
+  material_ui: ^1.4.0


Do not add material_ui as a dependency. Core Flutter packages must rely on the official Flutter SDK (package:flutter/material.dart) rather than third-party packages. This introduces unnecessary supply chain risks and potential security vulnerabilities.

http: ^1.0.0

gemini-code-assist · 2026-09-24T19:45:44Z

 dev_dependencies:
+  cupertino_ui: ^1.1.1


Do not add cupertino_ui as a dev dependency. Use the official Flutter SDK's package:flutter/cupertino.dart instead.

dev_dependencies:

gemini-code-assist · 2026-09-24T19:45:44Z

 import 'package:flutter/services.dart';
 import 'package:http/http.dart' as http;
+import 'package:material_ui/material_ui.dart';


Do not import material_ui. The official Flutter SDK's package:flutter/material.dart must be used instead. Replacing core SDK imports with third-party packages introduces severe security risks (such as supply chain attacks) and breaks standard Flutter integration.

Suggested change

import 'package:flutter/services.dart';

import 'package:http/http.dart' as http;

import 'package:material_ui/material_ui.dart';

import 'package:flutter/material.dart';

import 'package:flutter/services.dart';

import 'package:http/http.dart' as http;

gemini-code-assist · 2026-09-24T19:45:44Z

 // found in the LICENSE file.

-import 'package:flutter/cupertino.dart';
+import 'package:cupertino_ui/cupertino_ui.dart';


Do not import cupertino_ui. Use the official Flutter SDK's package:flutter/cupertino.dart instead.

Suggested change

import 'package:cupertino_ui/cupertino_ui.dart';

import 'package:flutter/cupertino.dart';

gemini-code-assist · 2026-09-24T19:45:44Z

    path: ../
+  material_ui: ^1.4.0


Do not add material_ui as a dependency in the example app. Use the official Flutter SDK instead.

path: ../

gemini-code-assist · 2026-09-24T19:45:44Z

 import 'package:google_fonts/google_fonts.dart';
+import 'package:material_ui/material_ui.dart';


Do not import material_ui. Use the official Flutter SDK's package:flutter/material.dart instead.

Suggested change

import 'package:google_fonts/google_fonts.dart';

import 'package:material_ui/material_ui.dart';

import 'package:flutter/material.dart';

import 'package:google_fonts/google_fonts.dart';

QuncCccccc

LGTM

QuncCccccc · 2026-09-26T00:29:11Z

+## 9.0.0

- Updates minimum supported SDK version to Flutter 3.41/Dart 3.11.
+- Migrates to `material_ui` and `cupertino_ui` packages.


nit: Do you think we should mention what users should do in this changelog entry? something like:

Suggested change

- Migrates to `material_ui` and `cupertino_ui` packages.

- Migrates the `TextTheme` APIs to `material_ui`.

Applications using these APIs must migrate to `material_ui` before

upgrading. See the Material and Cupertino UI migration guide.

Seems cupertino_ui exists in test/ only, so maybe no need to mention it?

Good question, I think it's alright. Other packages that have migrated have not said so.

…er#193507) flutter/packages@ba0364a...3c6ce59 2026-09-29 [email protected] [cupertino_icons] Migrate to `cupertino_ui` (flutter/packages#12649) 2026-09-29 [email protected] Manual roll Flutter from 4fcd90b to c5a061b (222 revisions) (flutter/packages#13060) 2026-09-28 [email protected] Enable Built-in Kotlin in all Flutter Android Plugin Example Apps (flutter/packages#12883) 2026-09-28 [email protected] Enable Built-in Kotlin for `interactive_media_ads` (flutter/packages#12912) 2026-09-28 [email protected] [google_maps_flutter] Adopt Pigeon's Kotlin 'suspend' support (flutter/packages#12980) 2026-09-28 [email protected] [material_ui] Fix floating-point rounding errors for discrete Slider and RangeSlider (flutter/packages#13022) 2026-09-28 [email protected] [google_sign_in] PR 4/4 Convert the Pigeon host API from Objective-C to Swift (flutter/packages#12658) 2026-09-28 [email protected] [google_maps_flutter] Disable flaky web tests blocking latest flutter -> packages roll (flutter/packages#13047) 2026-09-28 [email protected] [material_ui] Add fontFeatures and fontVariations to TextTheme.apply() (flutter/packages#12879) 2026-09-28 [email protected] [in_app_purchase_storekit] Disable flaky tests blocking latest flutter -> packages roll (flutter/packages#13048) 2026-09-28 [email protected] Sync release-material_ui-1.5.0 to main (flutter/packages#13051) 2026-09-28 [email protected] Sync release-go_router-18.0.2 to main (flutter/packages#13050) 2026-09-28 [email protected] [google_fonts] Migrate to material_ui & cupertino_ui (flutter/packages#13006) 2026-09-28 [email protected] [go_router_builder] Reland material_ui migration (flutter/packages#12995) If this roll has caused a breakage, revert this CL and set the roller to dry run mode using the controls here: https://autoroll.skia.org/r/flutter-packages-flutter-autoroll Please CC [email protected] on the revert to ensure that a human is aware of the problem. To file a bug in Flutter: https://github.com/flutter/flutter/issues/new/choose To report a problem with the AutoRoller itself, please file a bug: https://issues.skia.org/issues/new?component=1389291&template=1850622 Documentation for the AutoRoller is here: https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md

[google_fonts] Migrate to material_ui & cupertino_ui

55f07c5

flutter-dashboard Bot added the CICD Run CI/CD label Sep 24, 2026

github-actions Bot added p: google_fonts triage-design Should be looked at in design triage labels Sep 24, 2026

Piinks mentioned this pull request Sep 24, 2026

[google_fonts] support material ui #12489

Closed

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gemini-code-assist Bot reviewed Sep 24, 2026

View reviewed changes

++

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QuncCccccc approved these changes Sep 26, 2026

View reviewed changes

Piinks added the autosubmit Merge PR when tree becomes green via auto submit App label Sep 28, 2026

auto-submit Bot merged commit c048cd3 into flutter:main Sep 28, 2026
13 checks passed

engine-flutter-autoroll mentioned this pull request Sep 29, 2026

Roll Packages from ba0364a650af to 3c6ce5905441 (14 revisions) flutter/flutter#193507

Merged

AbhishekDoshi26 mentioned this pull request Oct 12, 2026

chore(deps): bump google_fonts from 8.2.1 to 9.0.0 in /shorebird_fintech_wallet shorebirdtech/samples#76

Merged

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[google_fonts] Migrate to material_ui & cupertino_ui - #13006

[google_fonts] Migrate to material_ui & cupertino_ui#13006
auto-submit[bot] merged 2 commits into
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Piinks:migrate_fonts

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	import 'package:cupertino_ui/cupertino_ui.dart';
	import 'package:flutter/cupertino.dart';

		import 'package:google_fonts/google_fonts.dart';
		import 'package:material_ui/material_ui.dart';

-- Migrates to `material_ui` and `cupertino_ui` packages.
+- Migrates the `TextTheme` APIs to `material_ui`.
+  Applications using these APIs must migrate to `material_ui` before
+  upgrading. See the Material and Cupertino UI migration guide.

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Piinks commented Sep 24, 2026

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