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Summary

#

AppBarTheme, BottomAppBarTheme and InputDecorationTheme were refactored to conform to Flutter's conventions for component themes. AppBarThemeData, BottomAppBarThemeData and InputDecorationThemeData were added to define overrides for the defaults of the component visual properties. Releases of Flutter continue to normalize component themes like these for a more consistent theming experience in the material library.

Migration guide

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In ThemeData:

  • The type of the appBarTheme property has been changed from AppBarTheme to AppBarThemeData.
  • The type of bottomAppBarTheme property has been changed from BottomAppBarTheme to BottomAppBarThemeData.
  • The type of inputDecorationTheme property has been changed from InputDecorationTheme to InputDecorationThemeData.

The return type of the component theme xTheme.of() methods and Theme.of().xTheme have also changed to xThemeData.

In DatePickerThemeData and TimePickerThemeData, the type of the inputDecorationTheme property has been changed from InputDecorationTheme to InputDecorationThemeData.

Code before migration:

dart
final AppBarTheme appBarTheme = Theme.of(context).appBarTheme;
final AppBarTheme appBarTheme = AppBarTheme.of(context);

final BottomAppBarTheme bottomAppBarTheme = Theme.of(context).bottomAppBarTheme;
final BottomAppBarTheme bottomAppBarTheme = BottomAppBarTheme.of(context);

final InputDecorationTheme inputDecorationTheme = Theme.of(context).inputDecorationTheme;
final InputDecorationTheme inputDecorationTheme = InputDecorationTheme.of(context);
final InputDecorationTheme inputDecorationTheme = Theme.of(context).datePickerTheme.inputDecorationTheme;
final InputDecorationTheme inputDecorationTheme = Theme.of(context).timePickerTheme.inputDecorationTheme;
dart
final ThemeData theme = ThemeData(
  appBarTheme: AppBarTheme(),
  bottomAppBarTheme: BottomAppBarTheme(),
  inputDecorationTheme: InputDecorationTheme(),
);

final ThemeData theme = ThemeData().copyWith(
  appBarTheme: AppBarTheme(),
  bottomAppBarTheme: BottomAppBarTheme(),
  inputDecorationTheme: InputDecorationTheme(),
);

const DatePickerThemeData datePickerTheme = DatePickerThemeData(inputDecorationTheme: InputDecorationTheme());
const TimePickerThemeData timePickerTheme = TimePickerThemeData(inputDecorationTheme: InputDecorationTheme());

Code after migration:

dart
final AppBarThemeData appBarTheme = Theme.of(context).appBarTheme;
final AppBarThemeData appBarTheme = AppBarTheme.of(context);

final BottomAppBarThemeData bottomAppBarTheme = Theme.of(context).bottomAppBarTheme;
final BottomAppBarThemeData bottomAppBarTheme = BottomAppBarTheme.of(context);

final InputDecorationThemeData inputDecorationTheme = Theme.of(context).inputDecorationTheme;
final InputDecorationThemeData inputDecorationTheme = InputDecorationTheme.of(context);
final InputDecorationThemeData inputDecorationTheme = Theme.of(context).datePickerTheme.inputDecorationTheme;
final InputDecorationThemeData inputDecorationTheme = Theme.of(context).timePickerTheme.inputDecorationTheme;
dart
final ThemeData theme = ThemeData(
  appBarTheme: AppBarThemeData(),
  bottomAppBarTheme: BottomAppBarThemeData(),
  inputDecorationTheme: InputDecorationThemeData(),
);

final ThemeData theme = ThemeData().copyWith(
  appBarTheme: AppBarThemeData(),
  bottomAppBarTheme: BottomAppBarThemeData(),
  inputDecorationTheme: InputDecorationThemeData(),
);

const DatePickerThemeData datePickerTheme = DatePickerThemeData(inputDecorationTheme: InputDecorationThemeData());
const TimePickerThemeData timePickerTheme = TimePickerThemeData(inputDecorationTheme: InputDecorationThemeData());

Timeline

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Landed in version: 3.33.0-1.0.pre
Stable release: Not yet

References

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API documentation:

Relevant PRs:

除非另有说明，本文档之所提及适用于 Flutter 的最新稳定版本，本页面最后更新时间: 2025-07-09。 查看文档源码 或者 为本页面内容提出建议.