目录

Deprecated API removed after v3.19

目录

Summary

#

In accordance with Flutter's Deprecation Policy, deprecated APIs that reached end of life after the 3.19 stable release have been removed.

All affected APIs have been compiled into this primary source to aid in migration. To further aid your migration, check out this quick reference sheet.

Changes

#

This section lists the deprecations by the package and affected class.

TextTheme

#

Package: flutter Supported by Flutter Fix: yes

Several TextStyle properties of TextTheme were deprecated in v3.1 to support new stylings from the Material Design specification. They are listed in the following table alongside the appropriate replacement in the new API.

Deprecation New API
headline1 displayLarge
headline2 displayMedium
headline3 displaySmall
headline4 headlineMedium
headline5 headlineSmall
headline6 titleLarge
subtitle1 titleMedium
subtitle2 titleSmall
bodyText1 bodyLarge
bodyText2 bodyMedium
caption bodySmall
button labelLarge
overline labelSmall

Migration guide

Code before migration:

dart
// TextTheme
// Base constructor
TextTheme(
  headline1: headline1Style,
  headline2: headline2Style,
  headline3: headline3Style,
  headline4: headline4Style,
  headline5: headline5Style,
  headline6: headline6Style,
  subtitle1: subtitle1Style,
  subtitle2: subtitle2Style,
  bodyText1: bodyText1Style,
  bodyText2: bodyText2Style,
  caption: captionStyle,
  button: buttonStyle,
  overline: overlineStyle,
);

// copyWith
TextTheme.copyWith(
  headline1: headline1Style,
  headline2: headline2Style,
  headline3: headline3Style,
  headline4: headline4Style,
  headline5: headline5Style,
  headline6: headline6Style,
  subtitle1: subtitle1Style,
  subtitle2: subtitle2Style,
  bodyText1: bodyText1Style,
  bodyText2: bodyText2Style,
  caption: captionStyle,
  button: buttonStyle,
  overline: overlineStyle,
);

// Getters
TextStyle style;
style = textTheme.headline1,
style = textTheme.headline2,
style = textTheme.headline3,
style = textTheme.headline4,
style = textTheme.headline5,
style = textTheme.headline6,
style = textTheme.subtitle1,
style = textTheme.subtitle2,
style = textTheme.bodyText1,
style = textTheme.bodyText2,
style = textTheme.caption,
style = textTheme.button,
style = textTheme.overline,

Code after migration:

dart
// TextTheme
// Base constructor
TextTheme(
  displayLarge: headline1Style,
  displayMedium: headline2Style,
  displaySmall: headline3Style,
  headlineMedium: headline4Style,
  headlineSmall: headline5Style,
  titleLarge: headline6Style,
  titleMedium: subtitle1Style,
  titleSmall: subtitle2Style,
  bodyLarge: bodyText1Style,
  bodyMedium: bodyText2Style,
  bodySmall: captionStyle,
  labelLarge: buttonStyle,
  labelSmall: overlineStyle,
);

TextTheme.copyWith(
  displayLarge: headline1Style,
  displayMedium: headline2Style,
  displaySmall: headline3Style,
  headlineMedium: headline4Style,
  headlineSmall: headline5Style,
  titleLarge: headline6Style,
  titleMedium: subtitle1Style,
  titleSmall: subtitle2Style,
  bodyLarge: bodyText1Style,
  bodyMedium: bodyText2Style,
  bodySmall: captionStyle,
  labelLarge: buttonStyle,
  labelSmall: overlineStyle,
);

TextStyle style;
style = textTheme.displayLarge;
style = textTheme.displayMedium;
style = textTheme.displaySmall;
style = textTheme.headlineMedium;
style = textTheme.headlineSmall;
style = textTheme.titleLarge;
style = textTheme.titleMedium;
style = textTheme.titleSmall;
style = textTheme.bodyLarge;
style = textTheme.bodyMedium;
style = textTheme.bodySmall;
style = textTheme.labelLarge;
style = textTheme.labelSmall;

References

API documentation:

Relevant PRs:

ThemeData

#

Package: flutter Supported by Flutter Fix: yes

Several Color properties of ThemeData were deprecated in v3.3 to support new stylings from the Material Design specification. These colors were errorColor, backgroundColor, bottomAppBarColor, and toggleableActiveColor. The first two are replaced by properties of the ThemeData.colorScheme, while bottomAppBarColor is replaced by the color of the component theme, BottomAppBarTheme. The toggleableActiveColor was no longer used by the framework and was removed.

Migration guide

Code before migration:

dart
var myTheme = ThemeData(
  //...
  errorColor: Colors.red,
  backgroundColor: Colors.blue,
  bottomAppBarColor: Colors.purple,
  toggleableActiveColor: Colors.orange,
  //...
);
var errorColor = myTheme.errorColor;
var backgroundColor = myTheme.backgroundColor;
var bottomAppBarColor = myTheme.bottomAppBarColor;
var toggleableActiveColor = myTheme.toggleableActiveColor;

Code after migration:

dart
var myTheme = ThemeData(
  //...
  colorScheme: ColorScheme(
    /// ...
    error: Colors.red,
    background: Colors.blue,
  ),
  bottomAppBarTheme: BottomAppBarTheme(
    color: Colors.purple,
  ),
  //...
);
var errorColor = myTheme.colorScheme.error;
var backgroundColor = myTheme.colorScheme.background;
var bottomAppBarColor = myTheme.bottomAppBarTheme.color;
var toggleableActiveColor = Colors.orange;

References

API documentation:

Relevant PRs:

CupertinoContextMenu.previewBuilder

#

Package: flutter Supported by Flutter Fix: yes

The previewBuilder was replaced by the builder of CupertinoContextMenu after v3.4. By adding builder, the entirety of the animation executed by the context menu is covered, the second half of which was performed by previewBuilder, and delineated by CupertinoContextMenu.animationOpensAt.

Migration guide

Code before migration:

dart
CupertinoContextMenu(
  previewBuilder: (BuildContext context, Animation<double> animation, Widget child) {
    return FittedBox(
      fit: BoxFit.cover,
      child: ClipRRect(
        borderRadius: BorderRadius.circular(64.0 * animation.value),
        child: Image.asset('assets/photo.jpg'),
      ),
    );
  },
  actions: <Widget>[
    CupertinoContextMenuAction(
      child: const Text('Action one'),
      onPressed: () {},
    ),
  ],
  child: FittedBox(
    fit: BoxFit.cover,
    child: Image.asset('assets/photo.jpg'),
  ),
);

Code after migration:

dart
CupertinoContextMenu(
  actions: <Widget>[
    CupertinoContextMenuAction(
      child: const Text('Action one'),
      onPressed: () {},
    ),
  ],
  builder: (BuildContext context, Animation<double> animation) {
    final Animation<BorderRadius?> borderRadiusAnimation = BorderRadiusTween(
      begin: BorderRadius.circular(0.0),
      end: BorderRadius.circular(CupertinoContextMenu.kOpenBorderRadius),
    ).animate(
      CurvedAnimation(
        parent: animation,
        curve: Interval(
          CupertinoContextMenu.animationOpensAt,
          1.0,
        ),
      ),
    );

    final Animation<Decoration> boxDecorationAnimation = DecorationTween(
      begin: const BoxDecoration(
        color: Color(0xFFFFFFFF),
        boxShadow: <BoxShadow>[],
      ),
      end: BoxDecoration(
        color: Color(0xFFFFFFFF),
        boxShadow: CupertinoContextMenu.kEndBoxShadow,
      ),
    ).animate(
      CurvedAnimation(
        parent: animation,
        curve: Interval(
          0.0,
          CupertinoContextMenu.animationOpensAt,
        )
      )
    );

    return Container(
      decoration: animation.value < CupertinoContextMenu.animationOpensAt
        ? boxDecorationAnimation.value
        : null,
      child: FittedBox(
        fit: BoxFit.cover,
        child: ClipRRect(
          borderRadius: borderRadiusAnimation.value ?? BorderRadius.circular(0.0),
          child: SizedBox(
            height: 150,
            width: 150,
            child: Image.asset('assets/photo.jpg'),
          ),
        ),
      )
    );
   }
 )

References

API documentation:

Relevant PRs:

Scrollbar.showTrackOnHover

#

Package: flutter Supported by Flutter Fix: yes

The showTrackOnHover property of Scrollbar, and its associated component theme, ScrollbarThemeData.showTrackOnHover, were replaced by the stateful property ScrollbarThemeData.trackVisibility after v3.4. By utilizing trackVisibility, all permutations of state can factor into revealing the scrollbar track, not just hover.

Migration guide

Code before migration:

dart
Scrollbar(
  showTrackOnHover: true,
  child: //...
);
ScrollbarThemeData(
  showTrackOnHover: true,
);

Code after migration:

dart
Scrollbar(
  child: //...
);
ScrollbarThemeData(
  // This will always show the track for any state.
  trackVisibility: MaterialStateProperty<bool>.all(true),
);
// Or
ScrollbarThemeData(
  // Only show on hover.
  trackVisibility: (Set<MaterialState> states) => states.contains(MaterialState.hovered),
);

References

API documentation:

Relevant PRs:

KeepAliveHandle.release method

#

Package: flutter Supported by Flutter Fix: no

The release method of KeepAliveHandle was removed and replaced by calling dispose after v3.3. This change was made because release was found to often be called without then calling dispose, leading to memory leaks. The dispose method executes the same functionality as release did now.

Migration guide

Code before migration:

dart
KeepAliveHandle handle = KeepAliveHandle();
handle.release();
handle.dispose();

Code after migration:

dart
KeepAliveHandle handle = KeepAliveHandle();
handle.dispose();

References

API documentation:

Relevant PRs:

InteractiveViewer.alignPanAxis

#

Package: flutter Supported by Flutter Fix: yes

The alignPanAxis property of InteractiveViewer was removed and replaced with panAxis after v3.3. This change was made to enable more modes of panning in InteractiveViewer.

Migration guide

Code before migration:

dart
InteractiveViewer(
  alignPanAxis: true,
);

Code after migration:

dart
InteractiveViewer(
  panAxis: PanAxis.aligned,
);

References

API documentation:

Relevant PRs:

MediaQuery.boldTextOverride

#

Package: flutter Supported by Flutter Fix: yes

The boldTextOverride method of MediaQuery was removed and replaced with boldTextOf after v3.5. This change was made as part of larger refactor of MediaQuery, most notably reducing the number of rebuilds that would be triggered by widgets that depend on it.

Migration guide

Code before migration:

dart
MediaQuery.boldTextOverride(context);

Code after migration:

dart
MediaQuery.boldTextOf(context)

References

API documentation:

Relevant PRs:

Renamed builder typedefs for AnimatedList

#

Package: flutter Supported by Flutter Fix: no

With the addition of AnimatedGrid, AnimatedList was refactored to share a common base class. The previously named AnimatedListItemBuilder and AnimatedListRemovedItemBuilder were renamed to better reflect the classes they could be used with after v3.5. Rename any references to AnimatedItemBuilder and AnimatedRemovedItemBuilder.

References

API documentation:

Relevant PRs:

FlutterDriver.enableAccessibility

#

Package: flutter_driver Supported by Flutter Fix: yes

The enableAccessibility method of flutterDriver was deprecated in v2.3. It was removed and replaced with setSemantics. This change made is possible to enable or disable accessibility, rather than only enable it.

Migration guide

Code before migration:

dart
FlutterDriver driver = FlutterDriver.connectedTo(
  // ...
);
driver.enableAccessibility();

Code after migration:

dart
FlutterDriver driver = FlutterDriver.connectedTo(
  // ...
);
driver.setSemantics(true);

References

API documentation:

Relevant PRs:

TimelineSummary.writeSummaryToFile

#

Package: flutter_driver Supported by Flutter Fix: yes

The writeSummaryToFile method of TimelineSummary was deprecated in v2.1. It was removed and replaced with writeTimelineToFile.

Migration guide

Code before migration:

dart
TimelineSummary summary = TimelineSummary.summarize(
  myTimeline,
);
summary.writeSummaryToFile(
  traceName,
  pretty: true,
);

Code after migration:

dart
TimelineSummary summary = TimelineSummary.summarize(
  myTimeline,
);
summary.writeTimelineToFile(
  traceName,
  pretty: true,
);

References

API documentation:

Relevant PRs:

Android Platform Views on API 22 and below

#

Supported by Flutter Fix: no

As of Flutter 3.0 platform views require api 23 or higher. In Flutter 3.19 we now throw UnsupportedOperationException when using platform views on android devices running api level 22 and below.

Migration guide

Set minimum api level to 23 (or higher) or check the android api level before displaying a platform view.

The previously announced deprecations for context menus, relating to ToolbarOptions as well as parts of TextSelectionController and SelectableRegionState were not removed this cycle, to allow more time for migration. Expect these deprecations to be removed in the next cycle, which will be announced again when the time comes.

Timeline

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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: 2024-10-24。 查看文档源码 或者 为本页面内容提出建议。