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maRci002 0b9225afdf
Shared element transition for predictive back (#154718) 
This PR adds a shared element transition for predictive back navigation,
based on the specification found here:
https://developer.android.com/design/ui/mobile/guides/patterns/predictive-back#shared-element-transition.

A new transition builder added:
`PredictiveBackPageSharedElementTransitionsBuilder`, which constructs
the shared element transition version.

<details><summary>Code sample</summary>

```dart
import 'package:flutter/material.dart';

void main() {
  runApp(const MainApp());
}

class MainApp extends StatelessWidget {
  const MainApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      theme: ThemeData(
        brightness: Brightness.light,
        pageTransitionsTheme: const PageTransitionsTheme(
          builders: {
            TargetPlatform.android: PredictiveBackPageSharedElementTransitionsBuilder(),
          },
        ),
      ),
      home: const FirstScreen(),
    );
  }
}

class FirstScreen extends StatelessWidget {
  const FirstScreen({super.key});

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('First Screen'),
      ),
      body: Center(
        child: ElevatedButton(
          onPressed: () {
            Navigator.of(context).push(
              MaterialPageRoute(builder: (_) => const SecondScreen()),
            );
          },
          child: const Text('Go to Second Screen'),
        ),
      ),
    );
  }
}

class SecondScreen extends StatelessWidget {
  const SecondScreen({super.key});

  @override
  Widget build(BuildContext context) {
    return Theme(
      data: ThemeData(brightness: Brightness.dark),
      child: Scaffold(
        appBar: AppBar(
          title: const Text('Second Screen'),
        ),
        body: const Center(
          child: Text('Hello, Predictive back!'),
        ),
      ),
    );
  }
}
```

</details>


[predictive_back_shared_element.webm](https://github.com/user-attachments/assets/1194cf09-c64f-4b1f-aa3f-10feb0ef12bd)

Partial fix for #153577

---------

Co-authored-by: Justin McCandless <jmccandless@google.com>
2025-05-19 22:06:58 +00:00
..
about_test.dart
Remove redundant useMaterial3: true (#163376)
2025-03-14 17:50:20 +00:00
action_chip_test.dart
const AnimationStyle (#160564)
2025-01-22 21:52:11 +00:00
action_icons_theme_test.dart
Remove redundant useMaterial3: true (#163376)
2025-03-14 17:50:20 +00:00
adaptive_text_selection_toolbar_test.dart
Auto-format Framework (#160545)
2024-12-19 20:06:21 +00:00
animated_icons_test.dart
Auto-format Framework (#160545)
2024-12-19 20:06:21 +00:00
app_bar_sliver_test.dart
Remove redundant useMaterial3: true (#163376)
2025-03-14 17:50:20 +00:00
app_bar_test.dart
Feat: Animate fill for material app bar (#163913)
2025-05-07 16:52:38 +00:00
app_bar_theme_test.dart
Add button icon support for animation duration (#162667)
2025-04-15 23:52:25 +00:00
app_bar_utils.dart
Feat: Animate fill for material app bar (#163913)
2025-05-07 16:52:38 +00:00
app_builder_test.dart
Auto-format Framework (#160545)
2024-12-19 20:06:21 +00:00
app_test.dart
Wire up the system text scaler from PlatformDispatcher (#159999)
2025-05-13 23:52:05 +00:00
arc_test.dart
Auto-format Framework (#160545)
2024-12-19 20:06:21 +00:00
autocomplete_test.dart
Revert "Fix hit-testing order in semantics (#167522)" (#168235)
2025-05-05 01:28:40 +00:00
back_button_test.dart
Remove redundant useMaterial3: true (#163376)
2025-03-14 17:50:20 +00:00
badge_test.dart
Remove redundant useMaterial3: true (#163376)
2025-03-14 17:50:20 +00:00
badge_theme_test.dart
Remove redundant useMaterial3: true (#163376)
2025-03-14 17:50:20 +00:00
banner_test.dart
[web] Remove HTML renderer from framework tests (#162038)
2025-01-24 21:33:27 +00:00
banner_theme_test.dart
Remove redundant useMaterial3: true (#163376)
2025-03-14 17:50:20 +00:00
bottom_app_bar_test.dart
Normalize BottomAppBarTheme (#168586)
2025-05-14 17:38:18 +00:00
bottom_app_bar_theme_test.dart
Normalize BottomAppBarTheme (#168586)
2025-05-14 17:38:18 +00:00
bottom_navigation_bar_test.dart
Adds semantics role and adjust semantics for navigation bar (#162467)
2025-04-02 21:28:56 +00:00
bottom_navigation_bar_theme_test.dart
Auto-format Framework (#160545)
2024-12-19 20:06:21 +00:00
bottom_sheet_test.dart
Add missing removeStatusListener for bottom sheets (#167899) (#167900)
2025-05-02 19:30:20 +00:00
bottom_sheet_theme_test.dart
Remove redundant useMaterial3: true (#163376)
2025-03-14 17:50:20 +00:00
button_bar_test.dart
Auto-format Framework (#160545)
2024-12-19 20:06:21 +00:00
button_bar_theme_test.dart
Auto-format Framework (#160545)
2024-12-19 20:06:21 +00:00
button_style_test.dart
fix: outline appearing over child (#167615)
2025-04-30 23:46:11 +00:00
button_theme_test.dart
Auto-format Framework (#160545)
2024-12-19 20:06:21 +00:00
calendar_date_picker_test.dart
Adds semantics role and adjust semantics for navigation bar (#162467)
2025-04-02 21:28:56 +00:00
card_test.dart
Auto-format Framework (#160545)
2024-12-19 20:06:21 +00:00
card_theme_test.dart
Remove redundant useMaterial3: true (#163376)
2025-03-14 17:50:20 +00:00
carousel_test.dart
Fix CarouselView.weighted crashes when initlal viewportDimension is 0.0 (#167628)
2025-04-28 09:22:40 +00:00
carousel_theme_test.dart
Feat: Add carousel view theme (#164769)
2025-04-16 19:10:38 +00:00
checkbox_list_tile_test.dart
Add titleAlignment to CheckboxListTile and RadioListTile (#168666)
2025-05-14 02:07:34 +00:00
checkbox_test.dart
Remove redundant useMaterial3: true (#163376)
2025-03-14 17:50:20 +00:00
checkbox_theme_test.dart
Auto-format Framework (#160545)
2024-12-19 20:06:21 +00:00
chip_test.dart
Fix Chip delete button semantic bounds (#168310)
2025-05-16 22:39:54 +00:00
chip_theme_test.dart
Remove redundant useMaterial3: true (#163376)
2025-03-14 17:50:20 +00:00
choice_chip_test.dart
Remove redundant useMaterial3: true (#163376)
2025-03-14 17:50:20 +00:00
circle_avatar_test.dart
Use wildcards (#161548)
2025-01-14 05:13:41 +00:00
color_scheme_test.dart
Auto-format Framework (#160545)
2024-12-19 20:06:21 +00:00
colors_test.dart
Auto-format Framework (#160545)
2024-12-19 20:06:21 +00:00
data_table_test_utils.dart
Auto-format Framework (#160545)
2024-12-19 20:06:21 +00:00
data_table_test.dart
[a11y] add SemanticsValidationResult (#165935)
2025-04-02 22:00:19 +00:00
data_table_theme_test.dart
Auto-format Framework (#160545)
2024-12-19 20:06:21 +00:00
date_picker_test.dart
[a11y] Semanctis flag refactor step 3: framework part (#167771)
2025-05-13 23:48:10 +00:00
date_picker_theme_test.dart
modify toggle mode style with DatePickerTheme (#164102)
2025-04-11 19:38:16 +00:00
date_range_picker_test.dart
Fix date picker flickering (#167976)
2025-04-29 15:03:09 +00:00
debug_test.dart
Remove outdated ignores (#162773)
2025-02-06 18:40:25 +00:00
desktop_text_selection_toolbar_button_test.dart
Auto-format Framework (#160545)
2024-12-19 20:06:21 +00:00
desktop_text_selection_toolbar_test.dart
Auto-format Framework (#160545)
2024-12-19 20:06:21 +00:00
dialog_test.dart
Set Dialog's maximum width to 560dp according to Material's guidelines (#166643)
2025-05-02 20:52:14 +00:00
dialog_theme_test.dart
Set Dialog's maximum width to 560dp according to Material's guidelines (#166643)
2025-05-02 20:52:14 +00:00
divider_test.dart
Remove redundant useMaterial3: true (#163376)
2025-03-14 17:50:20 +00:00
divider_theme_test.dart
Remove redundant useMaterial3: true (#163376)
2025-03-14 17:50:20 +00:00
drawer_button_test.dart
Remove redundant useMaterial3: true (#163376)
2025-03-14 17:50:20 +00:00
drawer_test.dart
Make the barrier panel on the Material Drawer non-dismissible (#164810)
2025-05-12 23:37:28 +00:00
drawer_theme_test.dart
Remove redundant useMaterial3: true (#163376)
2025-03-14 17:50:20 +00:00
dropdown_form_field_test.dart
Fix DropdownButtonFormField icon not vertically centered (#163205)
2025-05-12 21:30:47 +00:00
dropdown_menu_form_field_test.dart
Add DropdownMenuFormField (#163721)
2025-05-02 19:41:10 +00:00
dropdown_menu_test.dart
Add option to hide trailing icon in DropdownMenu (#167782)
2025-05-07 23:43:06 +00:00
dropdown_menu_theme_test.dart
Auto-format Framework (#160545)
2024-12-19 20:06:21 +00:00
dropdown_test.dart
Fix Selected DropdownMenuItem isn't highlighted on mobile (#167874)
2025-05-12 08:48:22 +00:00
elevated_button_test.dart
fix: outline appearing over child (#167615)
2025-04-30 23:46:11 +00:00
elevated_button_theme_test.dart
Remove redundant useMaterial3: true (#163376)
2025-03-14 17:50:20 +00:00
elevation_overlay_test.dart
Auto-format Framework (#160545)
2024-12-19 20:06:21 +00:00
expand_icon_test.dart
Auto-format Framework (#160545)
2024-12-19 20:06:21 +00:00
expansion_panel_test.dart
Auto-format Framework (#160545)
2024-12-19 20:06:21 +00:00
expansion_tile_test.dart
Adds semantics role and adjust semantics for navigation bar (#162467)
2025-04-02 21:28:56 +00:00
expansion_tile_theme_test.dart
const AnimationStyle (#160564)
2025-01-22 21:52:11 +00:00
filled_button_test.dart
fix: outline appearing over child (#167615)
2025-04-30 23:46:11 +00:00
filled_button_theme_test.dart
Fix buttons with icons ignore provided foregroundColor (#162880)
2025-02-13 08:33:12 +00:00
filter_chip_test.dart
[web] Remove HTML renderer from framework tests (#162038)
2025-01-24 21:33:27 +00:00
flexible_space_bar_collapse_mode_test.dart
Auto-format Framework (#160545)
2024-12-19 20:06:21 +00:00
flexible_space_bar_stretch_mode_test.dart
Auto-format Framework (#160545)
2024-12-19 20:06:21 +00:00
flexible_space_bar_test.dart
[web] Remove HTML renderer from framework tests (#162038)
2025-01-24 21:33:27 +00:00
floating_action_button_location_test.dart
Auto-format Framework (#160545)
2024-12-19 20:06:21 +00:00
floating_action_button_test.dart
Remove redundant useMaterial3: true (#163376)
2025-03-14 17:50:20 +00:00
floating_action_button_theme_test.dart
Remove redundant useMaterial3: true (#163376)
2025-03-14 17:50:20 +00:00
grid_title_test.dart
Auto-format Framework (#160545)
2024-12-19 20:06:21 +00:00
icon_button_test.dart
fix: outline appearing over child (#167615)
2025-04-30 23:46:11 +00:00
icon_button_theme_test.dart
Remove redundant useMaterial3: true (#163376)
2025-03-14 17:50:20 +00:00
icons_test.dart
Auto-format Framework (#160545)
2024-12-19 20:06:21 +00:00
inherited_theme_test.dart
Auto-format Framework (#160545)
2024-12-19 20:06:21 +00:00
ink_paint_test.dart
[web] Remove HTML renderer from framework tests (#162038)
2025-01-24 21:33:27 +00:00
ink_sparkle_test.dart
Remove redundant useMaterial3: true (#163376)
2025-03-14 17:50:20 +00:00
ink_splash_test.dart
[web] Remove HTML renderer from framework tests (#162038)
2025-01-24 21:33:27 +00:00
ink_well_test.dart
Auto-format Framework (#160545)
2024-12-19 20:06:21 +00:00
input_chip_test.dart
const AnimationStyle (#160564)
2025-01-22 21:52:11 +00:00
input_date_picker_form_field_test.dart
[a11y] add SemanticsValidationResult (#165935)
2025-04-02 22:00:19 +00:00
input_decorator_test.dart
InputDecorator - animate between transparent hoverColor and hoverColor (#168244)
2025-05-02 23:34:04 +00:00
list_tile_test.dart
Fix ListTile overwriting parent IconButtonTheme for its children (#167727) (#168480)
2025-05-09 17:23:34 +00:00
list_tile_theme_test.dart
fix(ListTileTheme): isThreeLine is missing. (#165481)
2025-04-09 04:47:20 +00:00
localizations_test.dart
Auto-format Framework (#160545)
2024-12-19 20:06:21 +00:00
magnifier_test.dart
Auto-format Framework (#160545)
2024-12-19 20:06:21 +00:00
material_button_test.dart
Auto-format Framework (#160545)
2024-12-19 20:06:21 +00:00
material_state_mixin_test.dart
Auto-format Framework (#160545)
2024-12-19 20:06:21 +00:00
material_state_property_test.dart
Auto-format Framework (#160545)
2024-12-19 20:06:21 +00:00
material_states_controller_test.dart
Auto-format Framework (#160545)
2024-12-19 20:06:21 +00:00
material_test.dart
Remove redundant useMaterial3: true (#163376)
2025-03-14 17:50:20 +00:00
menu_anchor_test.dart
Revert "Wire up MenuAnchor, MenuBar, MenuItem-related widgets to aria roles (#165596)" (#168339)
2025-05-05 23:57:33 +00:00
menu_bar_theme_test.dart
Auto-format Framework (#160545)
2024-12-19 20:06:21 +00:00
menu_button_theme_test.dart
…
menu_style_test.dart
[web] Remove HTML renderer from framework tests (#162038)
2025-01-24 21:33:27 +00:00
menu_theme_test.dart
Auto-format Framework (#160545)
2024-12-19 20:06:21 +00:00
mergeable_material_test.dart
Auto-format Framework (#160545)
2024-12-19 20:06:21 +00:00
navigation_bar_test.dart
Adds semantics role and adjust semantics for navigation bar (#162467)
2025-04-02 21:28:56 +00:00
navigation_bar_theme_test.dart
Remove redundant useMaterial3: true (#163376)
2025-03-14 17:50:20 +00:00
navigation_drawer_test.dart
Adds semantics role and adjust semantics for navigation bar (#162467)
2025-04-02 21:28:56 +00:00
navigation_drawer_theme_test.dart
Fix NavigationBar indicator overlay color (#164484)
2025-03-13 08:02:36 +00:00
navigation_rail_test.dart
Remove redundant useMaterial3: true (#163376)
2025-03-14 17:50:20 +00:00
navigation_rail_theme_test.dart
Remove redundant useMaterial3: true (#163376)
2025-03-14 17:50:20 +00:00
outlined_button_test.dart
fix: outline appearing over child (#167615)
2025-04-30 23:46:11 +00:00
outlined_button_theme_test.dart
Remove redundant useMaterial3: true (#163376)
2025-03-14 17:50:20 +00:00
page_selector_test.dart
Auto-format Framework (#160545)
2024-12-19 20:06:21 +00:00
page_test.dart
Remove redundant useMaterial3: true (#163376)
2025-03-14 17:50:20 +00:00
page_transitions_theme_test.dart
Ignore pointer on the outgoing route (#168425)
2025-05-06 23:36:52 +00:00
paginated_data_table_test.dart
Fix arrowHeadColor breaks differentiation between states (#165178)
2025-03-17 17:00:05 +00:00
persistent_bottom_sheet_test.dart
Auto-format Framework (#160545)
2024-12-19 20:06:21 +00:00
popup_menu_test.dart
Add styling parameters in PopupMenuDivider (#164790)
2025-04-03 00:33:58 +00:00
popup_menu_theme_test.dart
Remove redundant useMaterial3: true (#163376)
2025-03-14 17:50:20 +00:00
predictive_back_page_transitions_builder_test.dart
Shared element transition for predictive back (#154718)
2025-05-19 22:06:58 +00:00
progress_indicator_test.dart
fix(CircularProgressIndicator.adaptive): strokeWidth default value (#165370)
2025-04-17 03:56:17 +00:00
progress_indicator_theme_test.dart
CircularProgressIndicator throws null exception (#163356)
2025-02-20 07:48:23 +00:00
radio_list_tile_test.dart
Add titleAlignment to CheckboxListTile and RadioListTile (#168666)
2025-05-14 02:07:34 +00:00
radio_test.dart
Remove redundant useMaterial3: true (#163376)
2025-03-14 17:50:20 +00:00
radio_theme_test.dart
Auto-format Framework (#160545)
2024-12-19 20:06:21 +00:00
range_slider_test.dart
Update the RangeSlider widget to the 2024 Material Design appearance (#163736)
2025-05-19 17:10:12 +00:00
raw_material_button_test.dart
Auto-format Framework (#160545)
2024-12-19 20:06:21 +00:00
refresh_indicator_test.dart
Remove redundant useMaterial3: true (#163376)
2025-03-14 17:50:20 +00:00
reorderable_list_test.dart
Adds semantics role and adjust semantics for navigation bar (#162467)
2025-04-02 21:28:56 +00:00
scaffold_test.dart
Remove redundant useMaterial3: true (#163376)
2025-03-14 17:50:20 +00:00
scrollbar_paint_test.dart
Auto-format Framework (#160545)
2024-12-19 20:06:21 +00:00
scrollbar_test.dart
Auto-format Framework (#160545)
2024-12-19 20:06:21 +00:00
scrollbar_theme_test.dart
Auto-format Framework (#160545)
2024-12-19 20:06:21 +00:00
search_anchor_test.dart
MediaQuery picks up view data changes (#166498)
2025-05-02 23:32:32 +00:00
search_bar_theme_test.dart
Remove redundant useMaterial3: true (#163376)
2025-03-14 17:50:20 +00:00
search_test.dart
Relands "backfill custom painter semantics properties (#166375)" (#168113)
2025-05-01 18:15:49 +00:00
search_view_theme_test.dart
Remove redundant useMaterial3: true (#163376)
2025-03-14 17:50:20 +00:00
segmented_button_test.dart
Add button icon support for animation duration (#162667)
2025-04-15 23:52:25 +00:00
segmented_button_theme_test.dart
Remove redundant useMaterial3: true (#163376)
2025-03-14 17:50:20 +00:00
selection_area_test.dart
Drag handles only need to be tested on mobile platforms. (#163723)
2025-02-28 02:30:37 +00:00
slider_test.dart
Fix discrete Slider and RangeSlider to enforce thumb height padding when the track shape is non-rounded (#164703)
2025-04-29 23:44:25 +00:00
slider_theme_test.dart
Update the RangeSlider widget to the 2024 Material Design appearance (#163736)
2025-05-19 17:10:12 +00:00
snack_bar_test.dart
Remove redundant useMaterial3: true (#163376)
2025-03-14 17:50:20 +00:00
snack_bar_theme_test.dart
Remove redundant useMaterial3: true (#163376)
2025-03-14 17:50:20 +00:00
spell_check_suggestions_toolbar_layout_delegate_test.dart
Auto-format Framework (#160545)
2024-12-19 20:06:21 +00:00
spell_check_suggestions_toolbar_test.dart
Auto-format Framework (#160545)
2024-12-19 20:06:21 +00:00
stepper_test.dart
Remove redundant useMaterial3: true (#163376)
2025-03-14 17:50:20 +00:00
switch_list_tile_test.dart
feat(SwitchListTile): ensure that 'isThreeLine' can be configured through the theme. (#166820)
2025-05-06 05:25:32 +00:00
switch_test.dart
feat(Switch): Add activeThumbColor and deprecate activeColor. (#166382)
2025-04-30 18:43:49 +00:00
switch_theme_test.dart
Remove redundant useMaterial3: true (#163376)
2025-03-14 17:50:20 +00:00
tab_bar_theme_test.dart
Remove redundant useMaterial3: true (#163376)
2025-03-14 17:50:20 +00:00
tab_controller_test.dart
Auto-format Framework (#160545)
2024-12-19 20:06:21 +00:00
tabbed_scrollview_warp_test.dart
Auto-format Framework (#160545)
2024-12-19 20:06:21 +00:00
tabs_test.dart
Remove redundant useMaterial3: true (#163376)
2025-03-14 17:50:20 +00:00
tabs_utils.dart
Fix TabBar glitchy elastic Tab animation (#161514)
2025-01-15 11:23:41 +00:00
text_button_test.dart
fix: outline appearing over child (#167615)
2025-04-30 23:46:11 +00:00
text_button_theme_test.dart
Remove redundant useMaterial3: true (#163376)
2025-03-14 17:50:20 +00:00
text_field_focus_test.dart
Use wildcards (#161548)
2025-01-14 05:13:41 +00:00
text_field_helper_text_test.dart
Auto-format Framework (#160545)
2024-12-19 20:06:21 +00:00
text_field_restoration_test.dart
Auto-format Framework (#160545)
2024-12-19 20:06:21 +00:00
text_field_splash_test.dart
Remove redundant useMaterial3: true (#163376)
2025-03-14 17:50:20 +00:00
text_field_test.dart
TextField magnifier stuck on long press cancel (#167881)
2025-05-16 22:39:54 +00:00
text_form_field_restoration_test.dart
Update TextFormField restoration tests (#166678)
2025-04-10 07:11:24 +00:00
text_form_field_test.dart
MediaQuery picks up view data changes (#166498)
2025-05-02 23:32:32 +00:00
text_selection_test.dart
Auto-format Framework (#160545)
2024-12-19 20:06:21 +00:00
text_selection_theme_test.dart
Remove redundant useMaterial3: true (#163376)
2025-03-14 17:50:20 +00:00
text_selection_toolbar_test.dart
Remove redundant useMaterial3: true (#163376)
2025-03-14 17:50:20 +00:00
text_selection_toolbar_text_button_test.dart
Remove redundant useMaterial3: true (#163376)
2025-03-14 17:50:20 +00:00
text_theme_test.dart
Adds support for applying delta/factor transformations for TextTheme height, letter and word spacing (#158103)
2025-02-21 18:40:05 +00:00
theme_data_test.dart
Normalize BottomAppBarTheme (#168586)
2025-05-14 17:38:18 +00:00
theme_defaults_test.dart
Remove redundant useMaterial3: true (#163376)
2025-03-14 17:50:20 +00:00
theme_test.dart
Resolve Cupertino textstyle in MaterialBasedCupertinoThemeData (#167597)
2025-05-16 17:29:12 +00:00
time_picker_test.dart
Highlighting hour and minute input fields (#167766)
2025-05-02 01:57:19 +00:00
time_picker_theme_test.dart
Remove redundant useMaterial3: true (#163376)
2025-03-14 17:50:20 +00:00
time_test.dart
Auto-format Framework (#160545)
2024-12-19 20:06:21 +00:00
toggle_buttons_test.dart
Add button icon support for animation duration (#162667)
2025-04-15 23:52:25 +00:00
toggle_buttons_theme_test.dart
Add button icon support for animation duration (#162667)
2025-04-15 23:52:25 +00:00
tooltip_test.dart
Fix: Delay showing tooltip during page transition (#167614)
2025-04-30 18:44:36 +00:00
tooltip_theme_test.dart
feat(Tooltip): replace the height parameter with constraints (#163314)
2025-03-17 17:00:05 +00:00
tooltip_visibility_test.dart
Auto-format Framework (#160545)
2024-12-19 20:06:21 +00:00
typography_test.dart
Remove redundant useMaterial3: true (#163376)
2025-03-14 17:50:20 +00:00
user_accounts_drawer_header_test.dart
Auto-format Framework (#160545)
2024-12-19 20:06:21 +00:00
value_indicating_slider_test.dart
Auto-format Framework (#160545)
2024-12-19 20:06:21 +00:00
will_pop_test.dart
Auto-format Framework (#160545)
2024-12-19 20:06:21 +00:00