withOpacity => withAlpha (#2239)

## Pre-launch Checklist - [x] I read the [Effective Dart: Style] _recently_, and have followed its advice. - [x] I signed the [CLA]. - [x] I updated/added relevant documentation (doc comments with `///`). - [x] All existing and new tests are passing. If you need help, consider asking for advice on the #hackers-devrel channel on [Discord].  [Effective Dart: Style]: https://dart.dev/guides/language/effective-dart/style [CLA]: https://cla.developers.google.com/ [Discord]: https://github.com/flutter/flutter/blob/master/docs/contributing/Chat.md
flutter · Sep 10, 2024 · d93cf2b · d93cf2b
1 parent 67b0007
commit d93cf2b
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diff --git a/animated-responsive-layout/codelab_rebuild.yaml b/animated-responsive-layout/codelab_rebuild.yaml
@@ -377,7 +377,7 @@ steps:
           class _EmailWidgetState extends State<EmailWidget> {
             late final ColorScheme _colorScheme = Theme.of(context).colorScheme;
             late Color unselectedColor = Color.alphaBlend(
-              _colorScheme.primary.withOpacity(0.08),
+              _colorScheme.primary.withAlpha(20),
               _colorScheme.surface,
             );
 
@@ -587,7 +587,7 @@ steps:
                 return Container(
                   height: 84,
                   color: Color.alphaBlend(
-                    _colorScheme.primary.withOpacity(0.05),
+                    _colorScheme.primary.withAlpha(12),
                     _colorScheme.surface,
                   ),
                   child: Padding(
@@ -858,7 +858,7 @@ steps:
           class _FeedState extends State<Feed> {
             late final _colorScheme = Theme.of(context).colorScheme;
             late final _backgroundColor = Color.alphaBlend(
-                _colorScheme.primary.withOpacity(0.14), _colorScheme.surface);
+                _colorScheme.primary.withAlpha(36), _colorScheme.surface);
           
             @override
             Widget build(BuildContext context) {
@@ -925,7 +925,7 @@ steps:
            import 'widgets/email_list_view.dart';
           @@ -41,12 +42,20 @@ class _FeedState extends State<Feed> {
              late final _backgroundColor = Color.alphaBlend(
-                 _colorScheme.primary.withOpacity(0.14), _colorScheme.surface);
+                 _colorScheme.primary.withAlpha(36), _colorScheme.surface);
            
           +  int selectedIndex = 0;
           +
@@ -1093,7 +1093,7 @@ steps:
            
            void main() {
           @@ -43,44 +44,65 @@ class _FeedState extends State<Feed> {
-                 _colorScheme.primary.withOpacity(0.14), _colorScheme.surface);
+                 _colorScheme.primary.withAlpha(36), _colorScheme.surface);
            
              int selectedIndex = 0;
           +  bool wideScreen = false;
@@ -1641,7 +1641,7 @@ steps:
           +class _FeedState extends State<Feed> with SingleTickerProviderStateMixin {
              late final _colorScheme = Theme.of(context).colorScheme;
              late final _backgroundColor = Color.alphaBlend(
-                 _colorScheme.primary.withOpacity(0.14), _colorScheme.surface);
+                 _colorScheme.primary.withAlpha(36), _colorScheme.surface);
           +  late final _controller = AnimationController(
           +      duration: const Duration(milliseconds: 1000),
           +      reverseDuration: const Duration(milliseconds: 1250),

diff --git a/animated-responsive-layout/step_03/.gitignore b/animated-responsive-layout/step_03/.gitignore
@@ -5,9 +5,11 @@
 *.swp
 .DS_Store
 .atom/
+.build/
 .buildlog/
 .history
 .svn/
+.swiftpm/
 migrate_working_dir/
 
 # IntelliJ related

diff --git a/animated-responsive-layout/step_03/android/gradle/wrapper/gradle-wrapper.properties b/animated-responsive-layout/step_03/android/gradle/wrapper/gradle-wrapper.properties
@@ -2,4 +2,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.6.3-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.3-all.zip
diff --git a/animated-responsive-layout/step_03/android/settings.gradle b/animated-responsive-layout/step_03/android/settings.gradle
@@ -18,8 +18,8 @@ pluginManagement {
 
 plugins {
     id "dev.flutter.flutter-plugin-loader" version "1.0.0"
-    id "com.android.application" version "7.3.0" apply false
-    id "org.jetbrains.kotlin.android" version "1.7.10" apply false
+    id "com.android.application" version "8.1.0" apply false
+    id "org.jetbrains.kotlin.android" version "1.8.22" apply false
 }
 
 include ":app"
diff --git a/animated-responsive-layout/step_03/macos/Runner/AppDelegate.swift b/animated-responsive-layout/step_03/macos/Runner/AppDelegate.swift
@@ -6,4 +6,8 @@ class AppDelegate: FlutterAppDelegate {
   override func applicationShouldTerminateAfterLastWindowClosed(_ sender: NSApplication) -> Bool {
     return true
   }
+
+  override func applicationSupportsSecureRestorableState(_ app: NSApplication) -> Bool {
+    return true
+  }
 }
diff --git a/animated-responsive-layout/step_04/.gitignore b/animated-responsive-layout/step_04/.gitignore
@@ -5,9 +5,11 @@
 *.swp
 .DS_Store
 .atom/
+.build/
 .buildlog/
 .history
 .svn/
+.swiftpm/
 migrate_working_dir/
 
 # IntelliJ related

diff --git a/animated-responsive-layout/step_04/android/gradle/wrapper/gradle-wrapper.properties b/animated-responsive-layout/step_04/android/gradle/wrapper/gradle-wrapper.properties
@@ -2,4 +2,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.6.3-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.3-all.zip
diff --git a/animated-responsive-layout/step_04/android/settings.gradle b/animated-responsive-layout/step_04/android/settings.gradle
@@ -18,8 +18,8 @@ pluginManagement {
 
 plugins {
     id "dev.flutter.flutter-plugin-loader" version "1.0.0"
-    id "com.android.application" version "7.3.0" apply false
-    id "org.jetbrains.kotlin.android" version "1.7.10" apply false
+    id "com.android.application" version "8.1.0" apply false
+    id "org.jetbrains.kotlin.android" version "1.8.22" apply false
 }
 
 include ":app"
diff --git a/animated-responsive-layout/step_04/lib/main.dart b/animated-responsive-layout/step_04/lib/main.dart
@@ -39,7 +39,7 @@ class Feed extends StatefulWidget {
 class _FeedState extends State<Feed> {
   late final _colorScheme = Theme.of(context).colorScheme;
   late final _backgroundColor = Color.alphaBlend(
-      _colorScheme.primary.withOpacity(0.14), _colorScheme.surface);
+      _colorScheme.primary.withAlpha(36), _colorScheme.surface);
 
   @override
   Widget build(BuildContext context) {

diff --git a/animated-responsive-layout/step_04/lib/widgets/email_widget.dart b/animated-responsive-layout/step_04/lib/widgets/email_widget.dart
@@ -37,7 +37,7 @@ class EmailWidget extends StatefulWidget {
 class _EmailWidgetState extends State<EmailWidget> {
   late final ColorScheme _colorScheme = Theme.of(context).colorScheme;
   late Color unselectedColor = Color.alphaBlend(
-    _colorScheme.primary.withOpacity(0.08),
+    _colorScheme.primary.withAlpha(20),
     _colorScheme.surface,
   );
 
@@ -247,7 +247,7 @@ class _EmailHeadlineState extends State<EmailHeadline> {
       return Container(
         height: 84,
         color: Color.alphaBlend(
-          _colorScheme.primary.withOpacity(0.05),
+          _colorScheme.primary.withAlpha(12),
           _colorScheme.surface,
         ),
         child: Padding(

diff --git a/animated-responsive-layout/step_04/macos/Runner/AppDelegate.swift b/animated-responsive-layout/step_04/macos/Runner/AppDelegate.swift
@@ -6,4 +6,8 @@ class AppDelegate: FlutterAppDelegate {
   override func applicationShouldTerminateAfterLastWindowClosed(_ sender: NSApplication) -> Bool {
     return true
   }
+
+  override func applicationSupportsSecureRestorableState(_ app: NSApplication) -> Bool {
+    return true
+  }
 }
diff --git a/animated-responsive-layout/step_05/.gitignore b/animated-responsive-layout/step_05/.gitignore
@@ -5,9 +5,11 @@
 *.swp
 .DS_Store
 .atom/
+.build/
 .buildlog/
 .history
 .svn/
+.swiftpm/
 migrate_working_dir/
 
 # IntelliJ related

diff --git a/animated-responsive-layout/step_05/android/gradle/wrapper/gradle-wrapper.properties b/animated-responsive-layout/step_05/android/gradle/wrapper/gradle-wrapper.properties
@@ -2,4 +2,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.6.3-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.3-all.zip
diff --git a/animated-responsive-layout/step_05/android/settings.gradle b/animated-responsive-layout/step_05/android/settings.gradle
@@ -18,8 +18,8 @@ pluginManagement {
 
 plugins {
     id "dev.flutter.flutter-plugin-loader" version "1.0.0"
-    id "com.android.application" version "7.3.0" apply false
-    id "org.jetbrains.kotlin.android" version "1.7.10" apply false
+    id "com.android.application" version "8.1.0" apply false
+    id "org.jetbrains.kotlin.android" version "1.8.22" apply false
 }
 
 include ":app"
diff --git a/animated-responsive-layout/step_05/lib/main.dart b/animated-responsive-layout/step_05/lib/main.dart
@@ -40,7 +40,7 @@ class Feed extends StatefulWidget {
 class _FeedState extends State<Feed> {
   late final _colorScheme = Theme.of(context).colorScheme;
   late final _backgroundColor = Color.alphaBlend(
-      _colorScheme.primary.withOpacity(0.14), _colorScheme.surface);
+      _colorScheme.primary.withAlpha(36), _colorScheme.surface);
 
   int selectedIndex = 0;
 

diff --git a/animated-responsive-layout/step_05/lib/widgets/email_widget.dart b/animated-responsive-layout/step_05/lib/widgets/email_widget.dart
@@ -37,7 +37,7 @@ class EmailWidget extends StatefulWidget {
 class _EmailWidgetState extends State<EmailWidget> {
   late final ColorScheme _colorScheme = Theme.of(context).colorScheme;
   late Color unselectedColor = Color.alphaBlend(
-    _colorScheme.primary.withOpacity(0.08),
+    _colorScheme.primary.withAlpha(20),
     _colorScheme.surface,
   );
 
@@ -247,7 +247,7 @@ class _EmailHeadlineState extends State<EmailHeadline> {
       return Container(
         height: 84,
         color: Color.alphaBlend(
-          _colorScheme.primary.withOpacity(0.05),
+          _colorScheme.primary.withAlpha(12),
           _colorScheme.surface,
         ),
         child: Padding(

diff --git a/animated-responsive-layout/step_05/macos/Runner/AppDelegate.swift b/animated-responsive-layout/step_05/macos/Runner/AppDelegate.swift
@@ -6,4 +6,8 @@ class AppDelegate: FlutterAppDelegate {
   override func applicationShouldTerminateAfterLastWindowClosed(_ sender: NSApplication) -> Bool {
     return true
   }
+
+  override func applicationSupportsSecureRestorableState(_ app: NSApplication) -> Bool {
+    return true
+  }
 }
diff --git a/animated-responsive-layout/step_06/.gitignore b/animated-responsive-layout/step_06/.gitignore
@@ -5,9 +5,11 @@
 *.swp
 .DS_Store
 .atom/
+.build/
 .buildlog/
 .history
 .svn/
+.swiftpm/
 migrate_working_dir/
 
 # IntelliJ related

diff --git a/animated-responsive-layout/step_06/android/gradle/wrapper/gradle-wrapper.properties b/animated-responsive-layout/step_06/android/gradle/wrapper/gradle-wrapper.properties
@@ -2,4 +2,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.6.3-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.3-all.zip
diff --git a/animated-responsive-layout/step_06/android/settings.gradle b/animated-responsive-layout/step_06/android/settings.gradle
@@ -18,8 +18,8 @@ pluginManagement {
 
 plugins {
     id "dev.flutter.flutter-plugin-loader" version "1.0.0"
-    id "com.android.application" version "7.3.0" apply false
-    id "org.jetbrains.kotlin.android" version "1.7.10" apply false
+    id "com.android.application" version "8.1.0" apply false
+    id "org.jetbrains.kotlin.android" version "1.8.22" apply false
 }
 
 include ":app"
diff --git a/animated-responsive-layout/step_06/lib/main.dart b/animated-responsive-layout/step_06/lib/main.dart
@@ -41,7 +41,7 @@ class Feed extends StatefulWidget {
 class _FeedState extends State<Feed> {
   late final _colorScheme = Theme.of(context).colorScheme;
   late final _backgroundColor = Color.alphaBlend(
-      _colorScheme.primary.withOpacity(0.14), _colorScheme.surface);
+      _colorScheme.primary.withAlpha(36), _colorScheme.surface);
 
   int selectedIndex = 0;
   bool wideScreen = false;

diff --git a/animated-responsive-layout/step_06/lib/widgets/email_widget.dart b/animated-responsive-layout/step_06/lib/widgets/email_widget.dart
@@ -37,7 +37,7 @@ class EmailWidget extends StatefulWidget {
 class _EmailWidgetState extends State<EmailWidget> {
   late final ColorScheme _colorScheme = Theme.of(context).colorScheme;
   late Color unselectedColor = Color.alphaBlend(
-    _colorScheme.primary.withOpacity(0.08),
+    _colorScheme.primary.withAlpha(20),
     _colorScheme.surface,
   );
 
@@ -247,7 +247,7 @@ class _EmailHeadlineState extends State<EmailHeadline> {
       return Container(
         height: 84,
         color: Color.alphaBlend(
-          _colorScheme.primary.withOpacity(0.05),
+          _colorScheme.primary.withAlpha(12),
           _colorScheme.surface,
         ),
         child: Padding(

diff --git a/animated-responsive-layout/step_06/macos/Runner/AppDelegate.swift b/animated-responsive-layout/step_06/macos/Runner/AppDelegate.swift
@@ -6,4 +6,8 @@ class AppDelegate: FlutterAppDelegate {
   override func applicationShouldTerminateAfterLastWindowClosed(_ sender: NSApplication) -> Bool {
     return true
   }
+
+  override func applicationSupportsSecureRestorableState(_ app: NSApplication) -> Bool {
+    return true
+  }
 }
diff --git a/animated-responsive-layout/step_07/.gitignore b/animated-responsive-layout/step_07/.gitignore
@@ -5,9 +5,11 @@
 *.swp
 .DS_Store
 .atom/
+.build/
 .buildlog/
 .history
 .svn/
+.swiftpm/
 migrate_working_dir/
 
 # IntelliJ related

diff --git a/animated-responsive-layout/step_07/android/gradle/wrapper/gradle-wrapper.properties b/animated-responsive-layout/step_07/android/gradle/wrapper/gradle-wrapper.properties
@@ -2,4 +2,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.6.3-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.3-all.zip
diff --git a/animated-responsive-layout/step_07/android/settings.gradle b/animated-responsive-layout/step_07/android/settings.gradle
@@ -18,8 +18,8 @@ pluginManagement {
 
 plugins {
     id "dev.flutter.flutter-plugin-loader" version "1.0.0"
-    id "com.android.application" version "7.3.0" apply false
-    id "org.jetbrains.kotlin.android" version "1.7.10" apply false
+    id "com.android.application" version "8.1.0" apply false
+    id "org.jetbrains.kotlin.android" version "1.8.22" apply false
 }
 
 include ":app"
diff --git a/animated-responsive-layout/step_07/lib/main.dart b/animated-responsive-layout/step_07/lib/main.dart
@@ -43,7 +43,7 @@ class Feed extends StatefulWidget {
 class _FeedState extends State<Feed> with SingleTickerProviderStateMixin {
   late final _colorScheme = Theme.of(context).colorScheme;
   late final _backgroundColor = Color.alphaBlend(
-      _colorScheme.primary.withOpacity(0.14), _colorScheme.surface);
+      _colorScheme.primary.withAlpha(36), _colorScheme.surface);
   late final _controller = AnimationController(
       duration: const Duration(milliseconds: 1000),
       reverseDuration: const Duration(milliseconds: 1250),

diff --git a/animated-responsive-layout/step_07/lib/widgets/email_widget.dart b/animated-responsive-layout/step_07/lib/widgets/email_widget.dart
@@ -37,7 +37,7 @@ class EmailWidget extends StatefulWidget {
 class _EmailWidgetState extends State<EmailWidget> {
   late final ColorScheme _colorScheme = Theme.of(context).colorScheme;
   late Color unselectedColor = Color.alphaBlend(
-    _colorScheme.primary.withOpacity(0.08),
+    _colorScheme.primary.withAlpha(20),
     _colorScheme.surface,
   );
 
@@ -247,7 +247,7 @@ class _EmailHeadlineState extends State<EmailHeadline> {
       return Container(
         height: 84,
         color: Color.alphaBlend(
-          _colorScheme.primary.withOpacity(0.05),
+          _colorScheme.primary.withAlpha(12),
           _colorScheme.surface,
         ),
         child: Padding(

diff --git a/animated-responsive-layout/step_07/macos/Runner/AppDelegate.swift b/animated-responsive-layout/step_07/macos/Runner/AppDelegate.swift
@@ -6,4 +6,8 @@ class AppDelegate: FlutterAppDelegate {
   override func applicationShouldTerminateAfterLastWindowClosed(_ sender: NSApplication) -> Bool {
     return true
   }
+
+  override func applicationSupportsSecureRestorableState(_ app: NSApplication) -> Bool {
+    return true
+  }
 }
diff --git a/animated-responsive-layout/step_08/.gitignore b/animated-responsive-layout/step_08/.gitignore
@@ -5,9 +5,11 @@
 *.swp
 .DS_Store
 .atom/
+.build/
 .buildlog/
 .history
 .svn/
+.swiftpm/
 migrate_working_dir/
 
 # IntelliJ related

diff --git a/animated-responsive-layout/step_08/android/gradle/wrapper/gradle-wrapper.properties b/animated-responsive-layout/step_08/android/gradle/wrapper/gradle-wrapper.properties
@@ -2,4 +2,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.6.3-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.3-all.zip
diff --git a/animated-responsive-layout/step_08/android/settings.gradle b/animated-responsive-layout/step_08/android/settings.gradle
@@ -18,8 +18,8 @@ pluginManagement {
 
 plugins {
     id "dev.flutter.flutter-plugin-loader" version "1.0.0"
-    id "com.android.application" version "7.3.0" apply false
-    id "org.jetbrains.kotlin.android" version "1.7.10" apply false
+    id "com.android.application" version "8.1.0" apply false
+    id "org.jetbrains.kotlin.android" version "1.8.22" apply false
 }
 
 include ":app"
diff --git a/animated-responsive-layout/step_08/lib/main.dart b/animated-responsive-layout/step_08/lib/main.dart
@@ -45,7 +45,7 @@ class Feed extends StatefulWidget {
 class _FeedState extends State<Feed> with SingleTickerProviderStateMixin {
   late final _colorScheme = Theme.of(context).colorScheme;
   late final _backgroundColor = Color.alphaBlend(
-      _colorScheme.primary.withOpacity(0.14), _colorScheme.surface);
+      _colorScheme.primary.withAlpha(36), _colorScheme.surface);
   late final _controller = AnimationController(
       duration: const Duration(milliseconds: 1000),
       reverseDuration: const Duration(milliseconds: 1250),