463e751640
Fixes #162107 Commands that were helpful when working on this pr. `dart dev/tools/bin/generate_gradle_lockfiles.dart --no-gradle-generation` from flutter/flutter root. `./gradlew test` from packages/flutter_tools/gradle. `git add -- ":*.lockfile"` for adding only lockfile changes. `../../bin/cache/dart-sdk/bin/dart bin/test_runner.dart test -t android_java11_dependency_smoke_tests` from dev/devicelab `ktlint --editorconfig=dev/bots/test/analyze-test-input/.editorconfig --baseline=dev/bots/test/analyze-test-input/ktlint-baseline.xml packages/flutter_tools/gradle/src/ --format` formatting kotlin code. Need ktlint 1.5 ## Pre-launch Checklist - [x] I read the [Contributor Guide] and followed the process outlined there for submitting PRs. - [x] I read the [Tree Hygiene] wiki page, which explains my responsibilities. - [x] I read and followed the [Flutter Style Guide], including [Features we expect every widget to implement]. - [x] I signed the [CLA]. - [x] I listed at least one issue that this PR fixes in the description above. - [x] I updated/added relevant documentation (doc comments with `///`). - [x] I added new tests to check the change I am making, or this PR is [test-exempt]. - [x] I followed the [breaking change policy] and added [Data Driven Fixes] where supported. - [x] All existing and new tests are passing.
Examples of Flutter's layered architecture
This directory contains several self-contained examples that illustrate Flutter's layered architecture.
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raw/ These examples show how to program against the lowest layer of the system. They manually receive input packets and construct composited scenes.
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rendering/ These examples use Flutter's render tree to structure your app using a retained tree of visual objects. These objects coordinate to determine their size and position on screen and to handle events.
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widgets/ These examples use Flutter's widgets to build more elaborate apps using a reactive framework.
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services/ These examples use services available in Flutter to interact with the host platform.
To run each example, specify the demo file on the flutter run
command line, for example:
flutter run raw/spinning_square.dart
flutter run rendering/spinning_square.dart
flutter run widgets/spinning_square.dart