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README.md

This directory contains a partial snapshot of an old Flutter project; it is intended to replace the corresponding parts of a newly Flutter-created project to allow testing plugin builds with a legacy project.

It was originally created with Flutter 2.0.6. In general the guidelines are:

  • Pieces here should be largely self-contained rather than portions of major project components; for instance, it currently contains the entire android/ directory from a legacy project, rather than a subset of it which would be combined with a subset of a new project's android/ directory. This is to avoid random breakage in the future due to conflicts between those subsets. For instance, we could probably get away with not including android/app/src/main/res for a while, and instead layer in the versions from a new project, but then someday if the resources were renamed, there would be dangling references to the old resources in files that are included here.
  • Updates over time should be minimal. We don't expect that an unchanged project will keep working forever, but this directory should simulate a developer who has done the bare minimum to keep their project working as they have updated Flutter.
  • Updates should be logged below.

The reason for the hybrid model, rather than checking in a full legacy project, is to minimize unnecessary maintenance work. E.g., there's no need to manually keep Dart code updated for Flutter changes just to test legacy native Android build behaviors.

Manual changes to files

The following are the changes relative to running:

flutter create -a java all_packages

and then deleting everything but android/ from it:

  • Added license boilerplate.
  • Replaced jcenter in build.gradle with mavenCentral, due to the jcenter.bintray.com shutdown.
  • Update compileSdkVersion from 30 to 33 to maintain compatibility with plugins that use API 34.
  • Updates gradle-wrapper.properties from 6.7 to 6.7.1, to add support for the Kotlin gradle plugin. If a user runs into this error, the error message is clear on how to upgrade.
  • Modifies build.gradle to upgrade the Android Gradle Plugin (AGP) from version 4.1.0 to 7.0.0. If a user runs into an error with the AGP version, the warning is clear on how to upgrade the version to one that we support.
  • Modifies gradle-wrapper.properties to upgrade the Gradle version from 6.7.1 to 7.0.2. If a user runs into an error with the Gradle version, the warning is clear on how to upgrade the version to one that we support.