Android v1 embedding app and plugin creation deprecation

Summary

The flutter create templates for apps and plugins no longer create Android wrapping based on the v1 Android embedding as part of our gradual Android v1 embedding deprecation process described in our Android Migration Summary.

Application projects using the v1 Android embedding are encouraged to migrate following the steps described in Upgrading pre 1.12 Android projects.

Plugins targeting the v1 Android embedding are encouraged to migrate following the instructions in Supporting the new Android plugins APIs.

Context

In Flutter version 1.12, we launched a v2 set of Android APIs based on the io.flutter.embedding package in order to enable the add-to-app workflow on Android.

Over time, we gradually deprecated the older v1 Android embeddings based on the io.flutter.app package.

As of Q2 2020, only 26% of applications used the v1 embeddings.

Since the v2 embeddings were strongly established over the 7 months since the launch of Flutter v1.12, we disabled the creation of new app and plugin projects using the v1 embeddings.

Description of change

The flutter config command no longer has a togglable enable-android-embedding-v2 flag (which defaulted to true since v1.12). All projects created via flutter create and flutter create -t plugin exclusively use the Android v2 embedding.

Existing v1 applications continue to work.

Existing v1 applications consuming plugins now receive a warning prompt to migrate to v2 embedding.

Existing v1 applications consuming a plugin that targets only the v2 embedding won’t build and must migrate. This has been the case since v1.12. However, the likelihood of encountering this increased as plugin developers create and publish v2 only plugins.

Existing v2 applications continue to work with or without plugins.

Existing v2 applications consuming plugins that only target the v1 embedding continue to receive a warning prompt. The likelihood of encountering this decreased as plugin developers create and publish v2 plugins.

Migration guide

See the migration guide.

Timeline

Landed in version: 1.20.0-8.0
In stable release: not yet