[Android] Fix Unity plugins using the AndroidJavaProxy. (mUnityPlayer error) #908
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Description
Unity made changes to their AndroidJavaProxy which causes a crash when using certain packages.
This breaks popular Unity plugins like ARFoundation and Google Ads, and likely many more.
Unity expects a
mUnityPlayer
property to exist on the MainActivity, but the FlutterActivity used in Flutter apps doesn't have that property.This change is found in the following Unity versions (and maybe more):
For the full description and discussion see #836
Error
Example of the error when the app crashes:
Solution
This pull request adds a new class
FlutterUnityActivity
and interfaceIFlutterUnityActivity
.These contain a
mUnityPlayer
property that gets set by the plugin once Unity is initialized.This does add a manual setup step, which i've added to the readme.
I've had some users use my branch since August 2023 and I haven't heard of any issues yet.
Type of Change
Merging
This can be merged with a squash merge, to hide the multiple documentation commits.