Flutter plugin development Unresolved reference: io

Issue

Its my first attempt to create a flutter plugin, I created flutter plugin project from android studio and its running fine, when I tried to add platform specific code for android I stuck in some issues, in the same project platform specific code editing is almost dead (no linting). I imported MyPluginProject/android in android studio and there are also some issues,

Unresolved reference: io

Here is output of flutter doctor

Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel stable, v1.7.8+hotfix.2, on Linux, locale en_US.UTF-8)

[✓] Android toolchain - develop for Android devices (Android SDK version 29.0.0)
[✓] Android Studio (version 3.4)
[✓] Connected device (1 available)

• No issues found!

Solution

Solved the problem by following these steps from this issue on github.

1. Delete the .idea folder in the project (do not know if is needed but just to be sure)
2. In Android Studio click on Open an existing Android studio project and select the folder your_plugin/example/android (It's important to open your_plugin/example/android first and then your_plugin).

Answered By - Shahzad Akram