Symptoms
- A native Android library project in the project folder does not show the PluginImporter window. Instead, it shows a default inspector window.
Cause
- Android Library Projects can only be recognized as such if they are stored in the following folder: Assets/Plugins/Android/
Resolution
If your plugin is an Android Library Project, it needs to be placed in Assets/Plugins/Android/.
Alternatively, you can pack your library project into a binary format, such as an .aar library. AAR libraries do not have this limitation and can be placed anywhere inside the Assets folder.
More Information
For more information regarding plugins, plugins for Android, how to write and read them, check the documentation listed below:
https://docs.unity3d.com/Manual/plug-in-inspector.html
https://docs.unity3d.com/Manual/AudioMixerNativeAudioPlugin.html
https://docs.unity3d.com/Manual/PluginsForAndroid.html
https://developer.android.com/studio/projects/android-library