Attention: Here be dragons
This is the
(unstable) version of this documentation, which may document features
not available in or compatible with released stable versions of Godot.
Checking the stable version of the documentation...
Singleton that connects the engine with Android plugins to interface with native Android code.
The JNISingleton is implemented only in the Android export. It's used to call methods and connect signals from an Android plugin written in Java or Kotlin. Methods and signals can be called and connected to the JNISingleton as if it is a Node. See Java Native Interface - Wikipedia for more information.