How to make a FlutterActivity be a MethodCallHandler? I made my FlutterActivity MainActivity a MethodCallHandler: class MainActivity: FlutterActivity(), MethodCallHandler { so I implemented onMethodCall. However, to be able to process method calls, still something is missing. This is how it's done in a Flutter plugin: class MyPlugin: FlutterPlugin { private lateinit var channel : MethodChannel private val LOG_TAG: String = "MyPlugin.kt" override fun onAttachedToEngine(@NonNull flutterPluginBinding: FlutterPlugin.FlutterPluginBinding)...