Flutter for Beginners

The HandsOnBackgroundProcessPlugin class

The first step is to set up the plugin, just like we already did in Chapter 9, Developing Your Own Flutter Plugin. It starts with an implementation of the static registerWith method that notifies the Flutter engine with the existence of the plugin instance:

class HandsOnBackgroundProcessPlugin(        private val context: Context) : MethodChannel.MethodCallHandler{    companion object {       ...        @JvmStatic        fun registerWith(registrar: PluginRegistry.Registrar) {            val channel = MethodChannel(                registrar.messenger(),                 "com.example.handson/plugin_channel"            )            val plugin = HandsOnBackgroundProcessPlugin(                registrar.context()            )            channel.setMethodCallHandler(plugin)        }    }    ...}

As you can see, it configures the method channel, ...