chitr_method_channel.dart

private const val CHANNEL = "com.divyanshu.chitr/wallpaper"
class MainActivity: FlutterActivity() {

  override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    GeneratedPluginRegistrant.registerWith(this)

    MethodChannel(flutterView, CHANNEL).setMethodCallHandler { call, result ->
      if (call.method == "setWallpaper") {
        val arguments = call.arguments as ArrayList<*>
        val setWallpaper = setWallpaper(arguments[0] as String, applicationContext, arguments[1] as Int)
        
        if (setWallpaper == 0) {
          result.success(setWallpaper)
        } else {
          result.error("UNAVAILABLE", "", null)
        }
      } else {
            result.notImplemented()
      }
    }
  }
}