callbackDispatcher function
void
callbackDispatcher()
Implementation
void callbackDispatcher() {
// 1. Initialize MethodChannel used to communicate with the platform portion of the plugin
const MethodChannel _backgroundChannel = const MethodChannel(Constants.BACKGROUND_CHANNEL);
// 2. Setup internal state needed for MethodChannels.
WidgetsFlutterBinding.ensureInitialized();
// 3. Listen for background events from the platform portion of the plugin.
_backgroundChannel.setMethodCallHandler((MethodCall call) async {
final args = call.arguments;
// 3.1. Retrieve callback instance for handle.
final Function callback = PluginUtilities.getCallbackFromHandle(CallbackHandle.fromRawHandle(args[0]))!;
assert(callback != null);
final type = args[1];
if (type == "onClick") {
final tag = args[2];
// 3.2. Invoke callback.
callback(tag);
}
});
}