flutter_gt_plugin

        manifestPlaceholders = [
                GETUI_APP_ID    : "appId",
                GETUI_APP_KEY   : "appKey",
                GETUI_APP_SECRET: "appSecret",
        ]

import 'package:flutter_gt_plugin/flutter_gt_plugin.dart';

dart
FlutterGtPlugin.addEventHandler(
    //接收clientId回调方法
    getClientId: (Map<String, dynamic> message) async {
       print("flutter getClientId: ${message['clientId']}");
     }, 
     //点击通知回调方法
     onOpenNotification: (Map<String, dynamic> message) async {
       print("flutter onOpenNotification: $message");
     });

dart
FlutterGtPlugin.setup(
        appId: '替换成自己的 appId',
        appKey: '替换成自己的 appKey',
        appSecret: '替换成自己的 appSecret');

dart
    FlutterGtPlugin.applyPushAuthority();