Flutter Native调用Dart端方法，并获取数据

本是古典何须时尚 2021-12-12 15:29 191阅读 0赞

参考资料：[https://blog.csdn.net/julystroy/article/details/87367520][https_blog.csdn.net_julystroy_article_details_87367520]

举个例子，我们想从Native端请求Flutter端的一个getFlutterName方法获取一个字符串。在Flutter端你需要给MethodChannel设置一个MethodCallHandler：

platform.setMethodCallHandler(platformCallHandler);
    
    Future<dynamic> platformCallHandler(MethodCall call) async {
        switch (call.method) {
                case "getFlutterName":
                return "Flutter name flutter";
                break;
        }
    }

Dart端：核心关键就是直接return 需要返回的数据即可！

Java端：就是用CallBack的形式来接收返回的数据：

mChannel.invokeMethod(RCMethodList.MethodCallBackGetUserInfo, userId, new Result() {
                @Override
                public void success(@Nullable Object arg) {
                    if (arg instanceof Map) {
                        Map map = (Map) arg;
                        String userId = (String) map.get("userId");
                        String name = (String) map.get("name");
                        String portraitUri = (String) map.get("portraitUrl");
                        UserInfo userInfo = new UserInfo(userId, name, Uri.parse(portraitUri));
                        flutterCallBack.success(userInfo);
                    }
                }
    
                @Override
                public void error(String s, @Nullable String s1, @Nullable Object o) {
                    flutterCallBack.error("获取用户信息失败:" + s, null);
                }
    
                @Override
                public void notImplemented() {
                    flutterCallBack.error("flutter 端没有实现getUserInfoByUserId接口", null);
                }
            });

转载于:https://www.cnblogs.com/hbolin/p/11169020.html

[https_blog.csdn.net_julystroy_article_details_87367520]: https://blog.csdn.net/julystroy/article/details/87367520