json - flutter :意外字符(在字符1处)

Question

在Flutter中，无论我尝试解码哪个json文件，我都会得到与上述标题相同的错误。
最初，我认为这与我的项目有关，但是在启动新的模板Flutter项目后，我仍然收到相同的错误。我的根文件夹中有json文件，并将它们添加到pubspec.yaml文件中:

  assets:
      - Sample-JSON-data.json
      - Sample-employee-JSON-data.json

目前的Main.dart代码:

    var jsonString = 'Sample-JSON-data.json';
    var response = jsonDecode(jsonString);
    print(response);

我已经在多个测试站点上验证了我的json数据，并尝试了 Flutter Documentation中的各种方法。 Json数据:

{
    "type": "FeatureCollection",
    "features": [
        {
            "type": "Feature",
            "geometry": {
                "type": "Point",
                "coordinates": [
                    151.0763783444317,
                    -33.98045132346684
                ]
            }
        },
        {
            "type": "Feature",
            "geometry": {
                "type": "Point",
                "coordinates": [
                    151.07774912725728,
                    -33.97470462237792
                ]
            }
        },
        {
            "type": "Feature",
            "geometry": {
                "type": "Point",
                "coordinates": [
                    151.07774912725728,
                    -33.97470462237792
                ]
            }
        },
        {
            "type": "Feature",
            "geometry": {
                "type": "Point",
                "coordinates": [
                    151.07774912725728,
                    -33.97470462237792
                ]
            }
        },
        {
            "type": "Feature",
            "geometry": {
                "type": "Point",
                "coordinates": [
                    151.0763783444317,
                    -33.98045132346684
                ]
            }
        },
        {
            "type": "Feature",
            "geometry": {
                "type": "Point",
                "coordinates": [
                    151.07774912725728,
                    -33.97470462237792
                ]
            }
        },
        {
            "type": "Feature",
            "geometry": {
                "type": "Point",
                "coordinates": [
                    151.07774912725728,
                    -33.97470462237792
                ]
            }
        },
        {
            "type": "Feature",
            "geometry": {
                "type": "Point",
                "coordinates": [
                    151.07774912725728,
                    -33.97470462237792
                ]
            }
        },
        {
            "type": "Feature",
            "geometry": {
                "type": "Point",
                "coordinates": [
                    151.0763783444317,
                    -33.98045132346684
                ]
            }
        }
    ]
}

Answer 1

实际上，您不是从json文件加载数据。

尝试:

var jsonString = await rootBundle.loadString('Sample-JSON-data.json')