How to load JSON assets into Flutter App

Question

How do I load a JSON asset into my Flutter app?

My pubspec.yaml file has the following:

  assets:
    - assets/data.json

Answer 1

I use the following to parse json in assets:

import 'dart:convert';
import 'package:flutter/services.dart' show rootBundle;
//...
Future> parseJsonFromAssets(String assetsPath) async {
    print('--- Parse json from: $assetsPath');
    return rootBundle.loadString(assetsPath)
        .then((jsonStr) => jsonDecode(jsonStr));
  }

Usage async:

parseJsonFromAssets(path)
    .then((dmap) => {
    // here you get json `dmap` as Map
    print(dmap);
}));

Usage sync:

Map dmap = await parseJsonFromAssets('assets/test.json');