how do we get specific json object list in flutter-CodePudding

I have a json data like this format

{
    "ID": 2,
    "Name": "krish",
    "info": [{
            "Time": "07:30:00",
            "Image": "https://www.ingredion.com/content/dam/ingredion/usca-images/food/meat/cheeseburger-bread_720x560.jpg",
            "Notes": "Test"
        }, {
            "Time": "08:30:00",
            "Image": "https://www.refrigeratedfrozenfood.com/ext/resources/NEW_RD_Website/DefaultImages/default-pasta.jpg",
            "Notes": "Test1"
        }, {
            "Time": "09:30:00",
            "Image": "https://images.unsplash.com/photo-1520342868574-5fa3804e551c?ixlib=rb-0.3.5&ixid=eyJhcHBfaWQiOjEyMDd9&s=6ff92caffcdd63681a35134a6770ed3b&auto=format&fit=crop&w=1951&q=80",
            "Notes": "Testw"
        }
    ],
    "status": 5,
    "data": "passed"
}

how do we get all "Image" data only using flutter. thanks in advance.

CodePudding user response：

You could do

final responseMap = jsonDecode(responseString);
final infoList = responseMap['info'];
final imageList = infoList.map((info) => info['Image']).toList();

imageList will contain all the image links as List of String.

CodePudding user response：

Ok so from what i see the you can use the online tools to create the objects for parsing the data there is a tool online: quicktype.io which will make your task easy. I have just add the model from the tool iteself below check it.

// To parse this JSON data, do
//
//     final user = userFromJson(jsonString);

import 'dart:convert';

User userFromJson(String str) => User.fromJson(json.decode(str));

String userToJson(User data) => json.encode(data.toJson());

class User {
    User({
        this.id,
        this.name,
        this.info,
        this.status,
        this.data,
    });

    int id;
    String name;
    List<Info> info;
    int status;
    String data;

    factory User.fromJson(Map<String, dynamic> json) => User(
        id: json["ID"],
        name: json["Name"],
        info: List<Info>.from(json["info"].map((x) => Info.fromJson(x))),
        status: json["status"],
        data: json["data"],
    );

    Map<String, dynamic> toJson() => {
        "ID": id,
        "Name": name,
        "info": List<dynamic>.from(info.map((x) => x.toJson())),
        "status": status,
        "data": data,
    };
}

class Info {
    Info({
        this.time,
        this.image,
        this.notes,
    });

    String time;
    String image;
    String notes;

    factory Info.fromJson(Map<String, dynamic> json) => Info(
        time: json["Time"],
        image: json["Image"],
        notes: json["Notes"],
    );

    Map<String, dynamic> toJson() => {
        "Time": time,
        "Image": image,
        "Notes": notes,
    };
}

For more advance stuff you can use a plugin that is available on flutter pub that is retrofit Link : https://pub.dev/packages/retrofit This will auto generate all the above stuff, you just have to follow some guide lines

Do let me know if it works.