populate province and city in two spinner using json

Question

I have two spinner that the first one contains province name and the second one spinner depends on first spinner value that contains city name. I'm using json for this app and readed some article and toturial but I can't do it right this is my json link : Link

any guide will be helpfull

thanks in advance

This json is super bad formed, it's difficult to parse with this distribution. — Skizo-ozᴉʞS ツ, Sep 30 '18 at 15:09
@Skizo-ozᴉʞS then what type of json we need to do this? could you please give me an example? — alireza, Sep 30 '18 at 16:02
@alireza hold on, I'm creating a repository for you, I'm doing it... it takes a little bit long as I expected. I'll let you know — Skizo-ozᴉʞS ツ, Sep 30 '18 at 16:03
@alireza don't do changes on your json please.... I'm doing it — Skizo-ozᴉʞS ツ, Sep 30 '18 at 16:10
@alireza will you change your json? I can give you an option — Skizo-ozᴉʞS ツ, Sep 30 '18 at 16:23
I'm sorry it's not the same... and my app is not compiling now :S — Skizo-ozᴉʞS ツ, Sep 30 '18 at 16:56
Possible duplicate of [Android : Fill Spinner From Java Code Programmatically](https://stackoverflow.com/questions/11920754/android-fill-spinner-from-java-code-programmatically) — Shubham AgaRwal, Sep 30 '18 at 17:28
If you are gonna change the json I can not help you, once you finish touching it, let me know and I'll try to help you, otherwise it's impossible, I asked you to put like the first time, if you want to do this I can finish the project, otherwise I can't. — Skizo-ozᴉʞS ツ, Sep 30 '18 at 17:50
Put your json like this : { "آذربایجان‌ شرقی": { "province_id": "1", "cities": [{ "city_id": "1", "city_name": "آذرشهر", "province": "1" }] }, "اردبيل": { "province_id": "2", "cities": [{ "city_id": "2", "city_name": "اسكو", "province": "2" }] } } — Skizo-ozᴉʞS ツ, Sep 30 '18 at 18:06
@Skizo-ozᴉʞS in fact I'm not touching json i just told back end programmer to make it like first time. now we are not going to change json response . I'm working on it — alireza, Sep 30 '18 at 18:10
Ok, it's not like the first time because you didn't have the "province_id": "2" below the province_name... let me know — Skizo-ozᴉʞS ツ, Sep 30 '18 at 18:22

score 2 · Accepted Answer · answered Sep 30 '18 at 19:44

Now with the new json the final code should be something like this :

You have a City class

public class City {
    private String city_id;
    private String city_name;
    private String province;
    //Setters and Getters

Then with this City class you can create the JSONResponse class

public class ResponseJSON {
    private String province_name;
    private String province_id;
    private List<City> city = null;
    //Setters and Getters

This is how you call your API and add the info to the Spinners

apiService = ApiClient.getClient().create(ApiInterface.class);

        Call<Map<String, ResponseJSON>> call = apiService.getProvinceAndCity();
        call.enqueue(new Callback<Map<String, ResponseJSON>>() {
            @Override
            public void onResponse(Call<Map<String, ResponseJSON>>call, Response<Map<String, ResponseJSON>> response) {
                responseJson  = response.body();
                for(Map.Entry<String, ResponseJSON> e : responseJson.entrySet())
                {
                    provincesList.add(e.getKey());
                    for(City c : e.getValue().getCity()){
                        citiesList.add(c.getCityName());
                    }
                }
                createAdapter();
            }

            @Override
            public void onFailure(Call<Map<String, ResponseJSON>>call, Throwable t) {

            }
        });

And then you have to detect the OnItemSelectedListener event, so you can create a method to do this and update the city list according to your province

private AdapterView.OnItemSelectedListener provinceListener = new AdapterView.OnItemSelectedListener() {
        @Override
        public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
            citiesList.clear();
            String provinceSelected = spinner_province.getItemAtPosition(position).toString();
            for(Map.Entry<String, ResponseJSON> e : responseJson.entrySet())
            {
                if(e.getKey().equals(provinceSelected)){
                    for(City c : e.getValue().getCity()){
                        citiesList.add(c.getCityName());
                    }
                }
            }
            cityAdapter.notifyDataSetChanged();
        }

        @Override
        public void onNothingSelected(AdapterView<?> parent) {

        }
    };

Hope it helps to you, I'll put the ProvinceAndCity2SpinnerFromJson project there so you can understand it better.

@alireza create another question this is other problem and link it to me and I'll try to figure it out :) — Skizo-ozᴉʞS ツ, Oct 10 '18 at 08:09
I have mentioned you under the question https://stackoverflow.com/questions/52716627/how-to-get-spinners-selected-items-id-that-comes-from-json?noredirect=1#comment92359714_52716627 — alireza, Oct 10 '18 at 10:42

populate province and city in two spinner using json

1 Answers1