How to fetch Json data by using retrofit?

Question

I am new to retrofit. I need to fetch the below json data. When i run my application java.lang.ClassCastException: ad.app.retrofitexample.model.DS cannot be cast to retrofit2.Call

This type of exception is occurring. Please help me how to solve this. I explained my code in detail description in below.

 { "DS": { "LST": [ { "BID": 3, "CNM": "kumar", "BNO": "BLO41", "VID": 1, "ETI": 5, "FRM": "/Date(1512930840000)/", "TOD": "/Date(1513017240000)/", "ENM": "Birthday Party", "VNM": "murugan hall", "CNO": "8888888888", "AD1": "ram nagar", "AD2": "ram colony", "AD3": "polachi", "CTN": "Coimbatore", "CDT": "/Date(1512799571000)/", "ICN": "0", "SDT": "10/12/2017", "EDT": "11/12/2017" } ] } }

For this i used pojo class

public class DS { public DSObj getDsObj() { return dsObj; } public void setDsObj(DSObj dsObj) { this.dsObj = dsObj; } @SerializedName("DS") private DSObj dsObj; }

The above model class is for accessing json object "DS" .

 public class DSObj { @SerializedName("LST") private List<Booking> list; public List<Booking> getList() { return list; } public void setList(List<Booking> list) { this.list = list; } }

The above class DSObj is accessing the inner "DS" json object.

 public class Booking { @SerializedName("CNM") String customerName; @SerializedName("BNO") String bookingNumber; @SerializedName("CNO") String contactNumber; @SerializedName("VNM") String venueName; @SerializedName("CTN") String cityName; @SerializedName("VID") String vid; public String getVenueName() { return venueName; } public void setVenueName(String venueName) { this.venueName = venueName; } public String getCustomerName() { return customerName; } public void setCustomerName(String customerName) { this.customerName = customerName; } public String getBookingNumber() { return bookingNumber; } public void setBookingNumber(String bookingNumber) { this.bookingNumber = bookingNumber; } public String getContactNumber() { return contactNumber; } public void setContactNumber(String contactNumber) { this.contactNumber = contactNumber; } public String getCityName() { return cityName; } public void setCityName(String cityName) { this.cityName = cityName; } public String getVid() { return vid; } public void setVid(String vid) { this.vid = vid; } }

The above model class is for accessing the inner "LST" json array.

The Api Interface class for retrofit is Kpublic interface ApiInterface { String base_url = "http://195.100.1.103/mswed"; // listVenue @GET("/?api=listBlocking&eid=5&vid=1&fdt=9/11/2017&tdt=9/01/2018&uid=1") Call<DS> getVenueData(); }

The below code is initializing the retrofit and getting the data.

 @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); bookingList = (ListView)findViewById(R.id.listData); Retrofit retrofit = new Retrofit.Builder() .baseUrl(ApiInterface.base_url) .addConverterFactory(GsonConverterFactory.create()) .build(); ApiInterface apiInterface = retrofit.create(ApiInterface.class); Call<DS> call = apiInterface.getVenueData(); call.enqueue(new Callback<DS>() { @Override public void onResponse(Call<DS> call, Response<DS> response) { Call<DS> getList = (Call<DS>) response.body(); Log.e("Data",getList+""); } @Override public void onFailure(Call<DS> call, Throwable t) { Toast.makeText(getApplicationContext(), t.getMessage(), Toast.LENGTH_SHORT).show(); Log.e("Json Data Error",t.getMessage()); } }); }

When i run the application exception is thrown , i tried but i can't found solution .

follow this tutorial to remove confusion .

Pritesh - ɐʎıɥpɐΛ ɥsǝʇᴉɹꓒ
– Pritesh - ɐʎıɥpɐΛ ɥsǝʇᴉɹꓒ

2017-12-12 05:45:50 +00:00
Commented Dec 12, 2017 at 5:45 — Pritesh - ɐʎıɥpɐΛ ɥsǝʇᴉɹꓒ
– Pritesh - ɐʎıɥpɐΛ ɥsǝʇᴉɹꓒ, Commented Dec 12, 2017 at 5:45

Bhoomika Patel · Accepted Answer · 2017-12-12 05:58:48Z

For getting Perticular String from Given Response, You Should Try this.

DS dsList= response.body().getDsObj(); List<Booking> mList= dsList.getList();

Here in mList you get Array from Response, now you can use this however you want to use.

Its Great that, its helpful to You. You can reward my Answer, So Others can also use it.

KeLiuyue · Accepted Answer · 2017-12-12 05:47:13Z

1

Change

Call<DS> getList = (Call<DS>) response.body();

to

DS getList = response.body();

answered Dec 12, 2017 at 5:47

KeLiuyue

8,2274 gold badges28 silver badges43 bronze badges

5 Comments

Prabhakaran Over a year ago

Your answer worked. Is it possible to get the single string from the above JSON Array

KeLiuyue Over a year ago

What do you want ?And could you tell me something detail ?

Prabhakaran Over a year ago

Your answer solved my problem. I have small doubt the fetched json data are stored in object. Now i need to get the single element from the list of json data stored in object

KeLiuyue Over a year ago

If you want simgle string , you can use response.body().String();

Prabhakaran Over a year ago

Ok Thanks for your answer

Mr. Programmer · Accepted Answer · 2017-12-12 06:10:36Z

List mList= new ArrayList(); mList.addAll(response.body().getDsObj())

get from list

mList.get(position).getCustomerName.toString()

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