How to Get Response as String Using Retrofit Without Using Gson or Any Other Library in Android

Get Retrofit Response as String

There are two ways:

• Out of the box Retrofit supports using OkHttp's ResponseBody type. ResponseBody is basically an abstraction on "just bytes" and has a method called string() which will consume the body as a String.

• You can add the converters-scalars artifact and add the ScalarsConverterFactory to your instance which will allow using String as your response type.

how to Access to the Response body in the retrofit?

Finally, with these changes, I was able to reach a conclusion.

ApiSeviceClass

  public void getVerifyCode(String mobile, RequestStatus requestStatus) {
        Log.i(TAG, "getVerifyCode: Called");

        HashMap<String, String> map = new HashMap<>();
        map.put("command", "register_user");
        map.put("mobile", mobile);

        Log.i(TAG, "getVerifyCode: requestCode: " + map.toString());

        retrofitApi.callBack(map).enqueue(new Callback<ResponseBody>() {
            @Override
            public void onResponse(Call<ResponseBody> call, Response<ResponseBody> response) {
                try {
                    if (response.isSuccessful()) {
                        String strResponseBody = response.body().string();
                        Log.i(TAG, "getVerifyCode:onResponse: " + strResponseBody);
                        requestStatus.onSuccess(strResponseBody);
                    }
                } catch (IOException e) {
                    Log.e(TAG, "onResponse: " + e.getMessage());
                }
            }

            @Override
            public void onFailure(Call<ResponseBody> call, Throwable t) {
                Log.e(TAG, "getVerifyCode:onFailure= " + t.getMessage());
                requestStatus.onError(new Exception(t));
            }
        });
    }

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Retrofit Callback

 @POST(".")
    Call<ResponseBody> callBack(@QueryMap Map<String, String> map);

Retrofit 2: Get JSON from Response body

Use this link to convert your JSON into POJO with select options as selected in image below

You will get a POJO class for your response like this

public class Result {

    @SerializedName("id")
    @Expose
    private Integer id;
    @SerializedName("Username")
    @Expose
    private String username;
    @SerializedName("Level")
    @Expose
    private String level;

    /**
    * 
    * @return
    * The id
    */
    public Integer getId() {
        return id;
    }

    /**
    * 
    * @param id
    * The id
    */
    public void setId(Integer id) {
        this.id = id;
    }

    /**
    * 
    * @return
    * The username
    */
    public String getUsername() {
        return username;
    }

    /**
    * 
    * @param username
    * The Username
    */
    public void setUsername(String username) {
        this.username = username;
    }

    /**
    * 
    * @return
    * The level
    */
    public String getLevel() {
        return level;
    }

    /**
    * 
    * @param level
    * The Level
    */
    public void setLevel(String level) {
        this.level = level;
    }

}

and use interface like this:

@FormUrlEncoded
@POST("/api/level")
Call<Result> checkLevel(@Field("id") int id);

and call like this:

Call<Result> call = api.checkLevel(1);
call.enqueue(new Callback<Result>() {
    @Override
    public void onResponse(Call<Result> call, Response<Result> response) { 
     if(response.isSuccessful()){
        response.body(); // have your all data
        int id =response.body().getId();
        String userName = response.body().getUsername();
        String level = response.body().getLevel();
        }else   Toast.makeText(context,response.errorBody().string(),Toast.LENGTH_SHORT).show(); // this will tell you why your api doesnt work most of time

    }

    @Override
    public void onFailure(Call<Result> call, Throwable t) {
     Toast.makeText(context,t.toString(),Toast.LENGTH_SHORT).show(); // ALL NETWORK ERROR HERE

    }
});

and use dependencies in Gradle

compile 'com.squareup.retrofit2:retrofit:2.3.0'
compile 'com.squareup.retrofit2:converter-gson:2.+'

NOTE: The error occurs because you changed your JSON into POJO (by use of addConverterFactory(GsonConverterFactory.create()) in retrofit). If you want response in JSON then remove the addConverterFactory(GsonConverterFactory.create()) from Retrofit. If not then use the above solution

Unable to get data using retrofit library

you bind a wrong model calss so you just need to change and also Your base url needs to end with "/"

RestResponse

To

RestResponseMain

API client

public class ApiClient {
    public final String baseUrl="http://services.groupkt.com/";
    public static Retrofit retrofit;

    public static Retrofit getData() {

        if (retrofit == null) {
            retrofit = new Retrofit.Builder()
                            .baseUrl(BaseUrl)
                            .addConverterFactory(GsonConverterFactory.create())
                            .build();
        }
        return retrofit;
    }
}

in API Interface and MainActivty.show below

API interface

public interface ApiInterface {
@GET("country/get/all")
Call<RestResponseMain> getData();
}

MainActivity

ApiInterface apiInterface = ApiClient.getData().create(ApiInterface.class);
            Call<RestResponseMain> call = apiInterface.getData();
            pDialog.show();
            call.enqueue(new Callback<RestResponseMain>() {
                @Override
                public void onResponse(Call<RestResponseMain> call, Response<RestResponseMain> response) {
                    pDialog.dismiss();
                    List<Result> list = response.body().getResult();
                    MyRecyclerRetrofitAdapter adapter = new MyRecyclerRetrofitAdapter(MainActivity.this,list);
                    rView.setAdapter(adapter);
                }

                @Override
                public void onFailure(Call<RestResponseMain> call, Throwable t) {

                }
            });

How to get the value with GSON / Retrofit?

1 Create your model class

public class ResponseItem {

/**
 * code : 200
 * lang : en-ms
 * text : ["Burung"]
 */

private int code;
private String lang;
private List<String> text;

public int getCode() {
    return code;
}

public void setCode(int code) {
    this.code = code;
}

public String getLang() {
    return lang;
}

public void setLang(String lang) {
    this.lang = lang;
}

public List<String> getText() {
    return text;
}

public void setText(List<String> text) {
    this.text = text;
}

}

2 inside your Retrofit method response :

 if (response.isSuccessful()) {
  ResponseItem responseItem;
  responseItem = response.body(); }

and you can call text by saying responseitem.Get("whatever u want from the model class")

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