Develop Reference

Retrofit json data passing

Below are the files for retrofit.
While passing the data in the form of JSON I am getting a null response.
Could anyone guide where can be the issue occurring?
I am trying to post the data in the form of JSON using the retrofit library. Can you suggest me the right approach?
My code:
public class ApiSellarClient {
public static final String BASE_URL = "Constant.BASE_URL";// it is from constant file..
private static Retrofit retrofit = null;
public static Retrofit getClient() {
HttpLoggingInterceptor interceptor = new HttpLoggingInterceptor();
interceptor.setLevel(HttpLoggingInterceptor.Level.BODY);
OkHttpClient client = new OkHttpClient.Builder().addInterceptor(interceptor).build();
if (retrofit == null) {
retrofit = new Retrofit.Builder()
.baseUrl(BASE_URL)
.client(client)
.addConverterFactory(ScalarsConverterFactory.create())
.addConverterFactory(GsonConverterFactory.create())
.build();
}
return retrofit;
}
}
public class ApiSellarConnection {
public static Call<String> getSignInData(JSONObject json) {
return ApiSellarClient.getClient().create(ApiSellarInterface.class).getSignInData(json);
}
}
public interface ApiSellarInterface {
#Headers("Content-Type: application/json")
#POST("integration/customer/token")
Call<String> getSignInData(#Body JSONObject json);
}
// Below is the controller class.
JSONObject paramObject = new JSONObject();
try {
paramObject.put("username", etUserName.getText().toString());
paramObject.put("password", etPassword.getText().toString());
ApiSellarConnection.getSignInData(paramObject).enqueue(new Callback<String>() {
#Override
public void onResponse(Call<String> call, Response<String> response) {
Log.d("tag", "helper" + response.body());
}
#Override
public void onFailure(Call<String> call, Throwable t) {
}
});
} catch (JSONException e) {
e.printStackTrace();
}

How to send Json-rpc via retrofit2?

I tried send json-rpc via retrofit2.
This is my interface:
public interface ApiInterfaceJson {
#POST
#Headers( "Content-Type: application/json" )
Call<String> getDataJson(
#Url String url,
#Body RequestBody body);
}
Create retrofit:
retrofitJson = new Retrofit.Builder()
.addConverterFactory(ScalarsConverterFactory.create())
.baseUrl("http://localhost:8800")
.client(client)
.build();
apiInterfaceJson = retrofitJson.create(ApiInterfaceJson.class);
Call:
JSONObject paramObject = new JSONObject();
try {
paramObject.put("id", "0");
paramObject.put("name", "user");
paramObject.put("command", "finish");
}catch(Exception e){
}
RequestBody requestBody= RequestBody.create(MediaType.parse("application/json"), paramObject.toString());
MinersMonitorApplication.getApiJson().getDataJson("http://10.10.10.230:10000", requestBody).enqueue(new Callback<String>() {
#Override
public void onResponse(#NonNull Call<String> call, #NonNull Response<String> response) {}
#Override
public void onFailure(Call<String> call, Throwable t) {
}
});
The result is SocketTimeoutException.

You need RPC wrapped retrofit - https://github.com/segmentio/retrofit-jsonrpc
Also let service see that it should use json RPC by annotating:
interface MultiplicationService {
#JsonRPC("Arith.Multiply") #POST("/rpc")
Call<Integer> multiply(#Body MultiplicationArgs args);
}
Note that Retrofit is only REST Based library.

Response is Null when I use JsonObject in retrofit

When I use JsonObject as response in retrofit my output is: response: {}
Here is my code with JsonObject response:
mCall=apiService.Check_App_Version("api/check-app-version/1/"+Utility.Get_App_Version(context));
mCall.enqueue(new Callback<JSONObject>() {
#Override
public void onResponse(Call<JSONObject> call, Response<JSONObject> response) {
Log.e("response",""+response.body().toString()+" "+response.code());
}
#Override
public void onFailure(Call<JSONObject> call, Throwable t) {
Log.e("ERROR",t.toString());
}
});
But when I use Object as the response in retrofit my output is:
response: {data=[{result=1.0, is_necessary=0.0}]}
and here is code for this:
mCall=apiService.Check_App_Version("api/check-app-version/1/"+Utility.Get_App_Version(context));
mCall.enqueue(new Callback<Object>() {
#Override
public void onResponse(Call<Object> call, Response<Object> response) {
Log.e("response",""+response.body().toString()+" "+response.code());
}
#Override
public void onFailure(Call<Object> call, Throwable t) {
Log.e("ERROR",t.toString());
}
});
I want to use it as JsonObject. where is my mistake?

Please use GsonConverterFactory to get parsed response in your desired object and if you want String response with Retrofit, use ScalarsConverterFactory. You can add both factories at the same time.
OkHttpClient client = new OkHttpClient.Builder().connectTimeout(3, TimeUnit.MINUTES)
.writeTimeout(3, TimeUnit.MINUTES)
.readTimeout(3, TimeUnit.MINUTES).addInterceptor(interceptor).build();
if (retrofit == null) {
String baseUrl = "http://example.com/";
retrofit = new Retrofit.Builder()
.baseUrl(baseUrl)
.addConverterFactory(GsonConverterFactory.create())
.addConverterFactory(ScalarsConverterFactory.create())
.client(client)
.build();
}

malformed JSON Retrofit2

How to solve this error I get from the from android emulator
com.google.gson.stream.MalformedJsonException: Use JsonReader.setLenient(true) to accept malformed JSON at line 1 column 1 path $
private void registerToken(final String token) {
Retrofit retrofit = new Retrofit.Builder()
.baseUrl(Constants.BASE_URL)
.addConverterFactory(GsonConverterFactory.create())
.build();
tokenPostAPI = retrofit.create(TokenPostAPI.class);
Call<String> tokenPostCall = tokenPostAPI.request(token);
studentPostCall.enqueue(new Callback<String>() {
#Override
public void onResponse(Call<String> call, Response<String> response) {
}
#Override
public void onFailure(Call<String> call, Throwable t) {
Log.e("token", "onFailure: "+t.toString() );
Log.e("token", "onFailure: applied token "+token);
}
});
}
Here is the applied token =
"fQEG8hgG8oE:APA91bGKsH78Ft6wCDW2EtMsuC19EXl10pxkJ95ZrVwnmaofFcw8-TgxeASujQva_gM7gYijIduYL82TmR5qeExxaeHP_252ZOSx7in99ShnaKwE8bsnOyYBDAI4M34d3APCiJKpWDqC "
Total token CHARACTERS 152.

compile 'com.google.code.gson:gson:2.6.1'
Gson gson = new GsonBuilder()
.setLenient() //building as lenient mode`enter code here`
.create();
Retrofit retrofit = new Retrofit.Builder()
.baseUrl(BASE_URL)
.addConverterFactory(GsonConverterFactory.create(gson))
.build();

Sometimes Retrofit 2.1.0 callback is not working

Callback is not working on some screens sometimes while many times it's working perfectly. I have almost done project with this library. So kindly help
My ApiClient code is:
public class ApiClient {
public static final String BASE_URL = AppUtils.MainURL;
private static Retrofit retrofit = null;
public static Retrofit getClient(final String token) {
OkHttpClient defaultHttpClient = new OkHttpClient.Builder()
.addInterceptor(
new Interceptor() {
#Override
public Response intercept(Interceptor.Chain chain) throws IOException {
Request request = chain.request().newBuilder()
.addHeader("AccessToken", token).build();
return chain.proceed(request);
}
}).retryOnConnectionFailure(true).connectTimeout(1, TimeUnit.MINUTES)
.readTimeout(1, TimeUnit.MINUTES)
.writeTimeout(1, TimeUnit.MINUTES).build();
if (retrofit == null) {
retrofit = new Retrofit.Builder()
.baseUrl(BASE_URL)
.client(defaultHttpClient)
.addConverterFactory(GsonConverterFactory.create())
.build();
}
return retrofit;
}
}
and calling method is:
ApiInfo apiService =
ApiClient.getClient(preference.getToken()).create(ApiInfo.class);
Call<JobDetailsResponse> responseCall = apiService.getJobDetails(preference.getLoginId(), preference.getToken(), "" + jobId);
responseCall.enqueue(new Callback<JobDetailsResponse>() {
#Override
public void onResponse(Call<JobDetailsResponse> call, Response<JobDetailsResponse> response) {
progressDialog.dismiss();
JobDetailsResponse jobDetailsResponse = response.body();
}
#Override
public void onFailure(Call<JobDetailsResponse> call, Throwable t) {
progressDialog.dismiss();
}
});