Develop Reference

Why I am getting JsonSyntaxException Error

I am new to retrofit (I was using volley before), before this I was doing fine with retrofit until this error comes :-
com.google.gson.JsonSyntaxException: java.lang.IllegalStateException:
Expected int but was Boolean at line 8 column 37 path
$.response.data.book_service_id
I tried with every solution provided in this site but could not help myself since I am new to retrofit.
I think it's because of the JSON parsing error. I don't know how to handle it.
This may be a duplicate question but please help.
Below is my code:
Request and fetching data:
private void makeBookingRequest(String position) {
final CustomProgressDialog dialog = new CustomProgressDialog();
dialog.show(getSupportFragmentManager(),"tag");
SharedPreferences preferences = getSharedPreferences("MYSharedPref",MODE_PRIVATE);
String sessionkey = preferences.getString("sessionkey",null);
System.out.println(sessionkey);
String serviceId = position;
System.out.println(position);
APIEndPoints endPoints = Url.getInstance().create(APIEndPoints.class);
Call<Book> call = endPoints.makeBookingRequest(serviceId,sessionkey);
call.enqueue(new Callback<Book>() {
#Override
public void onResponse(Call<Book> call, retrofit2.Response<Book> response) {
dialog.dismiss();
if (!response.isSuccessful()) {
Toast.makeText(HomeActivity.this, "server is not responding", Toast.LENGTH_SHORT).show();
}
else if(response.body() != null){
Book bookData = response.body();
String message = bookData.response.message;
Toast.makeText(HomeActivity.this, message, Toast.LENGTH_SHORT).show();
}
}
#Override
public void onFailure(Call<Book> call, Throwable t) {
dialog.dismiss();
Toast.makeText(HomeActivity.this, "Error" + t.getLocalizedMessage(),
Toast.LENGTH_SHORT).show();
System.out.println(t);
}
});
}
Model Class:
package com.medpal.medpal_client.Models;
import com.google.gson.annotations.SerializedName;
public class Book {
#SerializedName("response")
public ResponseEntity response;
public class ResponseEntity{
#SerializedName("data")
public DataEntity data;
#SerializedName("secondary_message")
public String secondary_message;
#SerializedName("message")
public String message;
#SerializedName("code")
public int code;
}
public class DataEntity {
#SerializedName("book_service_id")
public int book_service_id;
}
}
APIENDPOINTS
#FormUrlEncoded
#Headers({"apikey: testapikey", "Content-Type:application/x-www-form-urlencoded" })
#POST("service/accept?")
Call<Book> makeBookingRequest(
#Field("service_id") String ServiceId,
#Field("session_key") String sessionKey);
URL class
public class Url {
public static final String base_url = "http://www.medpal.net/api/v1/";
public static final String serviceUrl = "http://www.medpal.net/api/v1/services?";
public static Retrofit retrofit;
public static Retrofit getInstance() {
if (retrofit == null) {
retrofit = new Retrofit.Builder()
.baseUrl(base_url)
.addConverterFactory(GsonConverterFactory.create())
.build();
}
return retrofit;
}
}
Finallyy Response from server:
{
"response": {
"error": [],
"code": 200,
"message": "Service booked",
"secondary_message": "Service booked successfully",
"data": {
"book_service_id": 35
}
}
}

To detect the problem exactly, You need to use an interceptor to log the server response, to log the server responses you can use OkHttp3 here is an example of it.
private OkHttpClient provideOkhttpClient() {
OkHttpClient.Builder client = new OkHttpClient.Builder();
client.readTimeout(15000, TimeUnit.MILLISECONDS);
client.writeTimeout(70000, TimeUnit.MILLISECONDS);
HttpLoggingInterceptor interceptor = new HttpLoggingInterceptor();
interceptor.setLevel(HttpLoggingInterceptor.Level.BODY);
client.addInterceptor(interceptor);
return client.build();
}
And add this to your Retrofit.Builder
.client(provideOkhttpClient())
And these are for Gradle
implementation 'com.squareup.okhttp3:okhttp:3.12.0'
implementation 'com.squareup.okhttp3:logging-interceptor:3.5.0'
If you do this you will see everything you sent and got from the server at your Logcat.

Retrofit 2.0: Expected BEGIN_OBJECT but was STRING at line 1 column 1 path $ [duplicate]

This question already has answers here:
"Expected BEGIN_OBJECT but was STRING at line 1 column 1"
(21 answers)
Closed 1 year ago.
I passed an update user request on postman and got a successful response (see image), Now when I try to do the same in my app, using Retrofit 2, I get error as com.google.gson.JsonSyntaxException: java.lang.IllegalStateException: Expected BEGIN_OBJECT but was STRING at line 1 column 1 path $. Interestingly I have come across this error earlier, and I know that this usually happens if my Model is not according to the response. But this time I think I have checked all the boxes but sill I'm getting the error. If anybody could figure out where I'am going wrong...
My Response in Postman:
My Pojo:
package com.example.evidya.Retrofit.Model.EditModel;
import java.util.List;
import com.google.gson.annotations.Expose;
import com.google.gson.annotations.SerializedName;
public class EditResponse {
#SerializedName("result")
#Expose
private String result;
#SerializedName("response_code")
#Expose
private Integer responseCode;
#SerializedName("msg")
#Expose
private String msg;
#SerializedName("data")
#Expose
private List<Object> data = null;
public String getResult() {
return result;
}
public void setResult(String result) {
this.result = result;
}
public Integer getResponseCode() {
return responseCode;
}
public void setResponseCode(Integer responseCode) {
this.responseCode = responseCode;
}
public String getMsg() {
return msg;
}
public void setMsg(String msg) {
this.msg = msg;
}
public List<Object> getData() {
return data;
}
public void setData(List<Object> data) {
this.data = data;
}
}
My Retrofit Client:
package com.example.evidya.Retrofit;
import com.example.evidya.Common.Common;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import java.util.concurrent.TimeUnit;
import okhttp3.OkHttpClient;
import okhttp3.logging.HttpLoggingInterceptor;
import retrofit2.Retrofit;
import retrofit2.converter.gson.GsonConverterFactory;
public class RetrofitClient {
public static Retrofit retrofit = null;
public static Retrofit getRetrofit(){
HttpLoggingInterceptor loggingInterceptor = new HttpLoggingInterceptor();
loggingInterceptor.setLevel(HttpLoggingInterceptor.Level.BODY);
OkHttpClient.Builder httpClient = new OkHttpClient.Builder() //adding custom interceptor
.connectTimeout(10, TimeUnit.SECONDS)
.readTimeout(20, TimeUnit.SECONDS)
.writeTimeout(20, TimeUnit.SECONDS);
httpClient.addInterceptor(loggingInterceptor); //add logging interceptor as the last interceptor,
// because this shall also show other interceptors
Gson gson = new GsonBuilder()
.setLenient()
.create();
if(retrofit == null){
retrofit= new Retrofit.Builder()
.baseUrl(Common.baseUrl)
.addConverterFactory(GsonConverterFactory.create(gson))
.client(httpClient.build())
.build();
}
return retrofit;
}
}
Retrofit interface:
#FormUrlEncoded
#PUT("user/update_user")
Call<EditResponse> updateUser(
#HeaderMap Map<String, String> headers,
#Field("user_id") String id,
#Field("email") String email,
#Field("name") String name,
#Field("phone") String phone,
#Field("access_token") String accessToken
);
My OkHttp Response:
My Code:
private void saveRequest() {
Log.d(TAG, "saveRequest: "+loginResponseData.getId());
progressDialog.setMessage("Updating...");
progressDialog.show();
String name, email, mobile;
name = mName.getText().toString();
email = mEmail.getText().toString();
mobile = mPhoneNumber.getText().toString();
Call<EditResponse> editResponseCall = evidya.updateUser(Common.getHeaders(), loginResponseData.getId(), email, name, mobile, loginResponseData.getAccessToken());
editResponseCall.enqueue(new Callback<EditResponse>() {
private int retryCount = 0;
#Override
public void onResponse(Call<EditResponse> call, Response<EditResponse> response) {
progressDialog.dismiss();
if(!response.isSuccessful()){
Toast.makeText(Edit_AccountActivity.this, ""+response.message(), Toast.LENGTH_SHORT).show();
return;
}
EditResponse loginResponse = null;
try {
loginResponse = response.body();
} catch (Exception e) {
Log.d(TAG, "onResponse: error parsing"+e.toString());
}
if(loginResponse != null){
if(loginResponse.getResult().toLowerCase().equals("success")){
Toast.makeText(Edit_AccountActivity.this, "Your details successfully updated", Toast.LENGTH_SHORT).show();
} else{
Toast.makeText(Edit_AccountActivity.this, ""+loginResponse.getMsg(), Toast.LENGTH_SHORT).show();
}
} else{
Toast.makeText(Edit_AccountActivity.this, "Invalid Response from server", Toast.LENGTH_SHORT).show();
}
}
#Override
public void onFailure(Call<EditResponse> call, Throwable t) {
Log.d(TAG, "onFailure: "+t.toString());
Toast.makeText(Edit_AccountActivity.this, ""+t.getMessage(), Toast.LENGTH_SHORT).show();
progressDialog.dismiss();
}
});
}

This usually happens when you're receiving something other than the expected response from the server.
To understand what's wrong try imitate your request in Postman and see what you receive from server.
Moreover you can turn on OkHttp's Logging Interceptor to see exactly what the server returns in your Logcat.

add #Headers({"Accept: application/json"})
in Retrofit interface work for me
#Headers({"Accept: application/json"})
#POST("user/classes")
Call<playlist> addToPlaylist(#Body PlaylistParm parm);

Retrofit: Redirect to LoginActivity if response code is 401

How to start LoginActivity from the interceptor(non-activity class)? I have tried the code (Interceptor) below but not working for me.
Interceptor
OkHttpClient client = new OkHttpClient.Builder().addInterceptor(new Interceptor() {
#Override
public Response intercept(Chain chain) throws IOException {
Request newRequest = chain.request().newBuilder()
.addHeader("Authorization", "Bearer " + auth_token_string)
.build();
Response response = chain.proceed(newRequest);
Log.d("MyApp", "Code : "+response.code());
if (response.code() == 401){
Intent intent = new Intent(SplashActivity.getContextOfApplication(), LoginActivity.class);
startActivity(intent);
finish(); //Not working
return response;
}
return chain.proceed(newRequest);
}
}).build();
This is the current solution I'm using, is there any better solution than this? This solution has to keep repeat on every api call.
MainActivity
call.enqueue(new Callback<Token>() {
#Override
public void onResponse(Call<Token> call, Response<Token> response) {
if(response.isSuccessful())
{
//success
}
else
{
Intent intent = new Intent(MainActivity.this.getApplicationContext(), LoginActivity.class);
startActivity(intent);
finish();
}
}
#Override
public void onFailure(Call<Token> call, Throwable t) {
}
});

Personally, I would like to suggest using event bus pattern here. You can use greenrobot implementation or whatever you want, since it's more about an architecture approach rather than concrete implementation.
Create event model
public class UnauthorizedEvent {
private static final UnauthorizedEvent INSTANCE = new UnauthorizedEvent();
public static UnauthorizedEvent instance() {
return INSTANCE;
}
private UnauthorizedEvent() {
}
}
Implement custom Interceptor which disptaches event about unauthorized reqeusts
class UnauthorizedInterceptor implements Interceptor {
#Override
public Response intercept(#NonNull Chain chain) throws IOException {
Response response = chain.proceed(chain.request());
if (response.code() == 401) {
EventBus.getDefault().post(UnauthorizedEvent.instance());
}
return response;
}
}
Create BaseActivity class which handles UnauthorizedEvent
public class BaseActivity extends Activity {
#Override
public void onStart() {
super.onStart();
EventBus.getDefault().register(this);
}
#Override
public void onStop() {
super.onStop();
EventBus.getDefault().unregister(this);
}
#Subscribe
public final void onUnauthorizedEvent(UnauthorizedEvent e) {
handleUnauthorizedEvent();
}
protected void handleUnauthorizedEvent() {
Intent intent = new Intent(this, LoginActivity.class);
startActivity(intent);
}
}
Prevent launching LoginActivity from LoginActivity
public class LoginActivty extends BaseActivity {
#Override
protected void handleUnauthorizedEvent() {
//Don't handle unauthorized event
}
}
Another approach is to not extending BaseActivity here.
Register your interceptor
OkHttpClient client = new OkHttpClient.Builder()
.addInterceptor(new UnauthorizedInterceptor())
.build();
Pros:
Loose coupling between components
Easaly extending the logic by overriding handleUnauthorizedEvent
No need to rewrite code to use new types of callbacks
Reduce human factor about making mistakes (using Callback instead of BaseCallback)
Cons:
EventBus pattern makes debugging more complicated
One more dependency or own implementation which brings new code to the project
Also, please take into account, that this example doesn't cover multithreading issues. It solves your problem of handling unauthorized requests. Thus, if two requests receive 401 than it is possible that 2 instances of LoginActivity is started.

Consider introducing a custom implementation of retrofit2.Callback interface, e.g. BaseCallback:
public abstract class BaseCallback<T> implements Callback<T> {
private final Context context;
public BaseCallback(Context context) {
this.context = context;
}
#Override
public void onResponse(Call<T> call, Response<T> response) {
if (response.code() == 401) {
// launch login activity using `this.context`
} else {
onSuccess(response.body());
}
}
#Override
public void onFailure(Call<T> call, Throwable t) {
}
abstract void onSuccess(T response);
}
Now, from the caller site you should change new Callback<Token> with new BaseCallback<Token>:
call.enqueue(new BaseCallback<Token>(context) {
#Override
void onSuccess(Token response) {
// do something with token
}
});
Although, this approach doesn't fulfil your following statement:
so I don't have to keep repeat the same code over again for each api call
nevertheless, I cannot come up with a better approach.

The simplest way is to inject activity context in Interceptor instance.
If you are using some DI tools, like Dagger2 or Toothpick it will be very simple. I recommend to use toothpick)
https://github.com/stephanenicolas/toothpick
The most code near by will be in kotlin, because it's my boilerplate code. Those thinks, that you are need to solve your problem i will write in Java.
The solution will be like this:
#Qualifier
annotation class BackendUrl
class ActivityModule(activity: BaseActivity): Module() {
init {
bind(Activity::class.java).toInstance(activity)
}
}
class NetworkModule: Module() {
init {
bind(String::class.java).withName(BackendUrl::class.java).toInstance(Constants.URL)
bind(Gson::class.java).toInstance(GsonBuilder().setDateFormat("yyyy-MM-dd'T'HH:mm:ss").create())
bind(CacheHolder::class.java).toProvider(CacheProvider::class.java).singletonInScope()
bind(OkHttpClient::class.java).toProvider(OkHttpProvider::class.java).instancesInScope()
bind(BackendApi::class.java).toProvider(BackendApiProvider::class.java).instancesInScope()
bind(RedirectInterceptor::class.java).to(RedirectInterceptor::class.java)
}
}
Than you need to create Providers for injection dependency
class BackendApiProvider #Inject constructor(
private val okHttpClient: OkHttpClient,
private val gson: Gson,
#BackendUrl private val serverPath: String
) : Provider<BackendApi> {
override fun get() =
Retrofit.Builder()
.addConverterFactory(GsonConverterFactory.create(gson))
.addCallAdapterFactory(RxJava2CallAdapterFactory.create())
.client(okHttpClient)
.baseUrl(serverPath)
.build()
.create(BackendApi::class.java)
}
And your redirect interceptor:
public class RedirectInterceptor implements Interceptor {
private final Context context;
#Inject
public RedirectInterceptor(Activity context) {
this.context = context;
}
#Override
public Response intercept(Chain chain) throws IOException {
Request newRequest = chain.request().newBuilder()
.build();
Response response = chain.proceed(newRequest);
Log.d("MyApp", "Code : "+response.code());
if (response.code() == 401){
Intent intent = new Intent(context, LoginActivity.class);
context.startActivity(intent);
((Activity) context).finish();
return response;
}
return chain.proceed(newRequest);
}
}
Oh, yes. For Authorization header will be better to create new instance of another interceptor
class HeaderInterceptor(private val token: String?) : Interceptor {
#Throws(IOException::class)
override fun intercept(chain: Interceptor.Chain): Response {
val request = chain.request()
val newRequest = request.newBuilder()
Log.d(TAG, "token: $token")
if (token != null && token.isNotBlank()) {
newRequest.addHeader("Authorization", "Bearer $token")
}
return chain.proceed(newRequest.build())
}
companion object {
private val TAG = HeaderInterceptor::class.java.toString()
}
}
And your OkhttpProvder
class OkHttpProvider #Inject constructor(cacheHolder: CacheHolder, prefs: IPreferences, redirectInterceptor: RedirectInterceptor) : Provider<OkHttpClient> {
private val client: OkHttpClient
init {
val builder = OkHttpClient.Builder()
builder
.addNetworkInterceptor(redirectInterceptor)
.addNetworkInterceptor(HeaderInterceptor(prefs.getAuthToken()))
.readTimeout(30, TimeUnit.SECONDS)
.cache(cacheHolder.okHttpCache)
client = builder.build()
}
override fun get() = client
}
Thats all! Now, you just only need to place you modules in right scopes.
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.init_view)
Toothpick.openScopes("activity scope").apply {
installModules(ActivityModule(this#YourActivity))
Toothpick.inject(this#YourActivity, this)
}
Toothpick.openScopes("activity scope", "network scope").apply {
installModules(NetworkModule())
}
// your activity code
}

This is how interceptor worked for handling 401 globally
public class ResponseHeaderInterceptor implements Interceptor {
private final Context context;
public ResponseHeaderInterceptor(Context context) {
this.context = context;
}
#NotNull
#Override
public Response intercept(#NotNull Chain chain) throws IOException {
Response response = chain.proceed(chain.request());
if(response.code() == 401){
SharedPreferences pref = context.getSharedPreferences(Constants.PREFERENCES, 0);
String userName = pref.getString("key_user_email", "");
//clear shared preferences
pref.edit().clear().apply();
Bundle params = new Bundle();
params.putString("user", userName);
FirebaseAnalytics.getInstance(context).logEvent(Constants.USER_UNAUTHORIZED_EVENT, params);
Intent intent = new Intent(this.context, IntroActivity.class);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
this.context.startActivity(intent);
}
return response;
}
}
adding to okhttp client of retrofit
var okHttpClient: OkHttpClient = OkHttpClient()
.newBuilder()
.addInterceptor(ResponseHeaderInterceptor(MyApplication.getMyApplicationContext()))//Header interceptor for logging network responses
.build()
private var retrofit: Retrofit? = null
val client: Retrofit?
get() {
if (retrofit == null) {
retrofit = Retrofit.Builder()
.client(okHttpClient)
.baseUrl(BuildConfig.SERVER)
.addConverterFactory(GsonConverterFactory.create())
.build()
}
return retrofit
}

Generalized Solution:
You can solve it by generalizing the error handling. You can use custom CallAdapterFactory to the Retrofit builder. Please refer below classes :
RxErrorHandlingCallAdapterFactory :
public class RxErrorHandlingCallAdapterFactory extends CallAdapter.Factory {
private static Context mContext = null;
private final RxJava2CallAdapterFactory original;
private RxErrorHandlingCallAdapterFactory() {
original = RxJava2CallAdapterFactory.create();
}
public static CallAdapter.Factory create(Context context) {
mContext = context;
return new RxErrorHandlingCallAdapterFactory();
}
#Override
public CallAdapter<?, ?> get(Type returnType, Annotation[] annotations, Retrofit retrofit) {
return new RxCallAdapterWrapper(retrofit, original.get(returnType, annotations, retrofit));
}
private static class RxCallAdapterWrapper<R> implements CallAdapter<R, Object> {
private final Retrofit retrofit;
private final CallAdapter<R,
Object> wrapped;
public RxCallAdapterWrapper(Retrofit retrofit, CallAdapter<R, Object> wrapped) {
this.retrofit = retrofit;
this.wrapped = wrapped;
}
#Override
public Type responseType() {
return wrapped.responseType();
}
#Override
public Object adapt(Call<R> call) {
Object result = wrapped.adapt(call);
if (result instanceof Single) {
return ((Single) result).onErrorResumeNext(new Function<Throwable, SingleSource>() {
#Override
public SingleSource apply(#NonNull Throwable throwable) throws Exception {
return Single.error(asRetrofitException(throwable));
}
});
}
if (result instanceof Observable) {
return ((Observable) result).onErrorResumeNext(new Function<Throwable, ObservableSource>() {
#Override
public ObservableSource apply(#NonNull Throwable throwable) throws Exception {
return Observable.error(asRetrofitException(throwable));
}
});
}
if (result instanceof Completable) {
return ((Completable) result).onErrorResumeNext(new Function<Throwable, CompletableSource>() {
#Override
public CompletableSource apply(#NonNull Throwable throwable) throws Exception {
return Completable.error(asRetrofitException(throwable));
}
});
}
return result;
}
private RetrofitException asRetrofitException(Throwable throwable) {
// We had non-200 http error
Log.v("log", "eror");
throwable.printStackTrace();
if (throwable instanceof HttpException) {
HttpException httpException = (HttpException) throwable;
final Response response = httpException.response();
//if ((mContext instanceof Activity)) {
String s = "Something went wrong."; //mContext.getString(R.string.something_went_wrong);
try {
s = new JSONObject(response.errorBody().string()).getString("message");
if (response.code() == 401) { // 401 Unauthorized
Intent intent = new Intent(mContext, LoginActivity.class);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
mContext.startActivity(intent);
}
} catch (JSONException | IOException e) {
e.printStackTrace();
}
return RetrofitException.unexpectedError(s, response, retrofit);
//showErrorDialog(mContext, response);
//}
// return RetrofitException.httpError(response.errorBody().toString(), response, retrofit);
}
// A network error happened
if (throwable instanceof IOException) {
return RetrofitException.networkError((IOException) throwable);
}
// We don't know what happened. We need to simply convert to an unknown error
return RetrofitException.unexpectedError(throwable);
}
}
}
RetrofitException :
public class RetrofitException extends RuntimeException {
private final String url;
private final Response response;
private final Kind kind;
private final Retrofit retrofit;
RetrofitException(String message, String url, Response response, Kind kind, Throwable exception, Retrofit retrofit) {
super(message, exception);
this.url = url;
this.response = response;
this.kind = kind;
this.retrofit = retrofit;
}
public static RetrofitException httpError(String url, Response response, Retrofit retrofit) {
String message = response.code() + " " + response.message();
return new RetrofitException(message, url, response, Kind.HTTP, null, retrofit);
}
public static RetrofitException networkError(IOException exception) {
return new RetrofitException(exception.getMessage(), null, null, Kind.NETWORK, exception, null);
}
public static RetrofitException unexpectedError(Throwable exception) {
return new RetrofitException(exception.getMessage(), null, null, Kind.UNEXPECTED, exception, null);
}
public static RetrofitException unexpectedError(String s, Response response, Retrofit retrofit) {
return new RetrofitException(s, null, null, Kind.UNEXPECTED, null, null);
}
/**
* The request URL which produced the error.
*/
public String getUrl() {
return url;
}
/**
* Response object containing status code, headers, body, etc.
*/
public Response getResponse() {
return response;
}
/**
* The event kind which triggered this error.
*/
public Kind getKind() {
return kind;
}
/**
* The Retrofit this request was executed on
*/
public Retrofit getRetrofit() {
return retrofit;
}
/**
* HTTP response body converted to specified {#code type}. {#code null} if there is no
* response.
*
* #throws IOException if unable to convert the body to the specified {#code type}.
*/
public <T> T getErrorBodyAs(Class<T> type) throws IOException {
if (response == null || response.errorBody() == null) {
return null;
}
Converter<ResponseBody, T> converter = retrofit.responseBodyConverter(type, new Annotation[0]);
return converter.convert(response.errorBody());
}
/**
* Identifies the event kind which triggered a {#link RetrofitException}.
*/
public enum Kind {
/**
* An {#link IOException} occurred while communicating to the server.
*/
NETWORK,
/**
* A non-200 HTTP status code was received from the server.
*/
HTTP,
/**
* An internal error occurred while attempting to execute a request. It is best practice to
* re-throw this exception so your application crashes.
*/
UNEXPECTED
}
}
Retrofit Builder :
Retrofit retrofit = new Retrofit.Builder()
.addCallAdapterFactory(RxErrorHandlingCallAdapterFactory.create(context))
.addConverterFactory(GsonConverterFactory.create())
.baseUrl(API_URL)
.client(client)
.build();
You can handle 401 in RxErrorHandlingCallAdapterFactory and other errors through Throwable.

How to pass Header in Retrofit 2.1.0

Hi From last two I'm stuck with this retrofit any one please help me.I have tried so many method to pass header in retrofit could but i couldn't im using Retrofit 2.0.1
build.gradle
compile 'com.google.code.gson:gson:2.6.2'
compile 'com.squareup.retrofit2:retrofit:2.1.0'
compile 'com.squareup.okhttp3:logging-interceptor:3.3.1'
compile 'com.squareup.okhttp:okhttp:2.7.2'
compile 'com.squareup.retrofit2:converter-gson:2.1.0'
And in
ApiClientHeader.jav
import okhttp3.Interceptor;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;
import retrofit2.Retrofit;
import retrofit2.converter.gson.GsonConverterFactory;
public class ApiClientHeader {
public static final String BASE_URL = "URL";
private static Retrofit retrofit = null;
public static Retrofit getClient(final String token) {
OkHttpClient okClient = new OkHttpClient.Builder()
.addInterceptor(
new Interceptor() {
#Override
public Response intercept(Interceptor.Chain chain) throws IOException {
Request original = chain.request();
// Request customization: add request headers
Request.Builder requestBuilder = original.newBuilder()
.header("Authorization", "Bearer " + token)
.method(original.method(), original.body());
Request request = requestBuilder.build();
return chain.proceed(request);
}
})
.build();
if (retrofit == null) {
retrofit = new Retrofit.Builder()
.baseUrl(BASE_URL)
.client(okClient)
.addConverterFactory(GsonConverterFactory.create())
.build();
}
return retrofit;
}
}
And In my
ApiInterface.java
#GET("profile")
Call<JsonObject> getProfile();
And In My Activity i am just calling function
private void getProfileData()
{
Singleton single = new Singleton();
String auth = single.getAuthorization();
Log.d("===========>>>>>>",auth);
ApiInterface apiService =
ApiClientHeader.getClient(auth).create(ApiInterface.class);
//showProgress(true);
Call<JsonObject> profileResponse = apiService.getProfile();
profileResponse.enqueue(new Callback<JsonObject>() {
#Override
public void onResponse(Call<JsonObject> call, Response<JsonObject> response) {
//showProgress(false);
Log.d("============>"," Call Request " +String.valueOf(call.request().toString()));
Log.d("============>", " Response code " + String.valueOf(response.code()));
// Log.d("============>", " Response Body " + String.valueOf(response.body().toString()));
if(response.code() == HttpURLConnection.HTTP_OK)
{
}
}
#Override
public void onFailure(Call<JsonObject> call, Throwable t) {
//showProgress(false);
Log.d("============>"," Call Request " +String.valueOf(call.request().toString()));
Log.d("============>"," Call Request " +String.valueOf(call.request().headers()));
Log.d("=======>", "Failure" + t.getMessage());
}
});
}
Still I am getting 403 Invalid acces.
Here i have not used any POJO class to send or receive data. Please help me.

You have to pass your authentication string like this
#GET("profile")
Call<JsonObject> getProfile((#Header("Authorization") String authorization))

#Headers({
"Accept: application/vnd.github.v3.full+json",
"User-Agent: Retrofit-Sample-App"
})
#GET("users/{username}")
Call<User> getUser(#Path("username") String username);
more info on documentation

I found one of the best link for Token based authentication using Retrofit 1.9 + OkHttp 2.4
You can add NetworkInterceptor, I have used it in my demo like:
httpClient.addNetworkInterceptor(new Interceptor() {
#Override
public Response intercept(Chain chain) throws IOException {
Request originalRequest = chain.request();
// Add authorization header with updated authorization value to intercepted request
Request authorisedRequest = originalRequest.newBuilder()
.header("Authorization", AccountAuthenticator.getAccessTokenWithTokenType(mContext))
.build();
return chain.proceed(authorisedRequest);
}
});
Dependencies:
compile 'com.squareup.retrofit2:retrofit:2.1.0'
compile 'com.squareup.retrofit2:converter-gson:2.1.0'
compile 'com.google.code.gson:gson:2.8.0'
compile 'com.squareup.okhttp3:logging-interceptor:3.3.1'
Thank you.

Try below code with your class, It is working for me:
final RestAdapter restAdapter = new RestAdapter.Builder().setClient(client).setLogLevel(RestAdapter.LogLevel.FULL).setRequestInterceptor(new RequestInterceptor() {
#Override
public void intercept(RequestFacade requestFacade) {
requestFacade.addHeader("key", "value");
requestFacade.addHeader("X-Requested-With", "XMLHttpRequest");
}
}).setConverter(new GsonConverter(gson)).setEndpoint(context.getString(R.string.base_url)).build();
Edit Post :
public class RestClient {
// private static final String BASE_URL = "http://api.plumperfect.com";
private WebServicesInterface apiService;
private static RestClient instance;
public RestClient(Context context) {
instance = this;
final Gson gson = new GsonBuilder().registerTypeAdapterFactory(new ItemTypeAdapterFactory()).setDateFormat("yyyy'-'MM'-'dd'T'HH':'mm':'ss'.'SSS'Z'").create();
// final int cacheSize = 10 * 1024 * 1024; // 10 MiB
// final File cacheDirectory = new File(context.getCacheDir().getAbsolutePath(), "HttpCache");
// final OkHttpClient client = new OkHttpClient();
// Cache cache;
// try {
// cache = new Cache(cacheDirectory, cacheSize);
// client.setCache(cache);
// } catch (IOException e) {
// e.printStackTrace();
// }
final OkHttpClient okHttpClient = new OkHttpClient();
final Client client = new OkClient(okHttpClient);
final RestAdapter restAdapter = new RestAdapter.Builder().setClient(client).setLogLevel(RestAdapter.LogLevel.FULL).setRequestInterceptor(new RequestInterceptor() {
#Override
public void intercept(RequestFacade requestFacade) {
requestFacade.addHeader("key", "value");
requestFacade.addHeader("X-Requested-With", "XMLHttpRequest");
}
}).setConverter(new GsonConverter(gson)).setEndpoint(context.getString(R.string.base_url)).build();
apiService = restAdapter.create(WebServicesInterface.class);
}
public WebServicesInterface getApiService() {
return apiService;
}
public static RestClient getInstance() {
return instance;
}
}
Secound Class :
public class ItemTypeAdapterFactory implements TypeAdapterFactory {
#Override
public <T> TypeAdapter<T> create(Gson gson, TypeToken<T> type) {
final TypeAdapter<T> delegate = gson.getDelegateAdapter(this, type);
final TypeAdapter<JsonElement> elementAdapter = gson.getAdapter(JsonElement.class);
return new TypeAdapter<T>() {
public void write(JsonWriter out, T value) throws IOException {
delegate.write(out, value);
}
public T read(JsonReader in) throws IOException {
JsonElement jsonElement = elementAdapter.read(in);
if (jsonElement.isJsonObject()) {
JsonObject jsonObject = jsonElement.getAsJsonObject();
if (jsonObject.has(Constants.DATA) && jsonObject.get(Constants.DATA).isJsonObject()) {
jsonElement = jsonObject.get(Constants.DATA);
}
}
return delegate.fromJsonTree(jsonElement);
}
}.nullSafe();
}
}

Retrofit2 How to get redirect url #HEAD("/")

I have a minified URL and I want to have the final URL
With Retrofit 1.9 I used to do this :
#HEAD("/XXXXXXXXX")
void fetchFinalUrl(Callback<String> cb);
public void getUrl() {
mMinifyService.fetchFinalUrl(new Callback<String>() {
#Override
public void success(String s, Response response) {
response.getUrl();
}
[...]
}
But now with Retrofit 2 .getUrl() not exist any ideas how to do this?
Thanks in advance.
EDIT
Finally got it!
public class ApiProvider<T> {
private Retrofit retrofit;
private static final String END_POINT_MINIFY = "XXXXXXX";
public ApiProvider() {
initAdapter();
}
public T getService(Class<T> service) {
return retrofit.create(service);
}
private void initAdapter() {
HttpLoggingInterceptor interceptor = new HttpLoggingInterceptor();
interceptor.setLevel(HttpLoggingInterceptor.Level.BODY);
OkHttpClient client = new OkHttpClient.Builder()
.addInterceptor(interceptor)
.followRedirects(false)
.build();
retrofit = new Retrofit.Builder()
.baseUrl(END_POINT_MINIFY)
.addConverterFactory(new ToStringConverterFactory())
.client(client)
.build();
}
}
public interface IMinifyService {
#HEAD("/XXXXXXXXX")
Call<Void> fetchFinalUrl(Callback<String> cb);
}
public class MinifyServiceImpl {
private ApiProvider<IMinifyService> mApiProvider = new ApiProvider<>();
private IMinifyService mMinifyService = mApiProvider.getService(IMinifyService.class);
public Promiser<String, Integer> fetchMinifyUrl() {
return new Promiser<>((resolve, reject) -> mMinifyService.fetchMinifyUrl().enqueue(new Callback<Void>() {
#Override
public void onResponse(Call<Void> call, Response<Void> response) {
if (response.code() >= 300 && response.code() < 400){
resole.run(response.headers().get("Location"));
} else {
reject.run(response.code());
}
}
#Override
public void onFailure(Call<Void> call, Throwable t) {
reject.run(t.hashCode());
}
}));
}
}
if you want to use Promizer --> Click here

response.raw().request().url()