Using Retrofit in Kotlin - kotlin

Question

I am trying to hit api using retrofit in kotlin
This is my DoinBackGround Method
private fun doinBackground() {
Utility.printMessage("in do in background.....")
try {
val hdr = HashMap<String, String>()
hdr.put("x-csrf-token", Utility.getToken(this.context!!))
val apiInterface = ApiCallRetrofit.getClient(this.mCrypt!!)!!.create(ApiInterface::class.java)
if (what.equals(0)) {
val body = RequestBody.create(MediaType.parse("application/json; charset=utf-8"), getQuery(para))
print("header...")
call = apiInterface.hitApi(url, hdr, body)
} else if (what.equals(1)) {
val imgPart = ArrayList<MultipartBody.Part>()
if (files != null) {
if (files.size > 0) {
for (i in files.indices) {
imgPart.add(preparePart("image/*", "document_file[" + files.get(i).key + "]", files.get(i).file))
}
}
call = apiInterface.hitApiImage(url, hdr, getMap(para), imgPart)
}
call?.enqueue(object : Callback<StandardReposnse> {
override fun onResponse(call: Call<StandardReposnse>, response: Response<StandardReposnse>) {
try {
Utility.printMessage("messege...." + response.body().message)
val resp = Gson().toJson(response.body())
Utility.printMessage("Response :$resp")
Utility.longLogPrint(response.body().data, "Full response : ")
Utility.printMessage("Error : " + Gson().toJson(response.errorBody()))
onPostExecute(Parseresponce(response.body()))
} catch (e: Exception) {
Parseresponce(null)
e.printStackTrace()
}
}
override fun onFailure(call: Call<StandardReposnse>, t: Throwable) {
t.printStackTrace()
if (progressDialog != null) {
progressDialog?.dismiss()
}
Parseresponce(null)
}
})
}
} catch (e: Exception) {
e.printStackTrace()
}
}
And this is my interface where I am defining all the POST methods
#POST
abstract fun hitApi(#Url api: String, #HeaderMap header: Map<String, Any>, #Body body: RequestBody): Call<StandardReposnse>
#POST
fun hitApiNoHeader(#Url api: String, #Body requestBody: RequestBody): Call<StandardReposnse>
#POST
fun test(#Url api: String, #HeaderMap headerMap: Map<String, String>, #Body requestBody: RequestBody): Call<JSONObject>
#Multipart
#POST
fun hitApiImage(#Url api: String, #HeaderMap headerMap: Map<String, String>, #PartMap bodyMap: Map<String, RequestBody>, #Part images: List<MultipartBody.Part>): Call<StandardReposnse>
Whenever I am trying to hit the Api I am getting the following exception :
java.lang.IllegalArgumentException: Parameter type must not include a type variable or wildcard: java.util.Map<java.lang.String, ?> (parameter #2)
for method ApiInterface.hitApi
at retrofit2.ServiceMethod$Builder.methodError(ServiceMethod.java:720)
at retrofit2.ServiceMethod$Builder.methodError(ServiceMethod.java:711)
at retrofit2.ServiceMethod$Builder.parameterError(ServiceMethod.java:729)
at retrofit2.ServiceMethod$Builder.build(ServiceMethod.java:193)
at retrofit2.Retrofit.loadServiceMethod(Retrofit.java:166)
This is the line where the exception occurs in doinbackground method
call = apiInterface.hitApi(url, hdr, body)
I tried #JvmSuppressWildcards before the RequestBody but it did not work, can anyone suggest whats the actual problem over here, plus nothing is printing in the log though I have used print() function should i use LOG.d?

Answer 1

Here i have fully example for it.
This dependancy add in gradle
implementation 'com.squareup.retrofit2:retrofit:2.5.0'
annotationProcessor 'com.squareup.retrofit2:retrofit:2.5.0'
implementation 'com.squareup.retrofit2:converter-gson:2.4.0'
Here now create ApiClient.kt file
object ApiClient {
val BASE_URL = "http://yourwebsite/services/"
private var retrofit: Retrofit? = null
val client: Retrofit
get() {
if (retrofit == null) {
retrofit = Retrofit.Builder()
.baseUrl(BASE_URL)
.addConverterFactory(GsonConverterFactory.create())
.build()
}
return retrofit!!
}
}
Now create APIInterface.kt
#FormUrlEncoded
#POST("users/login")
fun POST_LOGIN(
#Field("imei_number") imei_number: String,
#Field("device_token") device_token: String,
#Field("mobile") mobile: String,
#Field("password") password: String
): Call<LoginResponse>
#GET("general/init-data")
fun GENERAL_MODULE(
#Header("Authorization") auth_key: String
): Call<InitResponse>
#GET("event-gallery/list")
fun GET_Event_GALLERY(
#Header("Authorization") auth_key: String
): Call<EventListResponse>
#GET("event-gallery/photo-list")
fun GET_Event_GALLERY_PHOTO(
#Header("Authorization") auth_key: String,
#Query("id") id: Int
): Call<EventGallerListResponse>
if Any Header for token the use #Header and also When call #GET that time params use #Query and #Post that time #Fields
Now Response file
data class EventListResponse(
#SerializedName("success")
var success: Boolean,
#SerializedName("data")
var data: EventgalleryModel?,
#SerializedName("server_error"),
#SerializedName("eventgallery")
var eventgallery: ArrayList<EventListData>
var server_error: Boolean,
#SerializedName("message")
var message: String
)
Then create Model class of Response
Now time to Activity code
private fun loadData() {
card_progress.visibility = View.VISIBLE
val apiService = ApiClient.client.create(ApiInterface::class.java)
val call =
apiService.GET_FEE_INSTALMENT_LIST(PreferenceManager.getAuthKey(this#FeesInstalmentActivity)!!)
call.enqueue(object : Callback<FeeInstalmentListResponse> {
override fun onResponse(
call: Call<FeeInstalmentListResponse>,
response: Response<FeeInstalmentListResponse>
) {
card_progress.visibility = View.GONE
val data = response.body()!!.data
if (response.code() == 200 && data != null) {
if (response.body()!!.server_error) {
txt_no_data_fee.visibility = View.VISIBLE
txt_no_data_fee.text = response.body()!!.message
} else {
Log.e("data", data.toString())
if (data != null && data.feesinstalment.isEmpty()) {
txt_no_data_fee.visibility = View.VISIBLE
} else {
txt_no_data_fee.visibility = View.GONE
adapter!!.setItem(data.feesinstalment)
}
}
} else if (response.code() == 401) {
PreferenceManager.removePref(this#FeesInstalmentActivity)
startActivity(
Intent(this#FeesInstalmentActivity, LoginActivity::class.java)
.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP or Intent.FLAG_ACTIVITY_CLEAR_TASK or Intent.FLAG_ACTIVITY_NEW_TASK)
)
finish()
} else {
Toast.makeText(
this#FeesInstalmentActivity,
R.string.somethingWrong,
Toast.LENGTH_SHORT
).show()
}
}
override fun onFailure(call: Call<FeeInstalmentListResponse>, t: Throwable) {
card_progress.visibility = View.GONE
Log.e("onFailure", t.message)
txt_no_data_fee.visibility = View.VISIBLE
}
})
}
Adapter
class FeeInstalmentAdapter(
private val context: Context,
private var items: ArrayList<FeeInstalmentListData>
) : RecyclerView.Adapter() {
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
return ViewHolder(LayoutInflater.from(context).inflate(R.layout.row_fees_instalment_item, parent, false))
}
#SuppressLint("SetTextI18n")
override fun onBindViewHolder(holder: ViewHolder, position: Int) {
holder.due_date.text = DateHelper.parseData(items[position].due_date!!, "yyyy-MM-dd", "dd MMM yyyy")
holder.instalment_title.text = items[position].instalment_title
if (items[position].paid_date == null) {
holder.paid_text.visibility = View.GONE
holder.paid_date.text = context.resources.getString(R.string.UnPaid)
holder.paid_date.setTextColor(Color.parseColor("#DC143C"))
} else {
holder.paid_date.text = DateHelper.parseData(items[position].due_date!!, "yyyy-MM-dd", "dd MMM yyyy")
holder.paid_date.setTextColor(Color.parseColor("#58A259"))
}
//holder.paid_date.text = items[position].paid_date
holder.amount.text = "Rs. " + items[position].amount
holder.amount.setTextColor(Color.parseColor("#ED7136"))
}
override fun getItemCount(): Int {
return items.size
}
override fun getItemId(position: Int): Long {
return position.toLong()
}
override fun getItemViewType(position: Int): Int {
return position
}
fun setItem(holidays: ArrayList<FeeInstalmentListData>) {
items = holidays
notifyDataSetChanged()
}
class ViewHolder(view: View) : RecyclerView.ViewHolder(view) {
val due_date = view.due_date
val instalment_title = view.instalment_title
val paid_date = view.paid_date
val amount = view.amount
val paid_text = view.paidText
}
}

Answer 2

You have used:
#POST
abstract fun hitApi(#Url api: String, #HeaderMap header: Map<String, Any>, #Body body: RequestBody): Call<StandardReposnse>
And exception is:
Parameter type must not include a type variable or wildcard: java.util.Map<java.lang.String, ?> (parameter #2)
And your hitApi #2 param use wildcard actually:
#HeaderMap header: Map<String, ?>
Try to specify argument (just change Any to String). Anyway you are not probably going to put Any object than String in your request header.

Answer 3

Call it in the below mentioned way.
val callWeather = NetworkUtils.getApiInterface().getWeatherResponse("03a7949903004a0bb2590633181104", "1.909,45.909", 7)
callWeather.enqueue(object : Callback<APIXUResponse> {
override fun onResponse(call: Call<APIXUResponse>, response: Response<APIXUResponse>) {
var api :APIXUResponse? = response.body()
}
override fun onFailure(call: Call<APIXUResponse>, t: Throwable) {
}
})