Using Retrofit 2 in Intent Service class

I am trying to fetch data from server and sync it on the background of app. I did it using AsyncTask in an Intent Service class, but now I want to make network call using Retrofit. So, I fetched data from server using retrofit but while I am saving them on the local database the main thread freezes, only after completion of the process I can do something on the Main thread. Why is this happening?

I tried both synchronus and Asynchronus request of retrofit but the problem remains. This is what I have tried so far..

//calling company api in synchronus way

    try {
        val responseCompany = apiService.company(page, headers, bodyModel).execute()
        Log.e("onResponse", "Company Response Code: ${responseCompany.code()}")
        Log.e("onResponse", "Company Response Body: ${Gson().toJson(responseCompany.body())}")

        if (responseCompany.isSuccessful) {
            val response = responseCompany.body()

            //delete company data
            if (response?.delete?.data?.size!! > 0) {
                for (i in response.delete.data.indices) {

                    val delete = response.delete.data[i]
                    Log.e(tag, "Delete Company data $i: ${delete.company_id}")
                    dbAdapter.open()
                    dbAdapter.Delete_COMPANY_NAME(delete.company_id)
                    dbAdapter.close()
                }
            }

            //insert company data
            if (response.insert.data.isNotEmpty()) {
                for (i in response.insert.data.indices) {
                    val insert = response.insert.data[i]
                    Log.e(tag, "Insert company data $i: ${insert.company_id}")
                    dbAdapter.open()
                    dbAdapter.Insert_COMPANY_NAME(insert.company_id.toString(), insert.company_name)
                    dbAdapter.close()
                }
            }

            //update company data
            if (response.update.data.isNotEmpty()) {
                for (i in response.update.data.indices) {
                    val update = response.update.data[i]
                    Log.e(tag, "Update Company data $i: ${update.company_id}")
                    dbAdapter.open()
                    dbAdapter.Update_COMPANY_NAME(update.company_id.toString(), update.company_name)
                    dbAdapter.close()
                }
            }

            val totalPage = largest(response.delete.meta.pagination.total_pages, response.insert.meta.pagination.total_pages, response.update.meta.pagination.total_pages)


                    if (page < totalPage) {
                        prefManager.pageNumber = page + 1
                        bodyModel.date = lastAdUpdate2
                        bodyModel.limit = 500
                        companyData(bodyModel)
                    } else {
                        prefManager.T_COMPANY_NAME = currentTime
                        prefManager.PAGE_NUMBER = 1
                        prefManager.TOTAL_PAGE = 1
                        prefManager.pageNumber = 1
                        prefManager.FIRST = "1"
                        pagenumber = prefManager.PAGE_NUMBER

                        Handler().postDelayed({
                            bodyModel.limit = 100
                            bodyModel.date = lastAdUpdate3
                            generics(bodyModel)
                        }, 1000)
                    }
        } else {
            prefManager.dbUpdateStatus = false
            Log.i("dataNotInsert", "data Not Insert")
        }

    } catch (e: Exception) {
        Log.e("Exception", "Company: ${e.localizedMessage}")
        e.printStackTrace()
    }

N.B: I made network call (Retrofit request) in an Intent Service class..

Any Kind of help is highly appreciated. Thank you

This problem was actually solved by replacing Intent Service with Work Manager. And Using Kotlin Coroutine

And if you want to persist with Intent Service rather than using WorkManager. Just wrapping your network call with AsyncTask will solve the problem