Issues integrating RapidApi with Retrofit

Other Questions RapidAPI
1

I am a beginner with Retrofit and I need help using the Google Translate API via RapidApi. My challenge is translating an OkHttp code example into Retrofit format. Below is the OkHttp implementation for a POST request:

val httpClient = OkHttpClient()

val requestMediaType = MediaType.parse("application/x-www-form-urlencoded")
val requestBody = RequestBody.create(requestMediaType, "q=Hello%2C%20world!&target=es")
val httpRequest = Request.Builder()
    .url("https://google-translate1.p.rapidapi.com/language/translate/v2")
    .post(requestBody)
    .addHeader("content-type", "application/x-www-form-urlencoded")
    .addHeader("Accept-Encoding", "application/gzip")
    .addHeader("X-RapidAPI-Host", "google-translate1.p.rapidapi.com")
    .addHeader("X-RapidAPI-Key", API_KEY)
    .build()

val httpResponse = httpClient.newCall(httpRequest).execute()

Now, I’d like to replicate this request using Retrofit in my Android app. Here is the API interface I’ve created:

interface TranslationService {

    @Headers(
        "content-type: application/x-www-form-urlencoded",
        "Accept-Encoding: application/gzip",
        "X-RapidAPI-Host: google-translate1.p.rapidapi.com",
        "X-RapidAPI-Key: API_KEY"
    )
    @POST("translate/v2")
    suspend fun performTranslation(
        @Body query: String,
        @Query("target") targetLang: String,
        @Query("source") sourceLang: String
    ): Response<TranslationResult>
}
2

You should create a Retrofit.Builder() instance and call addConverterFactory() to define how responses are handled, like Gson for JSON. Also, pass your base url as "https://google-translate1.p.rapidapi.com/language/". Make sure your API_KEY is initialized properly within your retrofit service for headers.