Android Networking: Fundamentals

Sep 6 2022 · Kotlin 1.6, Android 12, Android Studio Chipmunk | 2021.2.1 Patch 1

Part 2: Implement Retrofit Basics

12. Implement a POST Call

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Notes: 12. Implement a POST Call

The student materials have been reviewed and are updated as of July 2022.

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Now that you’ve provided the Retrofit client and the api service, you can provide the API calls. To do this, you’ll need a few features and annotation classes from Retrofit.

@POST("/api/register")
fun registerUser(@Body request: RequestBody): Call<ResponseBody>

@POST("/api/register")

@Body request: RequestBody

Call<ResponseBody>

val body = RequestBody.create(
    MediaType.parse("application/json"), gson.toJson(userDataRequest)
)

val body = RequestBody.create(
    MediaType.parse("application/json"), gson.toJson(userDataRequest)
)

apiService.registerUser(body).enqueue(object : Callback<ResponseBody> {
  override fun onFailure(call: Call<ResponseBody>, error: Throwable) {
    
  }

  override fun onResponse(call: Call<ResponseBody>, response: Response<ResponseBody>) {
  }
})

val body = RequestBody.create(
    MediaType.parse("application/json"), gson.toJson(userDataRequest)
)

apiService.registerUser(body).enqueue(object : Callback<ResponseBody> {
  override fun onFailure(call: Call<ResponseBody>, error: Throwable) {
    onUserCreated(null, error)
  }

  override fun onResponse(call: Call<ResponseBody>, response: Response<ResponseBody>) {
    val message = response.body()?.string()
    if (message == null) {
      onUserCreated(null, NullPointerException("No response body!"))
      return
    }

    onUserCreated(message, null)
  }
})

runOnUiThread{}