如何使用 retrofit 和 kotlin Coroutines 发送 get 请求的参数？

Question

我正在学习来自 https://proandroiddev.com/suspend-what-youre-doing-retrofit-has-now-coroutines-support-c65bd09ba067。我很难理解如何发送参数以从 MainActivity

获取请求

Webservice.kt

interface Webservice {
@GET("/todos/{id}")
suspend fun getTodo(@Path(value = "id") todoId: Int): Todo
}

TodoRepository.kt

class TodoRepository {
var client: Webservice = RetrofitClient.webservice
suspend fun getTodo(id: Int) = client.getTodo(id)
}

MainViewModel.kt

class MainViewModel : ViewModel() {
val repository: TodoRepository = TodoRepository()

val firstTodo = liveData(Dispatchers.IO) {
    val retrivedTodo = repository.getTodo(1)

    emit(retrivedTodo)
    }
}

MainAcitvity.kt

class MainActivity : AppCompatActivity() {

lateinit var viewModel: MainViewModel

override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    setContentView(R.layout.activity_main)

    viewModel = ViewModelProviders.of(this).get(MainViewModel::class.java)

    showFirstTodo()
}

private fun showFirstTodo() {
    viewModel.getFirstTodo().observe(this, Observer {
        titleTextView.text = it.title
    })
}
}

Answer 1

GET请求中的Path和Query有区别。
您可以像这样轻松传递查询字符串：

interface Webservice {

    @GET("/todos/{id}")
    suspend fun getTodo(@Path(value = "id") todoId: Int, @Query("name") name: String?): Todo
    }

Answer 2

您可以像这样更改您的 viewModel 代码

 private val _todo = MutableLiveData<Todo>()
 val todo : LiveData<Todo> get() =_todo

 //Call this method from activity
 fun getTodo(arg : Int)
 {
  val result = //Call Coroutines here
  _todo.postValue(result)
 }

如何使用 retrofit 和 kotlin Coroutines 发送 get 请求的参数？

How to send parameters for get request using retrofit and kotlin Coroutines.?

android

kotlin

retrofit2

kotlin-coroutines