我一直在关注本教程 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
})
}
}
答案 0 :(得分:0)
Path
请求中的Query
和GET
之间存在差异。
您可以轻松地传递查询字符串,如下所示:
界面Web服务{
@GET("/todos/{id}")
suspend fun getTodo(@Path(value = "id") todoId: Int, @Query("name") name: String?): Todo
}
答案 1 :(得分:0)
您可以像这样更改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)
}