RxAndroidのObservableを使った非同期処理を簡略にするメモ(Kotlin) ref: http://qiita.com/kenichi_odo/items/5b21495b03bd20e3224a

file0.txt

class Thread<Type_> {
  fun run(Background_: ((Type_?) -> Any) -> Any, Main_: (Type_?, Throwable?) -> Unit) {
    var result: Type_? = null
    var err: Throwable? = null
    Observable
        .create<Type_> { subscriber_ ->
          Background_ { value_ ->
            subscriber_.onNext(value_)
            subscriber_.onCompleted()
          }
        }
        .subscribeOn(Schedulers.newThread())
        .observeOn(AndroidSchedulers.mainThread())
        .subscribe({ result_ ->
          result = result_
        }, { err_: Throwable ->
          err = err_
        }, {
          Main_(result, err)
        })
  }
}

file1.txt

Thread<String>().run(
    Background_ = { Callback_ ->
      val result = "" // 重い処理
      Callback_(result)
    },
    Main_ = { result_, error_ ->
      when (error_) {
        null -> {
          hoge(result_) // 結果受け取り
        }
        else -> {
          // エラー処理
        }
      }
    }
)