使用 RxJava 的 ViewModel

ViewModel.kt

fun getToken(): Observable<Token> { ...... }

fun verify(userName): Observable<Boolean> {
    return getToken()
            .flatMap { token ->
                ......
            }
}

fun requestAndSaveUserData(userName: String): Observable<Result> {
    return verify(userName)
            .flatMap { ...... }
}

fun login(userName: String) {
    requestAndSaveUser(userName)
        .subscribeOn(Schedulers.io())
        .observerOn(AndroidSchedulers.mainThread())
        .subscribe({
            showLoginSuccess(it)
        }, {
            it.printStackTrace()
        })
}