fun downloadAudio(url:String, fileExternal: File){
        viewState.showLoading()
            Observable.fromCallable {
                val array=url.split("/")
                var nameFile=array[array.size-1]
                nameFile=nameFile.substring(0,nameFile.indexOf("?"))
                val file= File(fileExternal, nameFile)
                val link=""
                Thread.sleep(4000)
                Pair(link, file)
            }
            .flatMap {
                Utils.downloadFile(it.first, it.second)
                        .observeOn(AndroidSchedulers.mainThread())
                        .doOnNext{ progress -> }
            }
            .doOnNext {
                Log.e("SearchAudioPresenter", "downloadAudio= ASD")
            }
            .subscribeOn(Schedulers.io())
            .observeOn(AndroidSchedulers.mainThread())
            .doFinally { viewState.hideLoading() }
            .subscribe({
                viewState.loadingSuccess()
            }, Throwable::printStackTrace).isDisposed
    }