//Zkratka pro vyvolání údalosti při chybě
private void CallError(string message)
{
State = States.Error;
operation.Post(new SendOrPostCallback(delegate(object state)
{
OnDownloadError?.Invoke(this, message);
}), null);
}
private void NetworkStateChanged(Object sender, ConnectivityChangedEventArgs e)
{
OnDownloadError.Invoke(this, e);
if (!_webClient.IsBusy && e.NetworkAccess == Xamarin.Essentials.NetworkAccess.Internet)
{
_webClient.DownloadFileAsync(new Uri(url), pathToNewFile);
}
}
/// <summary>
/// 根据解析出来的模型进行下载
/// </summary>
/// <param name="basicModel"></param>
/// <returns></returns>
public async Task <bool> DownloadAsync(BasicMusicInfoModel basicModel)
{
return(await Task.Run(async() =>
{
var obj = (QqMusicInfoModel)basicModel;
try
{
OnBeforeDownload?.Invoke($"{basicModel.SongName}_{basicModel.SingerName}");
var vkeyInfo = await GetVkeyInfo(obj.SongId, obj.MediaMid);
var url = new Uri(string.Format(_downloadUrl, obj.MediaMid, vkeyInfo.data.items[0].vkey));
var saveName = $"{obj.SongName}_{obj.SingerName}";
await _requests.SaveFileAsync(url, $"{saveName}.m4a");
OnAfterDownload?.Invoke($"{basicModel.SongName}_{basicModel.SingerName}");
return true;
}
catch (Exception e)
{
OnDownloadError?.Invoke(e, $"{basicModel.SongName}_{basicModel.SingerName}");
return false;
}
}));
}
private void OnError(ResultCode code)
{
OnDownloadError?.Invoke(code);
}