我之前发过帖子,询问如何将.3gpp音频文件发送到解析云: Xamarin C# Android - converting .3gpp audio to bytes & sending to parseObject
我已成功完成此操作,在解析数据管理器上,我可以单击该文件的链接并成功播放从我的Android设备发送的声音。 以下是将数据上传到云端的代码:
async Task sendToCloud(string filename)
{
ParseClient.Initialize ("Censored Key", "Censored Key");
string LoadPath = System.Environment.GetFolderPath(System.Environment.SpecialFolder.ApplicationData);
string savetheFile = sName + ".3gpp";
string tempUserName;
LoadPath += savetheFile;
Console.WriteLine ("loadPath: " + LoadPath);
try
{
byte[] data = File.ReadAllBytes(LoadPath);
ParseFile file = new ParseFile(savetheFile, data);
await file.SaveAsync();
var auidoParseObject = new ParseObject("AudioWithData");
//Console.WriteLine(ParseUser.getUserName());
if (ParseUser.CurrentUser != null)
{
tempUserName = ParseUser.CurrentUser.Username.ToString();
}
else{
tempUserName = "Anonymous";
}
//tempUserName = ParseUser.CurrentUser.Username.ToString();
Console.WriteLine("PARSE USERNAME: " + tempUserName);
auidoParseObject["userName"] = tempUserName;
auidoParseObject["userName"] = tempUserName;
auidoParseObject["file"] = file;
await auidoParseObject.SaveAsync();
}
catch (Exception e)
{
Console.WriteLine("Failed to await audio object! {0}" + e);
}
}
正如您所看到的,我发送了一个名为" AudioWithData"的ParseObject。 该对象包含两个子节点: - 上传文件的用户的用户名(字符串) -the parseFile调用" file" (有以下两个孩子) --- SaveTheFile(包含音频文件名称的字符串,由用户输入,最后添加.3gpp扩展名,例如" myAudioFile.3gpp" ---数据(包含音频文件的字节)
我需要能够将文件下载到我的Android设备上,然后通过媒体播放器对象播放。
我已经检查了解析网站上的文档,但我还没设法做到这一点: (请原谅我的伪查询语法) SELECT(音频文件)FROM(parseObject)WHERE(用户名=当前用户) 然后,我最终希望将所有这些文件放入列表视图中,当用户单击该文件时,它会播放音频。
我尝试过以下但我真的不知道自己在做什么......
async Task RetrieveSound(string filename)
{
ParseClient.Initialize ("Censored key", "Censored key");
Console.WriteLine ("Hit RetrieveSound, filename = " + filename);
string username;
var auidoParseObject = new ParseObject("AudioWithData");
if (ParseUser.CurrentUser != null) {
username = ParseUser.CurrentUser.Username.ToString ();
} else {
username = "Anonymous";
}
string cloudFileName;
Console.WriteLine ("username set to: " + username);
var HoldThefile = auidoParseObject.Get<ParseFile>("audio");
//fgher
var query = from audioParseObject in ParseObject.GetQuery("userName")
where audioParseObject.Get<String>("userName") == username
select file;
IEnumerable<ParseFile> results = await query.FindAsync();
Console.WriteLine ("passed the query");
//wfojh
byte[] data = await new HttpClient().GetByteArrayAsync(results.Url);
Console.WriteLine ("putting in player...");
_player.SetDataSourceAsync (data);
_player.Prepare;
_player.Start ();
}
任何帮助都会非常受欢迎!即使是正确方向的一点也会很棒! 谢谢!
编辑 -
我实际上在以下行中收到了查询错误 (由于我的声誉,我无法发布图片 - 我无法访问我的主stackOverflow帐户:/) 这里链接图像:
第一个错误:http://i.stack.imgur.com/PZBJr.png 第二个错误:http://i.stack.imgur.com/UkHvX.png 有任何想法吗?解析文档对此很模糊。
答案 0 :(得分:0)
此行将返回结果集合
IEnumerable<ParseFile> results = await query.FindAsync();
您需要使用foreach
进行迭代,或者只选择第一个
// for testing, just pick the first one
if (results.Count > 0) {
var result = results[0];
byte[] data = await new HttpClient().GetByteArrayAsync(result.Url);
File.WriteAllBytes(some_path_to_a_temp_file, data);
// at this point, you can just initialize your player with the audio file path and play as normal
}