如何从Google Play商店获取最新的android应用版本？以前使用以下代码来做到这一点
using (var webClient = new System.Net.WebClient())
{
var searchString = "itemprop=\"softwareVersion\">";
var endString = "</";
//possible network error if phone gets disconnected
string jsonString = webClient.DownloadString(PlayStoreUrl);
var pos = jsonString.IndexOf(searchString, StringComparison.InvariantCultureIgnoreCase) + searchString.Length;
var endPos = jsonString.IndexOf(endString, pos, StringComparison.Ordinal);
appStoreversion = Convert.ToDouble(jsonString.Substring(pos, endPos - pos).Trim());
System.Diagnostics.Debug.WriteLine($"{currentVersion} :: {appStoreversion}");
System.Diagnostics.Debug.WriteLine($"{appStoreversion > currentVersion}");
if ((appStoreversion.ToString() != currentVersion.ToString() && (appStoreversion > currentVersion)))
{
IsUpdateRequired = true;
}
}
var document =
Jsoup.Connect("https://play.google.com/store/apps/details?id=" + "com.spp.in.spp" + "&hl=en")
.Timeout(30000)
.UserAgent("Mozilla/5.0 (Windows; U; WindowsNT 5.1; en-US; rv1.8.1.6) Gecko/20070725 Firefox/2.0.0.6")
.Referrer("http://www.google.com")
.Get();
受孕：
Android. OS.NetworkOnMainThreadException：抛出了“Android.OS.NetworkOnMainThreadException”类型的异常。在System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw（）
但是现在Play商店似乎改变了一些条件，所以现有的功能被打破了。这里已经有一些类似的线程可用，但是这些线程似乎已经过时了。
这将返回基于字符串的版本，至少在Google再次更改html页面内容之前。
var version = await Task.Run(async () =>
{
var uri = new Uri($"https://play.google.com/store/apps/details?id={PackageName}&hl=en");
using (var client = new HttpClient())
using (var request = new HttpRequestMessage(HttpMethod.Get, uri))
{
request.Headers.TryAddWithoutValidation("Accept", "text/html");
request.Headers.TryAddWithoutValidation("User-Agent", "Mozilla/5.0 (Windows NT 6.2; WOW64; rv:19.0) Gecko/20100101 Firefox/19.0");
request.Headers.TryAddWithoutValidation("Accept-Charset", "ISO-8859-1");
using (var response = await client.SendAsync(request).ConfigureAwait(false))
{
try
{
response.EnsureSuccessStatusCode();
var responseHTML = await response.Content.ReadAsStringAsync().ConfigureAwait(false);
var rx = new Regex(@"(?<=""htlgb"">)(\d{1,3}\.\d{1,3}\.{0,1}\d{0,3})(?=<\/span>)", RegexOptions.Compiled);
MatchCollection matches = rx.Matches(responseHTML);
return matches.Count > 0 ? matches[0].Value : "Unknown";
}
catch
{
return "Error";
}
}
}
}
);
Console.WriteLine(version);
根据此链接，当应用程序尝试在其主线程上执行网络操作时，会引发此异常。您可以参考此线程，其中指出Android上的网络操作需要在UI主线程之外执行。最简单的方法是使用Task将其推送到默认线程池中的线程上。
