private async Task <string> DownloadFile(string url)
{
string path = string.Empty;
try
{
var fileName = GetFileName(url);
path = System.IO.Path.Combine(Path, fileName);
int totalBytes = GetFileSize(url);
using (var fileUrl = new Java.Net.URL(url))
{
using (var stream = fileUrl.OpenStream())
{
byte[] bytes = new byte[totalBytes];
int numBytesToRead = totalBytes;
int numBytesRead = 0;
while (numBytesToRead > 0)
{
// Read may return anything from 0 to numBytesToRead.
int n = await stream.ReadAsync(bytes, numBytesRead, numBytesToRead);
// Break when the end of the file is reached.
if (n == 0)
{
//await Task.Yield();
break;
}
numBytesRead += n;
numBytesToRead -= n;
float percentage = (float)numBytesRead / (float)totalBytes;
var message = new DownloadProgressMessage()
{
Percentage = percentage
};
MessagingCenter.Send <DownloadProgressMessage>(message, "DownloadProgressMessage");
}
File.WriteAllBytes(path, bytes);
}
}
}
catch (Exception ex)
{
Log.WriteLine(LogPriority.Error, "GetImageFromBitmap Error", ex.Message);
}
return(path);
}
public override void DidWriteData(NSUrlSession session, NSUrlSessionDownloadTask downloadTask, long bytesWritten, long totalBytesWritten, long totalBytesExpectedToWrite)
{
float percentage = (float)totalBytesWritten / (float)totalBytesExpectedToWrite;
var message = new DownloadProgressMessage()
{
BytesWritten = bytesWritten,
TotalBytesExpectedToWrite = totalBytesExpectedToWrite,
TotalBytesWritten = totalBytesWritten,
Percentage = percentage
};
MessagingCenter.Send <DownloadProgressMessage> (message, "DownloadProgressMessage");
}
