private void ExportScanData()
{
if (ContextCompat.CheckSelfPermission(this, Manifest.Permission.WriteExternalStorage) == (int)Permission.Granted ||
ContextCompat.CheckSelfPermission(this, Manifest.Permission.ReadExternalStorage) == (int)Permission.Granted)
{
List <ParcelScans> parcelScans = databaseConnection.Query <ScanSKUDataBase.ParcelScans>("SELECT * FROM ParcelScans");
string fileName = DateTime.Now.ToString("yyyy-MM-ddTHH:mm:ss") + ".csv";
// Set a variable to the Documents path.
string docPath = Path.Combine(Android.OS.Environment.ExternalStorageDirectory.AbsolutePath, Android.OS.Environment.DirectoryDownloads);
string filepath = (Path.Combine(docPath, fileName));
using (StreamWriter outputFile = new StreamWriter(filepath))
{
foreach (ParcelScans parcelScan in parcelScans)
{
outputFile.WriteLine(parcelScan.ToCSV());
}
}
// Notify the user about the completed "download"
DownloadManager downloadManager = DownloadManager.FromContext(Android.App.Application.Context);
downloadManager.AddCompletedDownload(fileName, "Barcode Scan Data Export", true, "application/txt", filepath, File.ReadAllBytes(filepath).Length, true);
}
else
{
ActivityCompat.RequestPermissions(this, new string[] { Manifest.Permission.WriteExternalStorage, Manifest.Permission.ReadExternalStorage }, 2);
}
}
public void FileReceivedDelegate(string fileName, string fileDescription, string filePath, int fileSize, TextView associatedTextView)
{
MimeTypeMap mime = MimeTypeMap.Singleton;
string ext = fileName.ToLower();
string extension = MimeTypeMap.GetFileExtensionFromUrl(ext);
string type = null;
if (extension != null)
{
type = MimeTypeMap.Singleton.GetMimeTypeFromExtension(extension);
}
if (type == null)
{
type = "application/octet-stream";
}
DownloadManager downloadManager = DownloadManager.FromContext(Android.App.Application.Context);
downloadManager.AddCompletedDownload(fileName, fileDescription, true, type, filePath, fileSize, true);
CommClientAndroid client2 = ClientHolder.Client;
client2.RemoveFile(associatedTextView.Text);
ViewGroup parent = (ViewGroup)associatedTextView.Parent;
parent.Post(delegate
{
parent.RemoveView(associatedTextView);
});
client.currentlyDownloadingFile = false;
}
public void MakeDownloadFolder(string fullFileName, string mimeType)
{
var filePath = fullFileName;
var fileName = Path.GetFileName(fullFileName);
Java.IO.File file = new Java.IO.File(fullFileName);
var context = Android.App.Application.Context;
DownloadManager downloadManager = (DownloadManager)context.GetSystemService(Context.DownloadService);
downloadManager.AddCompletedDownload(fileName, fileName, true, mimeType, fullFileName, file.Length(), true);
}
/// <summary>
/// This will not be used in iOS
/// </summary>
/// <param name="fileDir">File directory</param>
/// <param name="fileName">File name</param>
/// <param name="fileDescription">Description to be used to add to the download manager</param>
/// <returns>status - true: worked; false: failure</returns>
public bool SetDownload(string fileDir, string fileName, string fileDescription)
{
bool permissionGranted = false;
const string mimeUriFile = "file://";
const string excelMimeType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
Version version = DeviceInfo.Version;
// This should not be used at or after version 8 (API 26)
if (version.Major >= 8)
{
return(true);
}
try
{
var context = Android.App.Application.Context;
permissionGranted = true;
string fileSpec = Path.Combine(fileDir, fileName);
FileInfo fileInfo = new FileInfo(fileSpec);
if (fileInfo.Exists)
{
// Notify the user about the completed "download"
DownloadManager downloadManager = DownloadManager.FromContext(context);
// https://www.sandersdenardi.com/using-the-android-downloadmanager/
// https://docs.microsoft.com/en-us/dotnet/api/android.app.downloadmanager.invokequery?view=xamarin-android-sdk-9#Android_App_DownloadManager_InvokeQuery_Android_App_DownloadManager_Query_
// have we already added the file to the download manager?
DownloadManager.Query query = new DownloadManager.Query();
query.SetFilterByStatus(DownloadStatus.Pending | // <- note bitwise OR
DownloadStatus.Running |
DownloadStatus.Successful);
ICursor cursor = downloadManager.InvokeQuery(query);
int colDescrption = cursor.GetColumnIndex(DownloadManager.ColumnDescription);
int colDirectory = cursor.GetColumnIndex(DownloadManager.ColumnLocalUri);
int colMimeType = cursor.GetColumnIndex(DownloadManager.ColumnMediaType);
int colFileName = cursor.GetColumnIndex(DownloadManager.ColumnTitle);
bool exactMatchFile = false;
bool exactMatchDir = false;
bool exactMatchDesc = false;
for (cursor.MoveToFirst(); !cursor.IsAfterLast; cursor.MoveToNext())
{
string dmFileName = cursor.GetString(colFileName);
if (string.IsNullOrEmpty(dmFileName))
{
dmFileName = string.Empty;
}
if (dmFileName.Equals(fileName))
{
exactMatchFile = true;
}
string dmDesc = cursor.GetString(colDescrption);
if (string.IsNullOrEmpty(dmDesc))
{
dmDesc = string.Empty;
}
if (dmDesc.Equals(fileDescription))
{
exactMatchDesc = true;
}
string dmMimeType = cursor.GetString(colMimeType);
if (string.IsNullOrEmpty(dmMimeType))
{
dmMimeType = string.Empty;
}
string dmDirectory = cursor.GetString(colDirectory);
if (string.IsNullOrEmpty(dmDirectory))
{
dmDirectory = string.Empty;
}
else
{
int i = dmDirectory.IndexOf(mimeUriFile, StringComparison.Ordinal);
if (i >= 0)
{
dmDirectory = dmDirectory.Substring(mimeUriFile.Length);
}
}
if (dmDirectory.Equals(fileDir))
{
exactMatchDir = true;
}
if (exactMatchFile && exactMatchDir && exactMatchDesc)
{
break;
}
}
cursor.Close();
query = null;
if (!(exactMatchFile && exactMatchDir && exactMatchDesc))
{
downloadManager.AddCompletedDownload(fileInfo.Name, fileDescription, true, excelMimeType,
fileInfo.DirectoryName, fileInfo.Length, true);
}
}
return(true);
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine("SetDownload() filespec: " + fileDir +
" desc: " + fileDescription + " permission granted " + permissionGranted +
" - exception: " + ex.Message);
System.Diagnostics.Debug.Flush();
}
return(false);
}