//private Task<FileData> TakeMediaAsync (string type, string action)
private Task <FileData> TakeMediaAsync(string[] allowedTypes, string action)
{
var id = GetRequestId();
var ntcs = new TaskCompletionSource <FileData> (id);
if (Interlocked.CompareExchange(ref _completionSource, ntcs, null) != null)
{
throw new InvalidOperationException("Only one operation can be active at a time");
}
try {
var pickerIntent = new Intent(this._context, typeof(FilePickerActivity));
pickerIntent.SetFlags(ActivityFlags.NewTask);
pickerIntent.PutExtra(nameof(allowedTypes), allowedTypes);
this._context.StartActivity(pickerIntent);
EventHandler <FilePickerEventArgs> handler = null;
EventHandler <EventArgs> cancelledHandler = null;
handler = (s, e) => {
var tcs = Interlocked.Exchange(ref _completionSource, null);
FilePickerActivity.FilePicked -= handler;
tcs?.SetResult(new FileData(e.FilePath, e.FileName,
() =>
{
if (IOUtil.isMediaStore(e.FilePath))
{
return(new System.IO.MemoryStream(e.FileByte));
}
else
{
return(System.IO.File.OpenRead(e.FilePath));
}
}));
};
cancelledHandler = (s, e) => {
var tcs = Interlocked.Exchange(ref _completionSource, null);
FilePickerActivity.FilePickCancelled -= cancelledHandler;
tcs?.SetResult(null);
};
FilePickerActivity.FilePickCancelled += cancelledHandler;
FilePickerActivity.FilePicked += handler;
} catch (Exception exAct) {
Debug.Write(exAct);
}
return(_completionSource.Task);
}
protected override void OnActivityResult(int requestCode, [GeneratedEnum] Result resultCode, Intent data)
{
base.OnActivityResult(requestCode, resultCode, data);
if (resultCode == Result.Canceled)
{
// Notify user file picking was cancelled.
OnFilePickCancelled();
Finish();
}
else
{
System.Diagnostics.Debug.Write(data.Data);
try {
var _uri = data.Data;
var filePath = IOUtil.getPath(context, _uri);
if (string.IsNullOrEmpty(filePath))
{
filePath = IOUtil.isMediaStore(_uri.Scheme) ? _uri.ToString() : _uri.Path;
}
byte[] file;
if (IOUtil.isMediaStore(_uri.Scheme))
{
file = IOUtil.readFile(context, _uri);
}
else
{
file = IOUtil.readFile(filePath);
}
var fileName = GetFileName(context, _uri);
OnFilePicked(new FilePickerEventArgs(file, fileName, filePath));
} catch (Exception readEx) {
System.Diagnostics.Debug.Write(readEx);
// Notify user file picking failed.
FilePickCancelled?.Invoke(
this,
new FilePickerCancelledEventArgs
{
Exception = readEx
});
} finally {
Finish();
}
}
}
//private Task<FileData> TakeMediaAsync (string type, string action)
private Task <FileData> TakeMediaAsync(string[] allowedTypes, string action)
{
if (this._context.PackageManager.CheckPermission(
Android.Manifest.Permission.ReadExternalStorage,
this._context.PackageName) == Android.Content.PM.Permission.Denied)
{
throw new InvalidOperationException("Android permission READ_EXTERNAL_STORAGE is missing or was denied by user");
}
var id = GetRequestId();
var ntcs = new TaskCompletionSource <FileData> (id);
if (Interlocked.CompareExchange(ref _completionSource, ntcs, null) != null)
{
throw new InvalidOperationException("Only one operation can be active at a time");
}
try {
var pickerIntent = new Intent(this._context, typeof(FilePickerActivity));
pickerIntent.SetFlags(ActivityFlags.NewTask);
pickerIntent.PutExtra(nameof(allowedTypes), allowedTypes);
this._context.StartActivity(pickerIntent);
EventHandler <FilePickerEventArgs> handler = null;
EventHandler <FilePickerCancelledEventArgs> cancelledHandler = null;
handler = (s, e) => {
var tcs = Interlocked.Exchange(ref _completionSource, null);
FilePickerActivity.FilePickCancelled -= cancelledHandler;
FilePickerActivity.FilePicked -= handler;
tcs?.SetResult(new FileData(e.FilePath, e.FileName,
() =>
{
if (IOUtil.isMediaStore(e.FilePath))
{
var contentUri = Android.Net.Uri.Parse(e.FilePath);
return(Application.Context.ContentResolver.OpenInputStream(contentUri));
}
else
{
return(System.IO.File.OpenRead(e.FilePath));
}
}));
};
cancelledHandler = (s, e) => {
var tcs = Interlocked.Exchange(ref _completionSource, null);
FilePickerActivity.FilePickCancelled -= cancelledHandler;
FilePickerActivity.FilePicked -= handler;
if (e?.Exception != null)
{
tcs?.SetException(e.Exception);
}
else
{
tcs?.SetResult(null);
}
};
FilePickerActivity.FilePickCancelled += cancelledHandler;
FilePickerActivity.FilePicked += handler;
} catch (Exception exAct) {
Debug.Write(exAct);
_completionSource.SetException(exAct);
}
return(_completionSource.Task);
}
