private async void TakePhotoButton_Clicked(object sender, EventArgs e)
{
const string defaultFileName = "New Photo.jpg";
var media = App.PresentationFactory.CreateMedia(App.CurrentPermissions);
var filePicker = App.PresentationFactory.CreateFilePicker();
var isCameraAvailable = await media.GetIsCameraAvailable();
if (!isCameraAvailable || !media.IsTakePhotoSupported)
{
await DisplayAlert("No Camera", ":( No camera available.", "OK");
return;
}
using (var mediaFile = await media.TakePhotoAsync(new StoreCameraMediaOptions
{
PhotoSize = PhotoSize.Medium,
Directory = "Adapt Sample App",
Name = defaultFileName
}))
{
if (mediaFile == null)
{
return;
}
using (var readFileStream = mediaFile.GetStream())
{
FileSelectionDictionary fileTypes = new FileSelectionDictionary {
{ "Jpeg Image", new List <string> {
".jpg"
} }
};
using (var fileData = await filePicker.PickAndOpenFileForWriting(fileTypes, defaultFileName))
{
if (fileData == null)
{
return;
}
var readBuffer = new byte[readFileStream.Length];
await readFileStream.ReadAsync(readBuffer, 0, (int)readFileStream.Length);
fileData.FileStream.Write(readBuffer, 0, readBuffer.Length);
}
}
}
}
#pragma warning disable CS1998 // Async method lacks 'await' operators and will run synchronously
public async Task <FileData> PickAndOpenFileForWriting(FileSelectionDictionary fileTypes, string fileName)
#pragma warning restore CS1998 // Async method lacks 'await' operators and will run synchronously
{
var documents = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments);
var filePath = Path.Combine(documents, fileName);
var fileStream = File.Create(filePath);
var retVal = new FileData
{
FileName = fileName,
FileStream = fileStream
};
return(retVal);
}
public async Task <FileData> PickAndOpenFileForWriting(FileSelectionDictionary fileTypes, string fileName)
{
var directory = Path.Combine(Android.OS.Environment.ExternalStorageDirectory.AbsolutePath, Android.OS.Environment.DirectoryDownloads);
var filePath = Path.Combine(directory, fileName);
var retVal = new FileData {
FileName = fileName
};
if (File.Exists(filePath))
{
File.Delete(filePath);
}
retVal.FileStream = File.Create(filePath);
return(retVal);
}
public async Task <FileData> PickAndOpenFileForWriting(FileSelectionDictionary fileTypes, string fileName)
{
if (fileTypes == null)
{
throw new ArgumentNullException(nameof(fileTypes));
}
if (fileTypes.Count == 0)
{
throw new Exception("At least one file type must be specified");
}
var picker = new FileSavePicker();
if (fileName != null)
{
picker.SuggestedFileName = fileName;
}
foreach (var key in fileTypes.Keys)
{
picker.FileTypeChoices.Add(key, fileTypes[key]);
}
var file = await picker.PickSaveFileAsync();
if (file == null)
{
return(null);
}
var fileStream = await file.OpenStreamForWriteAsync();
var retVal = new FileData
{
FileName = file.Name,
FileStream = fileStream
};
return(retVal);
}
