//Method to save document as a file in Android and view the saved document
public async Task SaveAndView(string fileName, String contentType, MemoryStream stream)
{
string root = null;
if (ContextCompat.CheckSelfPermission(Forms.Context, Manifest.Permission.WriteExternalStorage) != Permission.Granted)
{
ActivityCompat.RequestPermissions((Android.App.Activity)Forms.Context, new String[] { Manifest.Permission.WriteExternalStorage }, 1);
}
//Get the root path in android device.
if (Android.OS.Environment.IsExternalStorageEmulated)
{
root = Android.OS.Environment.ExternalStorageDirectory.ToString();
}
else
{
root = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments);
}
//Create directory and file
Java.IO.File myDir = new Java.IO.File(root + "/Syncfusion");
myDir.Mkdir();
Java.IO.File file = new Java.IO.File(myDir, fileName);
//Remove if the file exists
if (file.Exists())
{
file.Delete();
}
//Write the stream into the file
FileOutputStream outs = new FileOutputStream(file);
outs.Write(stream.ToArray());
outs.Flush();
outs.Close();
//Invoke the created file for viewing
if (file.Exists())
{
string extension = Android.Webkit.MimeTypeMap.GetFileExtensionFromUrl(Android.Net.Uri.FromFile(file).ToString());
string mimeType = Android.Webkit.MimeTypeMap.Singleton.GetMimeTypeFromExtension(extension);
Intent intent = new Intent(Intent.ActionView);
intent.SetFlags(ActivityFlags.ClearTop | ActivityFlags.NewTask);
Android.Net.Uri path = FileProvider.GetUriForFile(Forms.Context, Android.App.Application.Context.PackageName + ".fileprovider", file);
intent.SetDataAndType(path, mimeType);
intent.AddFlags(ActivityFlags.GrantReadUriPermission);
Forms.Context.StartActivity(Intent.CreateChooser(intent, "Choose App"));
}
}
public async Task <string> ConvertHtmlToPDF(string html, string fileName)
{
var dir = new Java.IO.File(Android.OS.Environment.ExternalStorageDirectory.AbsolutePath + "/Download/");
var file = new Java.IO.File(dir + "/" + fileName + ".pdf");
if (!dir.Exists())
{
dir.Mkdirs();
}
int x = 0;
while (file.Exists())
{
x++;
file = new Java.IO.File(dir + "/" + fileName + "(" + x + ")" + ".pdf");
}
var webpage = new Android.Webkit.WebView(MainActivity.Instance);
//var windowManager = MainActivity.Instance.GetSystemService(Android.Content.Context.WindowService);
//DisplayMetrics outMetrics = new DisplayMetrics();
//windowManager.DefaultDisplay.GetMetrics(outMetrics);
//int widthPixels = outMetrics.WidthPixels;
//int heightPixels = outMetrics.HeightPixels;
//int width = widthPixels;
//int height = heightPixels;
int width = 2102;
int height = 2937;
webpage.Layout(0, 0, width, height);
var client = new WebViewCallBack(file.ToString());
var tokenSource = new CancellationTokenSource();
var task = Task.Run(() =>
{
if (tokenSource.Token.IsCancellationRequested)
{
return;
}
while (true)
{
if (tokenSource.Token.IsCancellationRequested)
{
break;
}
}
}, tokenSource.Token);
client.OnPageLoadFinished += (s, e) =>
{
tokenSource.Cancel();
};
webpage.SetWebViewClient(client);
webpage.LoadDataWithBaseURL("", html, "text/html", "UTF-8", null);
await task;
return(file.ToString());
}
public async void PutKeysButtonOnClick()
{
File directory;
// Shared key list file, Please configure according to the actual situation
if (Android.OS.Environment.ExternalStorageState == "mounted")
{
//create new file directory object
directory = FilesDir;
if (directory.Exists())
{
Toast.MakeText(this, "File exist.", ToastLength.Short).Show();
}
string fileName = directory.ToString() + "/putkeysfile.zip";
File file = new Java.IO.File(fileName);
if (!file.Exists())
{
file.CreateNewFile();
}
else
{
List <File> putList = new List <File>();
putList.Add(file);
DiagnosisConfiguration diagnosisConfiguration = new DiagnosisConfiguration.Builder().Build();
PendingIntent pendingIntent = PendingIntent.GetService(this, 0, new Intent(this, typeof(BackgroundContactCheckingIntentService)), PendingIntentFlags.UpdateCurrent);
//Put shared key files to diagnosisconfiguration.
var resultPutSharedKeys = mEngine.PutSharedKeyFilesAsync(pendingIntent, putList, diagnosisConfiguration, token);
await resultPutSharedKeys;
if (resultPutSharedKeys.Status.Equals(System.Threading.Tasks.TaskStatus.RanToCompletion))
{
Log.Debug(TAG, "PutSharedKeyFiles succeeded.");
}
}
}
}
private static async Task <Java.IO.File> SavePhotoToDiskAsync(byte[] data, string directory)
{
Java.IO.File pictureFile;
string photoFileName;
using (var pictureFileDir = new Java.IO.File(directory))
{
if (!pictureFileDir.Exists() && !pictureFileDir.Mkdirs())
{
_logger.LogError("Can't create directory to save image");
return(null);
}
photoFileName = $"Picture-{Guid.NewGuid().ToString()}.jpg";
var imageFilePath = $"{pictureFileDir.Path}{Java.IO.File.Separator}{photoFileName}";
pictureFile = new Java.IO.File(imageFilePath);
}
FileOutputStream fileOutputStream = null;
try
{
fileOutputStream = new FileOutputStream(pictureFile);
await fileOutputStream.WriteAsync(data);
}
catch (Exception e)
{
_logger.LogError($"File {photoFileName} has not been saved: {e.Message}", e);
}
finally
{
fileOutputStream?.Close();
fileOutputStream?.Dispose();
}
return(pictureFile);
}