public async void ExportBitmapAsJPG(Bitmap bitmap, int index)
{
string sdCardPath = Android.OS.Environment.ExternalStorageDirectory.AbsolutePath;
string name = "_" + index.ToString () + ".jpg";
string filePath = System.IO.Path.Combine(sdCardPath, name);
var stream = new System.IO.FileStream(filePath, System.IO.FileMode.Create);
await bitmap.CompressAsync (Bitmap.CompressFormat.Jpeg, 30, stream);
stream.Close ();
}
//Bitmap to byte[]
public static async Task <byte[]> AndroidBitmapToByteArray(Android.Graphics.Bitmap bitmap)
{
byte[] rotated;
using (var ms2 = new MemoryStream())
{
await bitmap.CompressAsync(CompressFormat.Jpeg, 50, ms2);//quality:0~100?
rotated = ms2.ToArray();
}
return(rotated);
}
public static async Task<bool> UploadPhoto(string listName, string imageName, Bitmap bitmap)
{
bool success = false;
try
{
string requestUrl = string.Format("{0}/_api/web/GetFolderByServerRelativeUrl('{1}')/Files/add(url='{2}',overwrite=true)", Constants.SHAREPOINT_URL + Constants.SHAREPOINT_SITE_PATH, listName, imageName);
HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(requestUrl);
request.Method = "POST";
request.Accept = "image/png, image/svg+xml, image/*;q=0.8, */*;q=0.5";
request.ContentType = "application/octet-stream";
request.Headers.Add("Authorization", "Bearer " + App.Token);
Stream requestStream = request.GetRequestStream();
MemoryStream outputStearm = new MemoryStream();
await bitmap.CompressAsync(Bitmap.CompressFormat.Jpeg, 100, outputStearm);
byte[] bytes = outputStearm.ToArray();
await requestStream.WriteAsync(bytes, 0, bytes.Length);
using (HttpWebResponse response = await request.GetResponseAsync() as HttpWebResponse)
{
if (response.StatusCode == HttpStatusCode.OK)
{
success = true;
}
}
}
catch (Exception)
{
success = false;
}
return success;
}
protected async void exportBitmapAsPNG(Bitmap bitmap, string path)
{
using (var stream = new FileStream(path, FileMode.Create))
{
await bitmap.CompressAsync(Bitmap.CompressFormat.Png, 100, stream);
}
}