public static Android.Graphics.Bitmap rotateBitmap(Android.Graphics.Bitmap bitmap, int orientation)
{
Android.Graphics.Matrix matrix = new Android.Graphics.Matrix();
switch (orientation)
{
case (int)Android.Media.Orientation.Normal:
return(bitmap);
case (int)Android.Media.Orientation.FlipHorizontal:
matrix.SetScale(-1, 1);
break;
case (int)Android.Media.Orientation.Rotate180:
matrix.SetRotate(180);
break;
case (int)Android.Media.Orientation.FlipVertical:
matrix.SetRotate(180);
matrix.PostScale(-1, 1);
break;
case (int)Android.Media.Orientation.Transpose:
matrix.SetRotate(90);
matrix.PostScale(-1, 1);
break;
case (int)Android.Media.Orientation.Rotate90:
matrix.SetRotate(90);
break;
case (int)Android.Media.Orientation.Transverse:
matrix.SetRotate(-90);
matrix.PostScale(-1, 1);
break;
case (int)Android.Media.Orientation.Rotate270:
matrix.SetRotate(-90);
break;
default:
return(bitmap);
}
try
{
Android.Graphics.Bitmap bmRotated = Android.Graphics.Bitmap.CreateBitmap(bitmap, 0, 0, bitmap.Width, bitmap.Height, matrix, true);
bitmap.Recycle();
return(bmRotated);
}
catch (Java.Lang.OutOfMemoryError e)
{
e.PrintStackTrace();
return(null);
}
}
/// <summary>
/// Take a picture and perform previews
/// </summary>
/// <param name="data"></param>
/// <param name="camera"></param>
void Camera.IPictureCallback.OnPictureTaken(byte[] data, Android.Hardware.Camera camera)
{
if (data != null && _box != null)
{
if (!_processDialog.IsShowing) {
_processDialog.SetMessage ("Waiting for image results...");
_processDialog.Show ();
}
Android.Graphics.BitmapFactory.Options options = new Android.Graphics.BitmapFactory.Options ();
options.InJustDecodeBounds = true;
options.InSampleSize = 2;
options.InJustDecodeBounds = false;
options.InTempStorage = new byte[16 * 1024];
Android.Graphics.Bitmap bmp = Android.Graphics.BitmapFactory.DecodeByteArray(data, 0, data.Length, options);
data = null;
GC.Collect ();
Android.Graphics.Bitmap rotatedBitmap;
if (bmp.Width > bmp.Height)
{
Android.Graphics.Matrix mtx = new Android.Graphics.Matrix();
mtx.SetRotate(90);
rotatedBitmap = Android.Graphics.Bitmap.CreateBitmap(bmp, 0, 0, bmp.Width, bmp.Height, mtx, false);
bmp.Recycle();
mtx.Dispose();
mtx = null;
}
else
{
rotatedBitmap = bmp.Copy(bmp.GetConfig(), true);
bmp.Recycle();
}
GC.Collect ();
double ratioX = (double)rotatedBitmap.Width / (double)screenWidth;
double ratioY = (double)rotatedBitmap.Height / (double)screenHeight;
int startX = (int)(ratioX * (double)(_box.MidX - _box.Width / 2));
int startY = (int)(ratioY * (double)(_box.MidY - _box.Height / 2));
int width = (int)(ratioX * (double)_box.Width);
int height = (int)(ratioY * (double)_box.Height);
Android.Graphics.Bitmap croppedBitmap = Android.Graphics.Bitmap.CreateBitmap(rotatedBitmap, startX, startY, width, height);
rotatedBitmap.Recycle();
GC.Collect ();
bitmap = croppedBitmap.Copy(croppedBitmap.GetConfig(), true);
PerformPreviews(croppedBitmap);
}
else
{
Toast.MakeText(this, "Data null error", ToastLength.Long).Show();
}
}
