Я знаю, что это довольно старый вопрос, но я отвечу на него своим кодом, который я использовал.По моему опыту, возиться с этим не все устройства могут использовать стандартные намерения и возвращать данные обратно в OnActivityResult
.
private void TakePicture()
{
if (PackageManager.HasSystemFeature(PackageManager.FeatureCamera))
{
var intent = new Intent(Android.Provider.MediaStore.ActionImageCapture);
var file = new File(Android.OS.Environment.GetExternalStoragePublicDirectory(Android.OS.Environment.DirectoryPictures), "PictureTHIS");
if (!file.Exists())
{
if (!file.Mkdirs())
{
Log.Debug(Constants.LOG_TAG, "Unable to create directory to save photos.");
return;
}
}
_file = new File(file.Path + File.Separator + "IMG_" + DateTime.Now.ToString("yyyyMMdd_HHmmss") + ".jpg");
intent.PutExtra(MediaStore.ExtraOutput, Uri.FromFile(_file));
StartActivityForResult(intent, Constants.CAMERA_ACTIVITY);
}
else
{
Toast.MakeText(this, "This device does not have a camera, please select an image from another option.", ToastLength.Short).Show();
}
}
Я использовал это как справку о том, как обращаться с некоторыми из устройств, которые не возвращали намерение.http://kevinpotgieter.wordpress.com/2011/03/30/null-intent-passed-back-on-samsung-galaxy-tab/
protected override void OnActivityResult(int requestCode, Result resultCode, Intent data)
{
base.OnActivityResult(requestCode, resultCode, data);
if (resultCode == Result.Ok)
{
//checking for camera acitivy, my app allows both gallery and camera for retrieving pictures.
if (requestCode == Constants.CAMERA_ACTIVITY)
{
//some devices do not pass back an intent so your data could be null
if (data != null && !string.IsNullOrEmpty(data.DataString))
{
//full uri to where the image is on the device.
Android.Net.Uri.Parse(data.DataString);
}
else
{
//issue where some devices don't pass back correct data from the intent.
var uris = GetImagePathFromCamera();
if (uris == null)
{
//had an issue with some devices with no sd card, so i create the file and store it on the device
var orientation = 0;
var date = string.Empty;
//_file is a java.io.file that is passed in the intent with get extra specified.
try
{
var exif = new ExifInterface(_file.Path);
orientation = exif.GetAttributeInt(ExifInterface.TagOrientation, -1);
date = exif.GetAttribute(ExifInterface.TagDatetime);
}
catch { }
switch (orientation)
{
case 6:
Helpers.Orientation = 90;
break;
case 3:
Helpers.Orientation = 180;
break;
case 8:
Helpers.Orientation = 270;
break;
default:
Helpers.Orientation = 0;
break;
}
ContentValues values = new ContentValues();
values.Put(Android.Provider.MediaStore.Images.Media.InterfaceConsts.DisplayName, _file.Name);
values.Put(Android.Provider.MediaStore.Images.Media.InterfaceConsts.DateTaken, date);
values.Put(Android.Provider.MediaStore.Images.Media.InterfaceConsts.MimeType, "image/jpeg");
values.Put(Android.Provider.MediaStore.Images.Media.InterfaceConsts.Orientation, Helpers.Orientation);
values.Put(Android.Provider.MediaStore.Images.Media.InterfaceConsts.Data, _file.Path);
var uri = ContentResolver.Insert(Android.Provider.MediaStore.Images.Media.ExternalContentUri, values);
//uri returned is the path to the image on the device
}
else
{
//uris is a list of uri's specifying the image taken and its thumbnail
}
};
}
}
else
{
//notify user the camera was cancelled if you want
}
}