I am trying to display some pictures from the sd storage in GridView in a Xamarin.Android app.
The only documentation I've found is this: http://docs.xamarin.com/recipes/android/data/files/selecting_a_gallery_image
But it only works for one image, opening two or more pictures gives me an Java.Lang.OutOfMemoryError
on this row:
imageView.SetImageURI (bitmapList [position]);
Found some Android answers here on SO:
https://stackoverflow.com/a/823966/511299
Translated to C#:
public static Bitmap DecodeFile (String s)
{
try
{
s = s.Replace ("file://", "");
//Decode image size
BitmapFactory.Options o = new BitmapFactory.Options ();
o.InJustDecodeBounds = true;
BitmapFactory.DecodeStream (new System.IO.FileStream (s, System.IO.FileMode.Open), null, o);
//The new size we want to scale to
int REQUIRED_SIZE = 70;
//Find the correct scale value. It should be the power of 2.
int scale = 1;
while (o.OutWidth/scale/2>=REQUIRED_SIZE && o.OutHeight/scale/2>=REQUIRED_SIZE)
{
scale *= 2;
}
//Decode with inSampleSize
BitmapFactory.Options o2 = new BitmapFactory.Options ();
o2.InSampleSize = scale;
return BitmapFactory.DecodeStream (new System.IO.FileStream (s, System.IO.FileMode.Open), null, o2);
}
catch (FileNotFoundException e)
{
}
return null;
}
This gives me an
System.IO.IOException: Sharing violation on path storage/sdcard0/Pictures/MyAppPhotos/44cdbcf0-a488-40b8-98a9-79f3dc8d9deb.jpg
on the line of
return BitmapFactory.DecodeStream (new System.IO.FileStream (s, System.IO.FileMode.Open), null, o2);
Is it possible I access the file twice?
Or is it perhaps because I use FileStream instead of FileInputStream. Trying to use BitmapFactory.DecodeStream requires a System.IO.Stream as parameter, opposed to the example requiring a string :(
More detailed, here is the Android version of decodeStream:
public static Bitmap decodeStream (InputStream is, Rect outPadding, BitmapFactory.Options opts)
while this is all I can find for Xamarin.Android:
public static Bitmap DecodeStream (System.IO.Stream is, Rect outPadding, BitmapFactory.Options opts)
