create image file from byte array in documents Xamarin Android

Question

Could anyone help me about how to create image file from byte array in documents Xamarin Android and get the new path for the image please ?

Here my code :

Stream stream = ContentResolver.OpenInputStream(data.Data);
Bitmap bitmap = BitmapFactory.DecodeStream(stream);
MemoryStream memStream = new MemoryStream();
bitmap.Compress(Bitmap.CompressFormat.Jpeg, 50, memStream);
byte[] picData;
picData = memStream.ToArray();

now picData is byte array, and I need to create a Jpeg file in doucments and get the new path .. Thanks advance.

SushiHangover · Accepted Answer · 2017-05-10 18:36:30Z

2

You can bypass using a MemoryStream and decode/compress an Android Bitmap directly to a FileStream to save resources (memory and processing time):

var bitmap = BitmapFactory.BitmapFactory.DecodeStream(stream);
var path = Path.Combine(GetExternalFilesDir(Environment.DirectoryDocuments).AbsolutePath, "sameImagePath.jpg");
if (!File.Exists(path))
{
    using (var filestream = new FileStream(path, FileMode.Create))
    {
        if (bitmap.Compress(Bitmap.CompressFormat.Jpeg, 50, filestream))
        {
            filestream.Flush();
        }
        else {} // handle failure case...
    }
}
bitmap.Recycle();
bitmap.Dispose();

edited May 10, 2017 at 18:36

answered May 10, 2017 at 18:29

SushiHangover

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2 Comments

XamaX Over a year ago

Thanks but I tried your code and nothing happend. any help please. I need create a new image from byte array in documents folder xamarin android

SushiHangover Over a year ago

@XamaX Which Document directory are you looking in? My sample would save it to the app's documents (i.e. /storage/emulated/0/Android/data/your.app.packagenamehere/files/Documents/sameImagePath.jpg) If you need a different directory update the path accordingly.

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