图像捕获，保存文件... Android / Parse

I am attempting to save an image file captured from the mobile to Parse, within an Android app. I am using final File mediaFile. I think my problem is, I know I need to convert the file to a byte array...I've tried various ways to do this. I can see the image in a preview...but I can't seem to save it to Parse.I am attempting to save an image file captured