Is it the right way to save image as bytes?

I am converting my image files as bytes and insert into database using content value as given below.I need to store the image as bytes into the blog database field

  String fileName="/sdcard/"+pkDelivery+".png";  
         Bitmap bMap = BitmapFactory.decodeFile(fileName);
         imgSignature.setImageBitmap(bMap);




         ByteArrayOutputStream stream = new ByteArrayOutputStream();      
         bMap.compress(Bitmap.CompressFormat.PNG, 100, stream);      
         byte[] byteArray = stream.toByteArray();  
         String aa =byteArray.toString();
         ContentValues initialDelay15 = new ContentValues();
         dbAdapter = new DatabaseAdapter(this); 
         dbAdapter.open();
         initialDelay15.put("Signature",
                 byteArray);
         dbAdapter.UpdateRecord("tblDelivery", initialDelay15, "PKDelivery"
                 + "=" + pkDelivery, null); 

The byte array shows value as given below when tried to covert the image to bytes as given below

 [-119, 80, 78, 71, 13, 10, 26, 10, 0, 0, 0, 13, 73, 72, 68, 82, 0, 0, 1, -62, 0, 0, 0, -106, 8, 6, 0, 0, 0, 77, 112, -120, 16, 0, 0, 0, 4, 115, 66, 73, 84, 8, 8, 8, 8, 124, 8, 100, -120, 0, 0, 9, 80, 73, 68, 65, 84, 120, -100, -19, -35, 65, 110, -36, -42, 25, 7, -16, 127, 111, 48, 55, 96, 111, -96, -34, -128, 58, 65, -108, 19, 72, 39, -88, 125, 1, 39, -18, 1, 26, 36, -21, 2, -75, 54, 93, 38, -50, 5, -36, 40, -35, 117, 17, -53, 6, -70, 43, 80, -51, -70, 27, -23, 0, 69, -31, 46, 40, 86, -14, 68, 51, 26, 114, 56, -113, 28, -50, -17, 7, 60, 100, 19, 81, 67, 37, -28, 127, -8, -8, -66, -17, 37, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 83, 113, -106, -28, -37, 36, 31, -110, 124, 74, 114, -101, -28, 42, -55, -7, -104, 31, 10, 0, -10, 105, -111, -28, -21, 36, 55, 105, -62, 111, -35, 120, 127, -1, -17, 2, -64, 44, 84, 73, -34, -92, 121, -22, -37, 20, -128, -85, 97, 8, 0, 7, -83, 78, 19, -128, -37, -122, -33, -22, 48, 77, 10, -64, 65, -86, -109, -4, -108, -2, 1, -40, -114, 119, -91, 63, 56, 0, -20, 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114, 86, -96, 11, 12, -80, -91, -66, -35, 99, -82, -41, 28, -17, -76, -29, 113, 4, 33, 67, -85, -93, 11, 12, -80, -91, 23, -23, 119, -31, -73, -91, 18, 79, -7, 109, -57, 99, 105, -66, -51, 80, 74, 7, -32, 101,开发者_运维知识库 -42, 95, 7, -64, 1, 56, 73, -1, 27, -64, -117, 103, -114, -35, -11, 120, -80, 11, 93, 96, 96, -58, -50, -45, 76, -69, -76, 23, -32, -121, 52, 33, -76, 107, 29, -46, 34, -55, -5, -12, -69, 9, -4, 117, -117, -29, 11, 66, 74, 40, -35, 5, 70, 0, 66, 65, -49, 5, -43, 109, -102, 69, 0, 125, 47, -54, -66, -91, 18, 119, 105, -90, 62, -97, 35, 8, -39, -105, -74, 6, 80, 23, 24, -104, -71, 46, 79, 107, 111, -45, -19, 69, -3, 121, -121, 99, -81, -114, 47, -74, -4, 29, -126, -112, -95, -23, 2, 3, 71, -92, 111, 80, -35, -28, -95, -51, -39, 58, 39, -23, 127, 35, -7, -31, -119, -29, -83, 35, 8, 25, 74, -107, -28, -37, -108, -17, 2, 35, 0, 97, 68, -65, 100, -73, 11, -7, 54, -51, 55, -25, -43, 11, 121, -105, -9, -126, -85, -35, 99, -98, -45, -11, -8, 110, 58, -84, -86, -94, 11, 12, 28, 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-28, -18, -17, -19, -72, -5...

But when it passed to content value it shows like as given below

Signature=[B@44fae130

The Problem is that i want to know which is that data that need to be stored in my database with field name signature whose datatype is blog i.e. is the first one with a lot of numbers or other one(=[B@44fae130)

Is it the right way i have used an image to store as byte to database..............Is there any other method to save image as byte to database...?

log prints the value in this way [B@44fae130.