how to get byte from selected image file in android

two options 1. ByteBuffer dst= ByteBuffer.allocate(lnth); bit.copyPixelsToBuffer( dst); bytes=dst.array(); String a =bytes.toString(); 2. picView.setImageBitmap(thePic); ByteArrayOutputStream out = new ByteArrayOutputStream(); thePic.compress(Bitmap.CompressFormat.PNG, 100, out); byte[] bytes = out.toByteArray(); read Bitmap bit = null ; ByteArrayInputStream input; input = new ByteArrayInputStream(bytes); bit= BitmapFactory.decodeStream(input);