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image view  convert  to Bitmap and bitmap convert to byte[]image

image view  convert  to Bitmap

BitmapDrawable bitmapDrawable= (BitmapDrawable) imageView.getDrawable();
Bitmap bitmap=bitmapDrawable.getBitmap();

Bitmap convert to a byte array(byte[]image)

private byte[] imagaetobyte(Bitmap bitmap) {

    ByteArrayOutputStream byteArrayOutputStream=new ByteArrayOutputStream();
    bitmap.compress(Bitmap.CompressFormat.JPEG,90,byteArrayOutputStream);
    byte[]image=byteArrayOutputStream.toByteArray();
    return image;


}

byte[] convert to bitmap set in imageview 
Bitmap bitmap= BitmapFactory.decodeByteArray(reconizeimage,0,reconizeimage.length);
holder.imageview.setImageBitmap(bitmap);




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