how to convert base64 string image to blob in android? -

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I have a base 64 string image. I want to convert it to blob type and save it to the database .. I have 

  string base64Image = "iVBORw0KGgoAAAANSUhEUgAAAGAAAACgCAYAAADzcGmMAAAACSV ...";

This is what I have tried. 

  byte [] byteImage = org.apache.commons.codec.binary.Base64.decodeBase64 (befImage. GetBytes ()); Json.put ("during_unloading_photo", byte image);

Where JSON is the name of my JSONObject and during_unloading_photo column which is the Blob type. To save Blob in

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