Попробуйте это
JSONObject sendObject = new JSONObject();
try {
JSONArray dobDocuments = new JSONArray();
dobDocuments.put("/10287797/metod-zalpovogo-soobscheniya-jsonarray");
dobDocuments.put("/10287797/metod-zalpovogo-soobscheniya-jsonarray");
JSONArray educationDocuments = new JSONArray();
educationDocuments.put("/10287797/metod-zalpovogo-soobscheniya-jsonarray");
educationDocuments.put("/10287797/metod-zalpovogo-soobscheniya-jsonarray");
JSONArray addressDocuments = new JSONArray();
addressDocuments.put("/10287797/metod-zalpovogo-soobscheniya-jsonarray");
addressDocuments.put("/10287797/metod-zalpovogo-soobscheniya-jsonarray");
sendObject.put("dobDocuments", dobDocuments);
sendObject.put("educationDocuments", addressDocuments);
sendObject.put("addressDocuments", addressDocuments);
sendObject.put("mobileNo", "9876543210");
} catch (JSONException e) {
}
Log.e("JSONObject",sendObject.toString());
OUTPUT
{
"dobDocuments": ["https:\/\/stackoverflow.com\/questions\/50128021\/volley-post-method-jsonarray", "https:\/\/stackoverflow.com\/questions\/50128021\/volley-post-method-jsonarray"],
"educationDocuments": ["https:\/\/stackoverflow.com\/questions\/50128021\/volley-post-method-jsonarray", "https:\/\/stackoverflow.com\/questions\/50128021\/volley-post-method-jsonarray"],
"addressDocuments": ["https:\/\/stackoverflow.com\/questions\/50128021\/volley-post-method-jsonarray", "https:\/\/stackoverflow.com\/questions\/50128021\/volley-post-method-jsonarray"],
"mobileNo": "9876543210"
}