You need to make a request, and send the params array
"postData": { "mimeType": "application/x-www-form-urlencoded", "text": "quantity[26077:3AYToyOntpOjU1O3M6MjoiODQiO2k6NTY7czoyOiI4NiI7fQ==]=5&remove=&checkout_customer[address_id]=0®ister=0&checkout_customer[main_firstname]=test&checkout_customer[main_telephone]=5555555555&checkout_customer[main_email]=test:40test.test&checkout_customer[main_city]=test&checkout_customer[main_address_1]=test&checkout_customer[main_comment]=&checkout_customer[main_lastname]=&checkout_customer[main_fax]=&checkout_customer[main_company]=&checkout_customer[main_company_id]=&checkout_customer[main_tax_id]=&checkout_customer[main_address_2]=&checkout_customer[main_postcode]=&checkout_customer[main_country_id]=&checkout_customer[main_zone_id]=0&shipping_address_same=1&simple_create_order=&simple_step=&simple_step_next=&simple_errors=", "params": [ { quantity[26077:YToyOntpOjU1O3M6MjoiODQiO2k6NTY7czoyOiI4NiI7fQ==] "name": "quantity[26077:3AYToyOntpOjU1O3M6MjoiODQiO2k6NTY7czoyOiI4NiI7fQ==]", "value": "5" }, { "name": "remove", "value": "" }, { "name": "checkout_customer[address_id]", "value": "0" }, { "name": "register", "value": "0" }, { "name": "checkout_customer[main_firstname]", "value": "test" }, { "name": "checkout_customer[main_telephone]", "value": "5555555555" }, { "name": "checkout_customer[main_email]", "value": "test:40test.test" }, { "name": "checkout_customer[main_city]", "value": "test" }, { "name": "checkout_customer[main_address_1]", "value": "test" }, { "name": "checkout_customer[main_comment]", "value": "" }, { "name": "checkout_customer[main_lastname]", "value": "" }, { "name": "checkout_customer[main_fax]", "value": "" }, { "name": "checkout_customer[main_company]", "value": "" }, { "name": "checkout_customer[main_company_id]", "value": "" }, { "name": "checkout_customer[main_tax_id]", "value": "" }, { "name": "checkout_customer[main_address_2]", "value": "" }, { "name": "checkout_customer[main_postcode]", "value": "" }, { "name": "checkout_customer[main_country_id]", "value": "" }, { "name": "checkout_customer[main_zone_id]", "value": "0" }, { "name": "shipping_address_same", "value": "1" }, { "name": "simple_create_order", "value": "" }, { "name": "simple_step", "value": "" }, { "name": "simple_step_next", "value": "" }, { "name": "simple_errors", "value": "" } ] } }, How to do this with volley?