使用Android中的凌空，使用JsonArrayRequest将JSON数组POST到Mysql数据库？

Question

This is my code for JsonArrayRequest I think either it is incomplete or incorrect. The problem is nothing getting added into the database and I am not getting any errors. I am new to programming so I have no idea as to where I might be going wrong.

private void insertToDb() {
    JsonArrayRequest jsonArrayRequest = new JsonArrayRequest(Request.Method.POST, INVEST_URL,
            itemSelectedJson, new Response.Listener<JSONArray>() {
        @Override
        public void onResponse(JSONArray response) {
            Toast.makeText(AddInvEst.this, "The echoed response is "+response, Toast.LENGTH_SHORT).show();
        }
    }, new Response.ErrorListener() {
        @Override
        public void onErrorResponse(VolleyError error) {

        }
    }){
        @Override
        public Map<String, String> getHeaders() throws AuthFailureError {
            Map<String,String> headers = new HashMap<String, String>();
            headers.put("Content-Type","application/json");
            headers.put("Accept", "application/json");
            return headers;
        }
    };
    RequestQueue requestQueue = Volley.newRequestQueue(this);
    requestQueue.add(jsonArrayRequest);
}

This is code for creating a jsonArray

private void selectedItems() {

    billType = (invEstSwitch.isChecked() ? textViewEstimate : textViewInvoice)
            .getText().toString();

    itemselected.put("custInfo", custSelected.toString());
    itemselected.put("invoiceNo", textViewInvNo.getText().toString());
    itemselected.put("barcode", barCode.getText().toString());
    itemselected.put("desc", itemDesc.getText().toString());
    itemselected.put("weight", weightLine.getText().toString());
    itemselected.put("rate", rateAmount.getText().toString());
    itemselected.put("makingAmt", makingAmount.getText().toString());
    itemselected.put("net_rate", netRate.getText().toString());
    itemselected.put("itemTotal", itemtotal.getText().toString());
    itemselected.put("vat", textViewVat.getText().toString());
    itemselected.put("sum_total", textViewSum.getText().toString());
    itemselected.put("bill_type", billType);
    itemselected.put("date", textViewCurrentDate.getText().toString());

    //Add the map to the Array
    itemSelectedJson.put(itemselected);
    index++;
}

And this is my php code.

<?php
require "init.php";
$json = file_get_contents('php://input'); 
//$data = json_decode($json,true);
// remove the ,true so the data is not all converted to arrays
$data = json_decode($json);
// Now process the array of objects
foreach ( $data as $inv ) {
    $custInfo = $inv->custInfo;
    $rate =     $inv->rate;
    $weight=    $inv->weight;
    $desc=      $inv->desc;
    $makingAmt= $inv->makingAmt;
    $vat=       $inv->vat;
    $itemTotal= $inv->itemTotal;
    $sum_total= $inv->sum_total;
    $barcode=   $inv->barcode;
    $net_rate=  $inv->net_rate;
    $date=      $inv->date;
    $invoiceNo= $inv->invoiceNo;
    $bill_type= $inv->bill_type;
    $sql = "INSERT INTO selected_items 
             (custInfo, invoiceNo, barcode, desc, 
              weight, rate, makingAmt,net_rate,
              itemTotal,vat,sum_total,bill_type,date) 
            VALUES
             ('$custInfo','$invoiceNo','$barcode','$desc',
              '$weight','$rate','$makingAmt','$net_rate',
              '$itemTotal','$vat','$sum_total','$bill_type','$date')";
    $res = mysql_query($sql,$con);
    if(!$res){
        $result = new stdClass();
        $result->status = false;
        $result->msg = mysql_error();
        echo json_encode($result);
        exit;
    }
}
?>

Answer 1

You missed to add a method getParams() inside the post request, it should have this structure

StringRequest stringRequest = new StringRequest(Request.Method.POST, "url",
            new Response.Listener<String>() {
                @Override
                public void onResponse(String response) {

                    }
                }
            },
            new Response.ErrorListener() {
                @Override
                public void onErrorResponse(VolleyError error) {
                    errorHandler(error);
                }
            }){
        @Override
        protected Map<String, String> getParams() throws AuthFailureError {
            Map<String,String> params = new HashMap<>();
            //Adding parameters to request
            params.put("KEY1", key1);
            params.put("KEY2", key2);

            //returning parameter
            return params;
        }
    };

    //Adding the string request to the queue
    RequestQueue requestQueue = Volley.newRequestQueue(this);
    requestQueue.add(stringRequest);
}