Android Volley: How to Send POST/GET Parameters

├Źndice
  1. Overview
  2. Sending GET Parameters
  3. Sending POST Parameters
  4. Conclusion

Overview

When developing an Android app that requires network communication, it's common to use a library like Volley to handle HTTP requests. Volley is a popular choice due to its simplicity and efficiency. In this article, we'll discuss how to send POST and GET parameters using Volley.

Sending GET Parameters

Sending GET parameters using Volley is straightforward. We can simply append the parameters to the URL as query parameters. Let's take a look at an example:


    String url = "http://example.com/api/get_data";
    StringRequest stringRequest = new StringRequest(Request.Method.GET, url + "?param1=value1¶m2=value2",
            new Response.Listener<String>() {
                @Override
                public void onResponse(String response) {
                    // Handle response
                }
            }, new Response.ErrorListener() {
        @Override
        public void onErrorResponse(VolleyError error) {
            // Handle error
        }
    });

    // Add the request to the RequestQueue.
    Volley.newRequestQueue(this).add(stringRequest);

In the above code, we're sending a GET request to the URL "http://example.com/api/get_data" with two query parameters: "param1" and "param2". We're using a StringRequest to make the request, and we're setting the method to GET.

Sending POST Parameters

Sending POST parameters using Volley requires a bit more work than sending GET parameters. We need to create a Map of key-value pairs, where the key is the parameter name and the value is the parameter value. We then need to pass this Map to the request body.

Let's take a look at an example:


    String url = "http://example.com/api/post_data";
    Map<String, String> params = new HashMap<>();
    params.put("param1", "value1");
    params.put("param2", "value2");

    JsonObjectRequest jsonObjectRequest = new JsonObjectRequest(Request.Method.POST, url, new JSONObject(params),
            new Response.Listener<JSONObject>() {
                @Override
                public void onResponse(JSONObject response) {
                    // Handle response
                }
            }, new Response.ErrorListener() {
        @Override
        public void onErrorResponse(VolleyError error) {
            // Handle error
        }
    });

    // Add the request to the RequestQueue.
    Volley.newRequestQueue(this).add(jsonObjectRequest);

In the above code, we're sending a POST request to the URL "http://example.com/api/post_data" with two parameters: "param1" and "param2". We're using a JsonObjectRequest to make the request, and we're setting the method to POST. We're also passing the Map of parameters to the request body as a JSONObject.

Conclusion

Sending GET and POST parameters using Volley is simple once you understand the process. By using Volley, we can efficiently handle HTTP requests in our Android apps.

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