Используйте библиотеку Volley для отправки и получения данных с сервера (Android — PHP)
Мне нужно отправить JSONObject на сервер и получить другой JSONObject от него. но я не могу отправить JSONObject на сервер, другими словами, мой JSONObject отправляется на сервер с нулевым значением.
Код Android:
JsonObjectRequest request = new JsonObjectRequest(Request.Method.POST,
getUrl(), new JSONObject("{\"command\":\"get_ad_list\"}"), new Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject response) {
Log.e("xxxxxxxxx-result ", response.toString());
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Log.e("xxxxxxxxx-error ", error.toString());
}
});
request.setRetryPolicy(new DefaultRetryPolicy(8000,
DefaultRetryPolicy.DEFAULT_MAX_RETRIES, DefaultRetryPolicy.DEFAULT_BACKOFF_MULT));
RequestQueue requestQueue = Volley.newRequestQueue(context);
requestQueue.add(request);
PHP-код:
<?php
$post_data=@$_POST['myjson'];
$post_data=json_decode($post_data,true);
$command=$post_data['command'];
echo $command; //$command is null!
?>
Решение
protected void fetchWebpage() {
/*
Json
*/
final JSONObject json = new JSONObject();
final JSONObject manJson = new JSONObject();
try {
manJson.put("VALUE_1", "HELLO");
manJson.put("VALUE_2", "AM");
manJson.put("VALUE_3", "VOLLEY");
/*
More values here
*/
final String j = json.put("UPDATE", manJson).toString();
// starts here
final String base_url = "https://google.com";
// Instantiate the RequestQueue.
RequestQueue queue = Volley.newRequestQueue(this);
// Request a string response from the provided URL.
StringRequest stringRequest = new StringRequest(Request.Method.POST, base_url, new Response.Listener<String>() {
@Override
public void onResponse(String response) {
/*
YOUR RESPONSE FROM SERVER IS HERE
*/
Log.i(TAG, "received "+response);
// process your response if return json
try {
JSONObject object = (JSONObject) new JSONTokener(response).nextValue();
Sting value_returned_from_server_1 = object.getString("value_you_return_1");
Sting value_returned_from_server_2 = object.getString("value_you_return_2");
/*
MORE VALUES HERE
*/
} catch (JSONException e) {
/*Show results*/
Log.i(TAG, "ERROR JSON "+e.getMessage());
return;
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
//perform operation here after getting error
/* unsuccessfully result - no internet */
return;
}
}) {
@Override
protected Map<String, String> getParams() {
Map<String, String> params = new HashMap<String, String>();
//pack message into json
try {
params.put("json", j.toString());
} catch (Exception e) {
//Log.i(TAG,"Map error: Unable to compile post");
}
return params;
}
@Override
public Map<String, String> getHeaders() throws AuthFailureError {
Map<String, String> params = new HashMap<String, String>();
params.put("Content-Type", "application/x-www-form-urlencoded");
return params;
}
};
// Add the request to the RequestQueue.
queue.add(stringRequest);
// ends here
return;
} catch (Exception e) {
//Log.i(TAG,"ERROR: Unable to get setup settings");
} // end exception write
return;
}
Другие решения
попробуй это :
JSONObject jsonObject = new JSONObject();
try {
jsonObject.put("command","get_ad_list");
} catch (JSONException e) {
e.printStackTrace();
}
JsonObjectRequest request = new JsonObjectRequest(Request.Method.POST,
getUrl(), jsonObject, new Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject response) {
Log.e("xxxxxxxxx-result ", response.toString());
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Log.e("xxxxxxxxx-error ", error.toString());
}
});
request.setRetryPolicy(new DefaultRetryPolicy(8000,
DefaultRetryPolicy.DEFAULT_MAX_RETRIES, DefaultRetryPolicy.DEFAULT_BACKOFF_MULT));
RequestQueue requestQueue = Volley.newRequestQueue(context);
requestQueue.add(request);