服务器从android应用接收空的JSON字符串数组

Question

I am sending image data from my android app to server,I can see in log that string array is not empty and has correct data but on server it receive null.

Here is my AsyncTask from where i am sending data to server

protected Void doInBackground(Void... params) {
        BufferedReader reader;

        try {

            URL url = new URL("http://www.example.com/Data/galleryLog.php");

            HttpURLConnection connection = (HttpURLConnection) url.openConnection();
            connection.setRequestMethod("POST");
            connection.setDoInput(true);
            connection.setDoOutput(true);

            Log.d(TAG,"String Data "+Images);

            //For POST Only - Begin
            OutputStream os = connection.getOutputStream();
            BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(os, "UTF-8"));
            writer.write(Images);
            writer.flush();
            writer.close();
            os.close();
            connection.connect();
            //For POST Only End
            int responseCode = connection.getResponseCode();
            Log.d(TAG, "POST RESPONSE CODE " + responseCode);
            String LoginResult;
            if (responseCode == HttpURLConnection.HTTP_OK) {
                //Success
                Log.d(TAG, "Success connection with database");
                reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
                String inputLine;
                StringBuffer response = new StringBuffer();

                while ((inputLine = reader.readLine()) != null) {
                    response.append(inputLine);
                }
                reader.close();

                Log.d(TAG, "Reader Close - Printing Result ");
                //Print Result
                Log.d(TAG, "Calling Response " + response.toString());
            }


            return null;
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        } catch (ProtocolException e) {
            e.printStackTrace();
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }

This is the string i got in logcat which is not empty and has correct data

String Data {"galleryDesc":"My First Gallery","images":[{"base64code":"Base64Image","type":"jpg","imagename":"image-101.jpg"}],"User_ID":"18","galleryTitle":"Image-101.jpg"}

My Php Code where i am printing received data into file but it give me blank file always

<?php
$tm = 'ritu_gallery_'.time().'.log';
file_put_contents($tm, print_r($_POST, TRUE));

echo "Response<br>";
print_r($_POST);
?>

Its create text file like that

Array ( )

UPDATE: its an issue in AsyncTask String array. I don't know why its not working.If anyone knows please let me know

When i am sending this string array to server.it's print blank values on server

 {"galleryDesc":"My First Gallery","images":[{"base64code":"Base64Image","type":"jpg","imagename":"image-101.jpg"}],"User_ID":"18","galleryTitle":"Image-101.jpg"}

when i add above String array into this

String data= URLEncoder.encode("Pic","UTF-8")+ "=" +URLEncoder.encode(Images,"UTF-8");

It creates file on server like this

Array ( [Pics] => {"galleryDesc":"My First Gallery","images":[{"base64code":"Base64Image","type":"jpg","imagename":"101.jpg"}],"User_ID":"18","galleryTitle":"101.jpg"} )

with all correct values.If anyone know why this is happening. Please let me know

Answer 1

您在这里访问错误的变量，图像是文件，它将在$_FILE变量中而不在$ _POST变量中，而且表单应该是多部分的formdata，我不知道您是否正在这样做，否则我不会对android不太了解，但是如果这样做，那么您可以在$ _FILE变量中看到文件