نمایش حروف فارسی بصورت ؟؟؟؟؟؟

سلام دوستان . وقت بخیر

مشکلی که واسم پیش اومده مربوط میشه به ارسال اطلاعات به سرور از طریق اپ اندروید

حروف داخل هاست قرار میگیره اما بصورت ؟؟؟؟؟

 new Webservice(RegisterPage.this).execute(".../insert.php?codenation="+CodeNation+"&personname="+Person+"&byid="+ByID);

روی سرور برابر آموزش های LAMP همه ی تنظیمات رو اوکی کردم

این هم سورس webservice 

public class Webservice extends AsyncTask<String, Void, String> {
         private static Context context;
        public Webservice(Context c) {
            context = c;
        }
        @Override
        protected String doInBackground(String... params) {
            // These two need to be declared outside the try/catch
            // so that they can be closed in the finally block.
            HttpURLConnection urlConnection = null;
            BufferedReader reader = null;
            String Link =  params[0];

            // Will contain the raw JSON response as a string.
            String forecastJsonStr = null;

            try {
                // Construct the URL for the OpenWeatherMap query
                // Possible parameters are avaiable at OWM's forecast API page, at
                // http://openweathermap.org/API#forecast
                URL url = new URL(Link);

                // Create the request to OpenWeatherMap, and open the connection
                urlConnection = (HttpURLConnection) url.openConnection();
                urlConnection.setRequestMethod("GET");

                urlConnection.connect();

                // Read the input stream into a String
                InputStream inputStream = urlConnection.getInputStream();
                StringBuffer buffer = new StringBuffer();
                if (inputStream == null) {
                    // Nothing to do.
                    return null;
                }
                reader = new BufferedReader(new InputStreamReader(inputStream));

                String line;
                while ((line = reader.readLine()) != null) {
                    // Since it's JSON, adding a newline isn't necessary (it won't affect parsing)
                    // But it does make debugging a *lot* easier if you print out the completed
                    // buffer for debugging.
                    buffer.append(line + "\n");
                }

                if (buffer.length() == 0) {
                    // Stream was empty.  No point in parsing.
                    return null;
                }
                forecastJsonStr = buffer.toString();
                return forecastJsonStr;
            } catch (IOException e) {
                Log.e("PlaceholderFragment", "Error ", e);
                // If the code didn't successfully get the weather data, there's no point in attemping
                // to parse it.
                return null;
            } finally{
                if (urlConnection != null) {
                    urlConnection.disconnect();
                }
                if (reader != null) {
                    try {
                        reader.close();
                    } catch (final IOException e) {
                        Log.e("PlaceholderFragment", "Error closing stream", e);
                    }
                }
            }
        }

        @Override
        protected void onPostExecute(String s) {
            super.onPostExecute(s);

           //Toast.makeText(context, s, Toast.LENGTH_SHORT).show();

        }