Myconnect.java

 public class Myconnect extends AsyncTask<String, Void, String[]>{

        @Override
        protected String[] doInBackground(String... params) {

            // If there's no zip code, there's nothing to look up.  Verify size of params.
            if (params.length == 0) {
                return null;
            }

            // 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;

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

            //
            String format = "json";
            String units = "metric";
            int numDays = 7;


            try {

                // Construct the URL for the OpenWeatherMap query
                // Possible parameters are avaiable at OWM's forecast API page, at
                // http://openweathermap.org/API#forecast
                //ref: https://developer.android.com/reference/android/net/Uri.Builder.html

                final String FORECAST_BASE_URL =
                        "http://api.openweathermap.org/data/2.5/forecast/daily?";
                final String QUERY_PARAM = "q";
                final String FORMAT_PARAM = "mode";
                final String UNITS_PARAM = "units";
                final String DAYS_PARAM = "cnt";
                final String APPID_PARAM = "APPID";

                Uri builtUri = Uri.parse(FORECAST_BASE_URL).buildUpon()
                        .appendQueryParameter(QUERY_PARAM, params[0])
                        .appendQueryParameter(FORMAT_PARAM, format)
                        .appendQueryParameter(UNITS_PARAM, units)
                        .appendQueryParameter(DAYS_PARAM, Integer.toString(numDays))
                        .appendQueryParameter(APPID_PARAM, BuildConfig.OPEN_WEATHER_MAP_API_KEY)
                        .build();

                URL url = new URL(builtUri.toString());

                Log.v(LOG_TAG, "Built URI " + builtUri.toString());

                // Create the request 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));
                Log.v("MENU", "Entrou no line = reader.readLine()) != null--> " + buffer.toString());

                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");
                    Log.v("MENU", "reader = new BufferedReader(new InputStreamReader(inputStream));--> " + reader.readLine());
                }

                if (buffer.length() == 0) {
                    // Stream was empty.  No point in parsing.
                    return null;
                }
                //My String in JSON
                forecastJsonStr = buffer.toString();

                Log.v("MENU", "forecastJsonStr--> " + forecastJsonStr);

            } catch (IOException e) {
                Log.e("DetailFragment", "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("DetailFragment", "Error closing stream", e);
                    }
                }
            }
            try {
                
                return getWeatherDataFromJson(forecastJsonStr, numDays);


            }catch (JSONException e){
                Log.e("DetailFragment", "Error closing stream", e);
            }


            // This will only happen if there was an error getting or parsing the forecast.
            return null;
        }