Json com android

[everton881 0]

Boa noite,

Sou novo em programação android e estou precisando de ajuda, preciso fazer um apk que conecte a um webservice via json. O apk que estou fazendo é de horoscopo, e encontrei o Json já pronto e online. Só que minha aplicação fecha ao atualizar as informações alguém poderia me informar o que ta de errado em meu código e me ajudar.

Segue o AsynTask para conectar com o serviço e o link do Json ja pronto é este: http://developers.agenciaideias.com.br/horoscopo.

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

@Override

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

HttpURLConnection urlConnection = null;

BufferedReader reader = null;

String forecastJsonStr = null;

String format = "json";

String units = "metric";

int numDays = 1;

try {

final String FORECAST_BASE_URL =

"http://developers.agenciaideias.com.br/horoscopo/json";

final String QUERY_PARAM = "q";

final String FORMAT_PARAM = "mode";

final String UNITS_PARAM = "units";

final String DAYS_PARAM = "cnt";

Uri uri = 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))

.build();

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

// Construct the URL for the OpenWeatherMap query

// Possible parameters are available at OWM's forecast API page, at

// http://openweathermap.org/API#forecast

// 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.

forecastJsonStr = null;

}

forecastJsonStr = buffer.toString();

} catch (IOException e) {

Log.e("PlaceholderFragment", "Error ", e);

// If the code didn't successfully get the weather data, there's no point in attempting

// to parse it.

forecastJsonStr = null;

} finally {

if (urlConnection != null) {

urlConnection.disconnect();

}

if (reader != null) {

try {

reader.close();

} catch (final IOException e) {

Log.e("PlaceholderFragment", "Error closing stream", e);

}

}

}

String[] returnStrs = new String[0];

try {

return TesteJson.getSignosFromJson(

forecastJsonStr, numDays);

} catch (JSONException e) {

e.printStackTrace();

}

return returnStrs;

}

}

E aqui tento pegar as informações do Json;

public class TesteJson {

private static String getReadableDateString(long time){

Date date = new Date(time * 1000);

SimpleDateFormat format = new SimpleDateFormat("E, MMM d");

return format.format(date).toString();

}

public static String[] getSignosFromJson(String forecastJsonStr, int numDays)

throws JSONException {

final String signos = "signos";

final String nome = "nome";

final String data = "data";

final String msg = "msg";

final String periodo = "periodo";

JSONObject forecastJson = new JSONObject(forecastJsonStr);

JSONArray SignosArray = forecastJson.getJSONArray(signos);

String[] resultSet = new String[numDays];

for(int i =0; i < SignosArray.length(); i++){

String dia;

String nomeSigno;

String mensagem;

String per;

JSONObject dayForecast = new JSONObject(String.valueOf(i));

long dataTime = dayForecast.getLong(data);

dia = getReadableDateString(dataTime);

JSONObject signoNome = dayForecast.getJSONObject(nome);

nomeSigno = SignosArray.getString(Integer.parseInt(nome));

JSONObject msgsigno = dayForecast.getJSONObject(msg);

mensagem = SignosArray.getString(Integer.parseInt(msg));

JSONObject periodoJson = dayForecast.getJSONObject(periodo);

per = SignosArray.getString(Integer.parseInt(periodo));

resultSet = dia + "\n" + nomeSigno + "\n" + mensagem;

}

return resultSet;

}

}