--- /dev/null
+package uk.me.njae.sunshine;
+
+import android.net.Uri;
+import android.os.AsyncTask;
+import android.os.Bundle;
+import android.support.v4.app.Fragment;
+import android.util.Log;
+import android.view.LayoutInflater;
+import android.view.Menu;
+import android.view.MenuInflater;
+import android.view.MenuItem;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.ArrayAdapter;
+import android.widget.ListView;
+
+import org.json.JSONArray;
+import org.json.JSONException;
+import org.json.JSONObject;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.net.HttpURLConnection;
+import java.net.URL;
+import java.text.SimpleDateFormat;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Date;
+import java.util.List;
+
+/**
+ * A placeholder fragment containing a simple view.
+ */
+public class ForecastFragment extends Fragment {
+
+ private ArrayAdapter<String> mForecastAdapter;
+
+ public ForecastFragment() {
+ }
+
+ @Override
+ public void onCreate(Bundle savedInstanceState) {
+ super.onCreate(savedInstanceState);
+ setHasOptionsMenu(true);
+ }
+
+ @Override
+ public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
+ // Inflate the menu; this adds items to the action bar if it is present.
+ inflater.inflate(R.menu.forecastfragment, menu);
+ }
+
+ @Override
+ public boolean onOptionsItemSelected(MenuItem item) {
+ // Handle action bar item clicks here. The action bar will
+ // automatically handle clicks on the Home/Up button, so long
+ // as you specify a parent activity in AndroidManifest.xml.
+ int id = item.getItemId();
+ if (id == R.id.action_refresh) {
+ FetchWeatherTask weatherTask = new FetchWeatherTask();
+ weatherTask.execute("94043");
+ return true;
+ }
+ return super.onOptionsItemSelected(item);
+ }
+
+ @Override
+ public View onCreateView(LayoutInflater inflater, ViewGroup container,
+ Bundle savedInstanceState) {
+
+ String[] forecastArray = {
+ "Today - Sunny - 10/10",
+ "Tomorrow - Cloudy - 11/11",
+ "Tuesday - Snow - 12/12",
+ "Wednesday - Rain - 13/13",
+ "Thursday - Hail - 14/14",
+ "Friday - Scorchio - 15/15",
+ "Saturday - Fog - 16/16"
+ };
+
+ List<String> weekForecast = new ArrayList<String>(
+ Arrays.asList(forecastArray));
+ mForecastAdapter = new ArrayAdapter<String>(
+ getActivity(),
+ R.layout.list_item_forecast,
+ R.id.list_item_forecast_textview,
+ weekForecast
+ );
+
+ View rootView = inflater.inflate(R.layout.fragment_main, container, false);
+
+ ListView list_view = (ListView) rootView.findViewById(R.id.listview_forecast);
+ list_view.setAdapter(mForecastAdapter);
+
+ return rootView;
+ }
+
+ public class FetchWeatherTask extends AsyncTask<String, Void, String[]> {
+
+ private final String LOG_TAG = FetchWeatherTask.class.getSimpleName();
+
+ @Override
+ protected void onPostExecute(String[] result) {
+ if (result != null) {
+ mForecastAdapter.clear();
+// for (String dayForecastStr: result) {
+// mForecastAdapter.add(dayForecastStr);
+// }
+ mForecastAdapter.addAll(result);
+ }
+ }
+
+ @Override
+ protected String[] doInBackground(String... 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;
+
+ 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
+ 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";
+
+ 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))
+ .build();
+
+ URL url = new URL(builtUri.toString());
+/**/ Log.v(LOG_TAG, "Built URI " + builtUri.toString());
+
+ // 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();
+// Log.v(LOG_TAG, "Forecast JSON string: " + forecastJsonStr);
+ try {
+ return getWeatherDataFromJson(forecastJsonStr, numDays);
+ } catch (JSONException e) {
+ Log.e(LOG_TAG, e.getMessage(), e);
+ e.printStackTrace();
+ }
+
+ // This will only happen if we fail to read the forecast
+ return null;
+
+ } catch (IOException e) {
+ Log.e(LOG_TAG, "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(LOG_TAG, "Error closing stream", e);
+ }
+ }
+ }
+ return null;
+ }
+
+ /* The date/time conversion code is going to be moved outside the asynctask later,
+ * so for convenience we're breaking it out into its own method now.
+ */
+ private String getReadableDateString(long time) {
+ // Because the API returns a unix timestamp (measured in seconds),
+ // it must be converted to milliseconds in order to be converted to valid date.
+ Date date = new Date(time * 1000);
+ SimpleDateFormat format = new SimpleDateFormat("E, MMM d");
+ return format.format(date).toString();
+ }
+
+ /**
+ * Prepare the weather high/lows for presentation.
+ */
+ private String formatHighLows(double high, double low) {
+ // For presentation, assume the user doesn't care about tenths of a degree.
+ long roundedHigh = Math.round(high);
+ long roundedLow = Math.round(low);
+
+ String highLowStr = roundedHigh + "/" + roundedLow;
+ return highLowStr;
+ }
+
+ /**
+ * Take the String representing the complete forecast in JSON Format and
+ * pull out the data we need to construct the Strings needed for the wireframes.
+ * <p/>
+ * Fortunately parsing is easy: constructor takes the JSON string and converts it
+ * into an Object hierarchy for us.
+ */
+ private String[] getWeatherDataFromJson(String forecastJsonStr, int numDays)
+ throws JSONException {
+
+ // These are the names of the JSON objects that need to be extracted.
+ final String OWM_LIST = "list";
+ final String OWM_WEATHER = "weather";
+ final String OWM_TEMPERATURE = "temp";
+ final String OWM_MAX = "max";
+ final String OWM_MIN = "min";
+ final String OWM_DATETIME = "dt";
+ final String OWM_DESCRIPTION = "main";
+
+ JSONObject forecastJson = new JSONObject(forecastJsonStr);
+ JSONArray weatherArray = forecastJson.getJSONArray(OWM_LIST);
+
+ String[] resultStrs = new String[numDays];
+ for (int i = 0; i < weatherArray.length(); i++) {
+ // For now, using the format "Day, description, hi/low"
+ String day;
+ String description;
+ String highAndLow;
+
+ // Get the JSON object representing the day
+ JSONObject dayForecast = weatherArray.getJSONObject(i);
+
+ // The date/time is returned as a long. We need to convert that
+ // into something human-readable, since most people won't read "1400356800" as
+ // "this saturday".
+ long dateTime = dayForecast.getLong(OWM_DATETIME);
+ day = getReadableDateString(dateTime);
+
+ // description is in a child array called "weather", which is 1 element long.
+ JSONObject weatherObject = dayForecast.getJSONArray(OWM_WEATHER).getJSONObject(0);
+ description = weatherObject.getString(OWM_DESCRIPTION);
+
+ // Temperatures are in a child object called "temp". Try not to name variables
+ // "temp" when working with temperature. It confuses everybody.
+ JSONObject temperatureObject = dayForecast.getJSONObject(OWM_TEMPERATURE);
+ double high = temperatureObject.getDouble(OWM_MAX);
+ double low = temperatureObject.getDouble(OWM_MIN);
+
+ highAndLow = formatHighLows(high, low);
+ resultStrs[i] = day + " - " + description + " - " + highAndLow;
+ }
+
+// for (String s: resultStrs) {
+// Log.v(LOG_TAG, "Forecast entry: " + s);
+// }
+ return resultStrs;
+ }
+ }
+}
projects / Sunshine.git / blobdiff