git.gumartinm.name Git - JavaForFun/blob

   1 package com.weather.information.fragment.overview;
   2
   3 import java.io.IOException;
   4 import java.net.MalformedURLException;
   5 import java.net.URISyntaxException;
   6 import java.net.URL;
   7 import java.text.DecimalFormat;
   8 import java.text.NumberFormat;
   9 import java.text.SimpleDateFormat;
  10 import java.util.ArrayList;
  11 import java.util.Calendar;
  12 import java.util.Date;
  13 import java.util.List;
  14 import java.util.Locale;
  15
  16 import org.apache.http.client.ClientProtocolException;
  17
  18 import android.content.BroadcastReceiver;
  19 import android.content.ComponentName;
  20 import android.content.Context;
  21 import android.content.Intent;
  22 import android.content.IntentFilter;
  23 import android.content.SharedPreferences;
  24 import android.graphics.Bitmap;
  25 import android.graphics.BitmapFactory;
  26 import android.net.http.AndroidHttpClient;
  27 import android.os.AsyncTask;
  28 import android.os.Bundle;
  29 import android.preference.PreferenceManager;
  30 import android.support.v4.app.ListFragment;
  31 import android.support.v4.content.LocalBroadcastManager;
  32 import android.util.Log;
  33 import android.view.View;
  34 import android.widget.ListView;
  35
  36 import com.fasterxml.jackson.core.JsonParseException;
  37 import com.weather.information.R;
  38 import com.weather.information.fragment.specific.SpecificFragment;
  39 import com.weather.information.httpclient.CustomHTTPClient;
  40 import com.weather.information.model.DatabaseQueries;
  41 import com.weather.information.model.WeatherLocation;
  42 import com.weather.information.model.forecastweather.Forecast;
  43 import com.weather.information.parser.JPOSWeatherParser;
  44 import com.weather.information.service.IconsList;
  45 import com.weather.information.service.PermanentStorage;
  46 import com.weather.information.service.ServiceParser;
  47
  48 public class OverviewFragment extends ListFragment {
  49     private static final String TAG = "OverviewFragment";
  50     private BroadcastReceiver mReceiver;
  51
  52     @Override
  53     public void onCreate(final Bundle savedInstanceState) {
  54         super.onCreate(savedInstanceState);
  55     }
  56
  57     @Override
  58     public void onActivityCreated(final Bundle savedInstanceState) {
  59         super.onActivityCreated(savedInstanceState);
  60
  61         final ListView listWeatherView = this.getListView();
  62         listWeatherView.setChoiceMode(ListView.CHOICE_MODE_NONE);
  63
  64         if (savedInstanceState != null) {
  65             // Restore UI state
  66             final Forecast forecast = (Forecast) savedInstanceState.getSerializable("Forecast");
  67
  68             if (forecast != null) {
  69                 final PermanentStorage store = new PermanentStorage(this.getActivity().getApplicationContext());
  70                 store.saveForecast(forecast);
  71             }
  72         }
  73
  74         this.setHasOptionsMenu(false);
  75
  76         this.setEmptyText(this.getString(R.string.text_field_remote_error));
  77         this.setListShownNoAnimation(false);
  78     }
  79
  80     @Override
  81     public void onResume() {
  82         super.onResume();
  83
  84         this.mReceiver = new BroadcastReceiver() {
  85
  86                         @Override
  87                         public void onReceive(final Context context, final Intent intent) {
  88                                 final String action = intent.getAction();
  89                                 if (action.equals("com.weather.information.UPDATEFORECAST")) {
  90                                         final Forecast forecastRemote = (Forecast) intent.getSerializableExtra("forecast");
  91
  92                                         if (forecastRemote != null) {
  93
  94                                                 // 1. Check conditions. They must be the same as the ones that triggered the AsyncTask.
  95                                                 final DatabaseQueries query = new DatabaseQueries(context.getApplicationContext());
  96                                     final WeatherLocation weatherLocation = query.queryDataBase();
  97                                     final PermanentStorage store = new PermanentStorage(context.getApplicationContext());
  98                                     final Forecast forecast = store.getForecast();
  99
 100                                         if (forecast == null || !OverviewFragment.this.isDataFresh(weatherLocation.getLastForecastUIUpdate())) {
 101                                                 // 2. Update UI.
 102                                                 OverviewFragment.this.updateUI(forecastRemote);
 103
 104                                                 // 3. Update Data.
 105                                                 store.saveForecast(forecastRemote);
 106                                             weatherLocation.setLastForecastUIUpdate(new Date());
 107                                             query.updateDataBase(weatherLocation);
 108
 109                                             // 4. Show list.
 110                                             OverviewFragment.this.setListShownNoAnimation(true);
 111                                         }
 112
 113                                         } else {
 114                                                 // Empty list and show error message (see setEmptyText in onCreate)
 115                                                 OverviewFragment.this.setListAdapter(null);
 116                                                 OverviewFragment.this.setListShownNoAnimation(true);
 117                                         }
 118                                 }
 119                         }
 120         };
 121
 122         // Register receiver
 123         final IntentFilter filter = new IntentFilter();
 124         filter.addAction("com.weather.information.UPDATEFORECAST");
 125         LocalBroadcastManager.getInstance(this.getActivity().getApplicationContext())
 126                                                         .registerReceiver(this.mReceiver, filter);
 127
 128         final DatabaseQueries query = new DatabaseQueries(this.getActivity().getApplicationContext());
 129         final WeatherLocation weatherLocation = query.queryDataBase();
 130         if (weatherLocation == null) {
 131             // Nothing to do.
 132                 // Empty list and show error message (see setEmptyText in onCreate)
 133                         this.setListAdapter(null);
 134                         this.setListShownNoAnimation(true);
 135             return;
 136         }
 137
 138         final PermanentStorage store = new PermanentStorage(this.getActivity().getApplicationContext());
 139         final Forecast forecast = store.getForecast();
 140
 141         if (forecast != null && this.isDataFresh(weatherLocation.getLastForecastUIUpdate())) {
 142             this.updateUI(forecast);
 143         } else {
 144             // Load remote data (aynchronous)
 145             // Gets the data from the web.
 146             this.setListShownNoAnimation(false);
 147             final OverviewTask task = new OverviewTask(
 148                         this.getActivity().getApplicationContext(),
 149                     new CustomHTTPClient(AndroidHttpClient.newInstance("Android 4.3 WeatherInformation Agent")),
 150                     new ServiceParser(new JPOSWeatherParser()));
 151
 152             task.execute(weatherLocation.getLatitude(), weatherLocation.getLongitude());
 153         }
 154     }
 155
 156     @Override
 157     public void onSaveInstanceState(final Bundle savedInstanceState) {
 158
 159         // Save UI state
 160         final PermanentStorage store = new PermanentStorage(this.getActivity().getApplicationContext());
 161         final Forecast forecast = store.getForecast();
 162
 163         if (forecast != null) {
 164             savedInstanceState.putSerializable("Forecast", forecast);
 165         }
 166
 167         super.onSaveInstanceState(savedInstanceState);
 168     }
 169
 170     @Override
 171     public void onPause() {
 172         LocalBroadcastManager.getInstance(this.getActivity().getApplicationContext()).unregisterReceiver(this.mReceiver);
 173
 174         super.onPause();
 175     }
 176
 177     @Override
 178     public void onListItemClick(final ListView l, final View v, final int position, final long id) {
 179         final SpecificFragment fragment = (SpecificFragment) this
 180                 .getFragmentManager().findFragmentById(R.id.weather_specific_fragment);
 181         if (fragment == null) {
 182             // handset layout
 183             final Intent intent = new Intent("com.weather.information.WEATHERINFO")
 184             .setComponent(new ComponentName("com.weather.information",
 185                     "com.weather.information.activity.SpecificActivity"));
 186             intent.putExtra("CHOSEN_DAY", (int) id);
 187             OverviewFragment.this.getActivity().startActivity(intent);
 188         } else {
 189             // tablet layout
 190             fragment.updateUIByChosenDay((int) id);
 191         }
 192     }
 193
 194     private interface UnitsConversor {
 195
 196         public double doConversion(final double value);
 197     }
 198
 199     private void updateUI(final Forecast forecastWeatherData) {
 200
 201         final SharedPreferences sharedPreferences = PreferenceManager
 202                 .getDefaultSharedPreferences(this.getActivity().getApplicationContext());
 203
 204         // TODO: repeating the same code in Overview, Specific and Current!!!
 205         // 1. Update units of measurement.
 206         String symbol;
 207         UnitsConversor unitsConversor;
 208         String keyPreference = this.getResources().getString(
 209                 R.string.weather_preferences_temperature_key);
 210         final String[] values = this.getResources().getStringArray(R.array.weather_preferences_temperature);
 211         final String unitsPreferenceValue = sharedPreferences.getString(
 212                 keyPreference, this.getString(R.string.weather_preferences_temperature_celsius));
 213         if (unitsPreferenceValue.equals(values[0])) {
 214                 symbol = values[0];
 215                 unitsConversor = new UnitsConversor(){
 216
 217                                 @Override
 218                                 public double doConversion(final double value) {
 219                                         return value - 273.15;
 220                                 }
 221
 222                 };
 223         } else if (unitsPreferenceValue.equals(values[1])) {
 224                 symbol = values[1];
 225                 unitsConversor = new UnitsConversor(){
 226
 227                                 @Override
 228                                 public double doConversion(final double value) {
 229                                         return (value * 1.8) - 459.67;
 230                                 }
 231
 232                 };
 233         } else {
 234                 symbol = values[2];
 235                 unitsConversor = new UnitsConversor(){
 236
 237                                 @Override
 238                                 public double doConversion(final double value) {
 239                                         return value;
 240                                 }
 241
 242                 };
 243         }
 244
 245
 246         // 2. Update number day forecast.
 247         keyPreference = this.getResources().getString(R.string.weather_preferences_day_forecast_key);
 248         final String dayForecast = sharedPreferences.getString(keyPreference, "5");
 249         final int mDayForecast = Integer.valueOf(dayForecast);
 250
 251
 252         // 3. Formatters
 253         final DecimalFormat tempFormatter = (DecimalFormat) NumberFormat.getNumberInstance(Locale.US);
 254         tempFormatter.applyPattern("#####.##");
 255         final SimpleDateFormat dayNameFormatter = new SimpleDateFormat("EEE", Locale.US);
 256         final SimpleDateFormat monthAndDayNumberormatter = new SimpleDateFormat("MMM d", Locale.US);
 257
 258
 259         // 4. Prepare data for UI.
 260         final List<OverviewEntry> entries = new ArrayList<OverviewEntry>();
 261         final OverviewAdapter adapter = new OverviewAdapter(this.getActivity(),
 262                 R.layout.weather_main_entry_list);
 263         final Calendar calendar = Calendar.getInstance();
 264         int count = mDayForecast;
 265         for (final com.weather.information.model.forecastweather.List forecast : forecastWeatherData
 266                 .getList()) {
 267
 268             Bitmap picture;
 269
 270             if ((forecast.getWeather().size() > 0) &&
 271                     (forecast.getWeather().get(0).getIcon() != null) &&
 272                     (IconsList.getIcon(forecast.getWeather().get(0).getIcon()) != null)) {
 273                 final String icon = forecast.getWeather().get(0).getIcon();
 274                 picture = BitmapFactory.decodeResource(this.getResources(), IconsList.getIcon(icon)
 275                         .getResourceDrawable());
 276             } else {
 277                 picture = BitmapFactory.decodeResource(this.getResources(),
 278                         R.drawable.weather_severe_alert);
 279             }
 280
 281             final Long forecastUNIXDate = (Long) forecast.getDt();
 282             calendar.setTimeInMillis(forecastUNIXDate * 1000L);
 283             final Date dayTime = calendar.getTime();
 284             final String dayTextName = dayNameFormatter.format(dayTime);
 285             final String monthAndDayNumberText = monthAndDayNumberormatter.format(dayTime);
 286
 287             Double maxTemp = null;
 288             if (forecast.getTemp().getMax() != null) {
 289                 maxTemp = (Double) forecast.getTemp().getMax();
 290                 maxTemp = unitsConversor.doConversion(maxTemp);
 291             }
 292
 293             Double minTemp = null;
 294             if (forecast.getTemp().getMin() != null) {
 295                 minTemp = (Double) forecast.getTemp().getMin();
 296                 minTemp = unitsConversor.doConversion(minTemp);
 297             }
 298
 299             if ((maxTemp != null) && (minTemp != null)) {
 300                 entries.add(new OverviewEntry(dayTextName, monthAndDayNumberText,
 301                         tempFormatter.format(maxTemp) + symbol, tempFormatter.format(minTemp) + symbol,
 302                         picture));
 303             }
 304
 305             count = count - 1;
 306             if (count == 0) {
 307                 break;
 308             }
 309         }
 310
 311
 312         // 5. Update UI.
 313         adapter.addAll(entries);
 314         this.setListAdapter(adapter);
 315     }
 316
 317     private boolean isDataFresh(final Date lastUpdate) {
 318         if (lastUpdate == null) {
 319                 return false;
 320         }
 321
 322         final SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(
 323                         this.getActivity().getApplicationContext());
 324         final String keyPreference = this.getString(R.string.weather_preferences_refresh_interval_key);
 325         final String refresh = sharedPreferences.getString(
 326                         keyPreference,
 327                         this.getResources().getStringArray(R.array.weather_preferences_refresh_interval)[0]);
 328         final Date currentTime = new Date();
 329         if (((currentTime.getTime() - lastUpdate.getTime())) < Long.valueOf(refresh)) {
 330                 return true;
 331         }
 332
 333         return false;
 334     }
 335
 336     private class OverviewTask extends AsyncTask<Object, Void, Forecast> {
 337         // Store the context passed to the AsyncTask when the system instantiates it.
 338         private final Context localContext;
 339         private final CustomHTTPClient HTTPClient;
 340         private final ServiceParser weatherService;
 341
 342         public OverviewTask(final Context context, final CustomHTTPClient HTTPClient,
 343                         final ServiceParser weatherService) {
 344                 this.localContext = context;
 345             this.HTTPClient = HTTPClient;
 346             this.weatherService = weatherService;
 347         }
 348
 349         @Override
 350         protected Forecast doInBackground(final Object... params) {
 351             final double latitude = (Double) params[0];
 352             final double longitude = (Double) params[1];
 353
 354             Forecast forecast = null;
 355
 356             try {
 357                 forecast = this.doInBackgroundThrowable(latitude, longitude);
 358             } catch (final JsonParseException e) {
 359                 Log.e(TAG, "OverviewTask doInBackground exception: ", e);
 360             } catch (final ClientProtocolException e) {
 361                 Log.e(TAG, "OverviewTask doInBackground exception: ", e);
 362             } catch (final MalformedURLException e) {
 363                 Log.e(TAG, "OverviewTask doInBackground exception: ", e);
 364             } catch (final URISyntaxException e) {
 365                 Log.e(TAG, "OverviewTask doInBackground exception: ", e);
 366             } catch (final IOException e) {
 367                 // logger infrastructure swallows UnknownHostException :/
 368                 Log.e(TAG, "OverviewTask doInBackground exception: " + e.getMessage(), e);
 369             } finally {
 370                 HTTPClient.close();
 371             }
 372
 373             return forecast;
 374         }
 375
 376         private Forecast doInBackgroundThrowable(final double latitude, final double longitude)
 377                         throws URISyntaxException, ClientProtocolException, JsonParseException, IOException {
 378
 379             final String APIVersion = localContext.getResources().getString(R.string.api_version);
 380             final String urlAPI = localContext.getResources().getString(R.string.uri_api_weather_forecast);
 381             // TODO: number as resource
 382             final String url = weatherService.createURIAPIForecast(urlAPI, APIVersion, latitude, longitude, "14");
 383             final String urlWithoutCache = url.concat("&time=" + System.currentTimeMillis());
 384             final String jsonData = HTTPClient.retrieveDataAsString(new URL(urlWithoutCache));
 385
 386             return weatherService.retrieveForecastFromJPOS(jsonData);
 387         }
 388
 389         @Override
 390         protected void onPostExecute(final Forecast forecast) {
 391
 392             // Call updateUI on the UI thread.
 393                 final Intent forecastData = new Intent("com.weather.information.UPDATEFORECAST");
 394                 forecastData.putExtra("forecast", forecast);
 395             LocalBroadcastManager.getInstance(this.localContext).sendBroadcastSync(forecastData);
 396         }
 397     }
 398 }