git.gumartinm.name Git - JavaForFun/blob

   1 package de.example.exampletdd.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
  38 import de.example.exampletdd.R;
  39 import de.example.exampletdd.fragment.specific.SpecificFragment;
  40 import de.example.exampletdd.httpclient.CustomHTTPClient;
  41 import de.example.exampletdd.model.DatabaseQueries;
  42 import de.example.exampletdd.model.WeatherLocation;
  43 import de.example.exampletdd.model.forecastweather.Forecast;
  44 import de.example.exampletdd.parser.JPOSWeatherParser;
  45 import de.example.exampletdd.service.IconsList;
  46 import de.example.exampletdd.service.PermanentStorage;
  47 import de.example.exampletdd.service.ServiceParser;
  48
  49 public class OverviewFragment extends ListFragment {
  50     private static final String TAG = "OverviewFragment";
  51     private BroadcastReceiver mReceiver;
  52
  53     @Override
  54     public void onCreate(final Bundle savedInstanceState) {
  55         super.onCreate(savedInstanceState);
  56     }
  57
  58     @Override
  59     public void onActivityCreated(final Bundle savedInstanceState) {
  60         super.onActivityCreated(savedInstanceState);
  61
  62         final ListView listWeatherView = this.getListView();
  63         listWeatherView.setChoiceMode(ListView.CHOICE_MODE_NONE);
  64
  65         if (savedInstanceState != null) {
  66             // Restore UI state
  67             final Forecast forecast = (Forecast) savedInstanceState.getSerializable("Forecast");
  68
  69             // TODO: Could it be better to store in global forecast data even if it is null value?
  70             //       So, perhaps do not check for null value and always store in global variable.
  71             if (forecast != null) {
  72                 final PermanentStorage store = new PermanentStorage(this.getActivity().getApplicationContext());
  73                 store.saveForecast(forecast);
  74             }
  75         }
  76
  77         this.setHasOptionsMenu(false);
  78
  79         this.setEmptyText(this.getString(R.string.text_field_remote_error));
  80         this.setListShownNoAnimation(false);
  81     }
  82
  83     @Override
  84     public void onResume() {
  85         super.onResume();
  86
  87         this.mReceiver = new BroadcastReceiver() {
  88
  89                         @Override
  90                         public void onReceive(final Context context, final Intent intent) {
  91                                 final String action = intent.getAction();
  92                                 if (action.equals("de.example.exampletdd.UPDATEFORECAST")) {
  93                                         final Forecast forecastRemote = (Forecast) intent.getSerializableExtra("forecast");
  94
  95                                         if (forecastRemote != null) {
  96
  97                                                 // 1. Check conditions. They must be the same as the ones that triggered the AsyncTask.
  98                                                 final DatabaseQueries query = new DatabaseQueries(context.getApplicationContext());
  99                                     final WeatherLocation weatherLocation = query.queryDataBase();
 100                                     final PermanentStorage store = new PermanentStorage(context.getApplicationContext());
 101                                     final Forecast forecast = store.getForecast();
 102
 103                                         if (forecast == null || !OverviewFragment.this.isDataFresh(weatherLocation.getLastForecastUIUpdate())) {
 104                                                 // 2. Update UI.
 105                                                 OverviewFragment.this.updateUI(forecastRemote);
 106
 107                                                 // 3. Update Data.
 108                                                 store.saveForecast(forecastRemote);
 109                                             weatherLocation.setLastForecastUIUpdate(new Date());
 110                                             query.updateDataBase(weatherLocation);
 111
 112                                             // 4. Show list.
 113                                             OverviewFragment.this.setListShownNoAnimation(true);
 114                                         }
 115
 116                                         } else {
 117                                                 // Empty list and show error message (see setEmptyText in onCreate)
 118                                                 OverviewFragment.this.setListAdapter(null);
 119                                                 OverviewFragment.this.setListShownNoAnimation(true);
 120                                         }
 121                                 }
 122                         }
 123         };
 124
 125         // Register receiver
 126         final IntentFilter filter = new IntentFilter();
 127         filter.addAction("de.example.exampletdd.UPDATEFORECAST");
 128         LocalBroadcastManager.getInstance(this.getActivity().getApplicationContext())
 129                                                         .registerReceiver(this.mReceiver, filter);
 130
 131         final DatabaseQueries query = new DatabaseQueries(this.getActivity().getApplicationContext());
 132         final WeatherLocation weatherLocation = query.queryDataBase();
 133         if (weatherLocation == null) {
 134             // Nothing to do.
 135                 // Empty list and show error message (see setEmptyText in onCreate)
 136                         this.setListAdapter(null);
 137                         this.setListShownNoAnimation(true);
 138             return;
 139         }
 140
 141         final PermanentStorage store = new PermanentStorage(this.getActivity().getApplicationContext());
 142         final Forecast forecast = store.getForecast();
 143
 144         // TODO: store forecast data in permanent storage and check here if there is data in permanent storage
 145         if (forecast != null && this.isDataFresh(weatherLocation.getLastForecastUIUpdate())) {
 146             this.updateUI(forecast);
 147         } else {
 148             // Load remote data (aynchronous)
 149             // Gets the data from the web.
 150             this.setListShownNoAnimation(false);
 151             final OverviewTask task = new OverviewTask(
 152                         this.getActivity().getApplicationContext(),
 153                     new CustomHTTPClient(AndroidHttpClient.newInstance("Android 4.3 WeatherInformation Agent")),
 154                     new ServiceParser(new JPOSWeatherParser()));
 155
 156             task.execute(weatherLocation.getLatitude(), weatherLocation.getLongitude());
 157         }
 158     }
 159
 160     @Override
 161     public void onSaveInstanceState(final Bundle savedInstanceState) {
 162
 163         // Save UI state
 164         final PermanentStorage store = new PermanentStorage(this.getActivity().getApplicationContext());
 165         final Forecast forecast = store.getForecast();
 166
 167         // TODO: Could it be better to save forecast data even if it is null value?
 168         //       So, perhaps do not check for null value.
 169         if (forecast != null) {
 170             savedInstanceState.putSerializable("Forecast", forecast);
 171         }
 172
 173         super.onSaveInstanceState(savedInstanceState);
 174     }
 175
 176     @Override
 177     public void onPause() {
 178         LocalBroadcastManager.getInstance(this.getActivity().getApplicationContext()).unregisterReceiver(this.mReceiver);
 179
 180         super.onPause();
 181     }
 182
 183     @Override
 184     public void onListItemClick(final ListView l, final View v, final int position, final long id) {
 185         final SpecificFragment fragment = (SpecificFragment) this
 186                 .getFragmentManager().findFragmentById(R.id.weather_specific_fragment);
 187         if (fragment == null) {
 188             // handset layout
 189             final Intent intent = new Intent("de.example.exampletdd.WEATHERINFO")
 190             .setComponent(new ComponentName("de.example.exampletdd",
 191                     "de.example.exampletdd.SpecificActivity"));
 192             intent.putExtra("CHOSEN_DAY", (int) id);
 193             OverviewFragment.this.getActivity().startActivity(intent);
 194         } else {
 195             // tablet layout
 196             fragment.updateUIByChosenDay((int) id);
 197         }
 198     }
 199
 200     private interface UnitsConversor {
 201
 202         public double doConversion(final double value);
 203     }
 204
 205     private void updateUI(final Forecast forecastWeatherData) {
 206
 207         final SharedPreferences sharedPreferences = PreferenceManager
 208                 .getDefaultSharedPreferences(this.getActivity().getApplicationContext());
 209
 210         // TODO: repeating the same code in Overview, Specific and Current!!!
 211         // 1. Update units of measurement.
 212         String symbol;
 213         UnitsConversor unitsConversor;
 214         String keyPreference = this.getResources().getString(
 215                 R.string.weather_preferences_temperature_key);
 216         final String[] values = this.getResources().getStringArray(R.array.weather_preferences_temperature);
 217         final String unitsPreferenceValue = sharedPreferences.getString(
 218                 keyPreference, this.getString(R.string.weather_preferences_temperature_celsius));
 219         if (unitsPreferenceValue.equals(values[0])) {
 220                 symbol = values[0];
 221                 unitsConversor = new UnitsConversor(){
 222
 223                                 @Override
 224                                 public double doConversion(final double value) {
 225                                         return value - 273.15;
 226                                 }
 227
 228                 };
 229         } else if (unitsPreferenceValue.equals(values[1])) {
 230                 symbol = values[1];
 231                 unitsConversor = new UnitsConversor(){
 232
 233                                 @Override
 234                                 public double doConversion(final double value) {
 235                                         return (value * 1.8) - 459.67;
 236                                 }
 237
 238                 };
 239         } else {
 240                 symbol = values[2];
 241                 unitsConversor = new UnitsConversor(){
 242
 243                                 @Override
 244                                 public double doConversion(final double value) {
 245                                         return value;
 246                                 }
 247
 248                 };
 249         }
 250
 251
 252         // 2. Update number day forecast.
 253         keyPreference = this.getResources().getString(R.string.weather_preferences_day_forecast_key);
 254         final String dayForecast = sharedPreferences.getString(keyPreference, "5");
 255         final int mDayForecast = Integer.valueOf(dayForecast);
 256
 257
 258         // 3. Formatters
 259         final DecimalFormat tempFormatter = (DecimalFormat) NumberFormat.getNumberInstance(Locale.US);
 260         tempFormatter.applyPattern("#####.##");
 261         final SimpleDateFormat dayNameFormatter = new SimpleDateFormat("EEE", Locale.US);
 262         final SimpleDateFormat monthAndDayNumberormatter = new SimpleDateFormat("MMM d", Locale.US);
 263
 264
 265         // 4. Prepare data for UI.
 266         final List<OverviewEntry> entries = new ArrayList<OverviewEntry>();
 267         final OverviewAdapter adapter = new OverviewAdapter(this.getActivity(),
 268                 R.layout.weather_main_entry_list);
 269         final Calendar calendar = Calendar.getInstance();
 270         int count = mDayForecast;
 271         for (final de.example.exampletdd.model.forecastweather.List forecast : forecastWeatherData
 272                 .getList()) {
 273
 274             Bitmap picture;
 275
 276             if ((forecast.getWeather().size() > 0) &&
 277                     (forecast.getWeather().get(0).getIcon() != null) &&
 278                     (IconsList.getIcon(forecast.getWeather().get(0).getIcon()) != null)) {
 279                 final String icon = forecast.getWeather().get(0).getIcon();
 280                 picture = BitmapFactory.decodeResource(this.getResources(), IconsList.getIcon(icon)
 281                         .getResourceDrawable());
 282             } else {
 283                 picture = BitmapFactory.decodeResource(this.getResources(),
 284                         R.drawable.weather_severe_alert);
 285             }
 286
 287             final Long forecastUNIXDate = (Long) forecast.getDt();
 288             calendar.setTimeInMillis(forecastUNIXDate * 1000L);
 289             final Date dayTime = calendar.getTime();
 290             final String dayTextName = dayNameFormatter.format(dayTime);
 291             final String monthAndDayNumberText = monthAndDayNumberormatter.format(dayTime);
 292
 293             Double maxTemp = null;
 294             if (forecast.getTemp().getMax() != null) {
 295                 maxTemp = (Double) forecast.getTemp().getMax();
 296                 maxTemp = unitsConversor.doConversion(maxTemp);
 297             }
 298
 299             Double minTemp = null;
 300             if (forecast.getTemp().getMin() != null) {
 301                 minTemp = (Double) forecast.getTemp().getMin();
 302                 minTemp = unitsConversor.doConversion(minTemp);
 303             }
 304
 305             if ((maxTemp != null) && (minTemp != null)) {
 306                 entries.add(new OverviewEntry(dayTextName, monthAndDayNumberText,
 307                         tempFormatter.format(maxTemp) + symbol, tempFormatter.format(minTemp) + symbol,
 308                         picture));
 309             }
 310
 311             count = count - 1;
 312             if (count == 0) {
 313                 break;
 314             }
 315         }
 316
 317
 318         // 5. Update UI.
 319         adapter.addAll(entries);
 320         this.setListAdapter(adapter);
 321     }
 322
 323     private boolean isDataFresh(final Date lastUpdate) {
 324         if (lastUpdate == null) {
 325                 return false;
 326         }
 327
 328         final SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(
 329                         this.getActivity().getApplicationContext());
 330         final String keyPreference = this.getString(R.string.weather_preferences_refresh_interval_key);
 331         final String refresh = sharedPreferences.getString(
 332                         keyPreference,
 333                         this.getResources().getStringArray(R.array.weather_preferences_refresh_interval)[0]);
 334         final Date currentTime = new Date();
 335         if (((currentTime.getTime() - lastUpdate.getTime())) < Long.valueOf(refresh)) {
 336                 return true;
 337         }
 338
 339         return false;
 340     }
 341
 342     private class OverviewTask extends AsyncTask<Object, Void, Forecast> {
 343         // Store the context passed to the AsyncTask when the system instantiates it.
 344         private final Context localContext;
 345         private final CustomHTTPClient HTTPClient;
 346         private final ServiceParser weatherService;
 347
 348         public OverviewTask(final Context context, final CustomHTTPClient HTTPClient,
 349                         final ServiceParser weatherService) {
 350                 this.localContext = context;
 351             this.HTTPClient = HTTPClient;
 352             this.weatherService = weatherService;
 353         }
 354
 355         @Override
 356         protected Forecast doInBackground(final Object... params) {
 357             final double latitude = (Double) params[0];
 358             final double longitude = (Double) params[1];
 359
 360             Forecast forecast = null;
 361
 362             try {
 363                 forecast = this.doInBackgroundThrowable(latitude, longitude);
 364             } catch (final JsonParseException e) {
 365                 Log.e(TAG, "OverviewTask doInBackground exception: ", e);
 366             } catch (final ClientProtocolException e) {
 367                 Log.e(TAG, "OverviewTask doInBackground exception: ", e);
 368             } catch (final MalformedURLException e) {
 369                 Log.e(TAG, "OverviewTask doInBackground exception: ", e);
 370             } catch (final URISyntaxException e) {
 371                 Log.e(TAG, "OverviewTask doInBackground exception: ", e);
 372             } catch (final IOException e) {
 373                 // logger infrastructure swallows UnknownHostException :/
 374                 Log.e(TAG, "OverviewTask doInBackground exception: " + e.getMessage(), e);
 375             } finally {
 376                 HTTPClient.close();
 377             }
 378
 379             return forecast;
 380         }
 381
 382         private Forecast doInBackgroundThrowable(final double latitude, final double longitude)
 383                         throws URISyntaxException, ClientProtocolException, JsonParseException, IOException {
 384
 385             final String APIVersion = localContext.getResources().getString(R.string.api_version);
 386             final String urlAPI = localContext.getResources().getString(R.string.uri_api_weather_forecast);
 387             // TODO: number as resource
 388             final String url = weatherService.createURIAPIForecast(urlAPI, APIVersion, latitude, longitude, "14");
 389             final String urlWithoutCache = url.concat("&time=" + System.currentTimeMillis());
 390             final String jsonData = HTTPClient.retrieveDataAsString(new URL(urlWithoutCache));
 391
 392             return weatherService.retrieveForecastFromJPOS(jsonData);
 393         }
 394
 395         @Override
 396         protected void onPostExecute(final Forecast forecast) {
 397
 398             // Call updateUI on the UI thread.
 399                 final Intent forecastData = new Intent("de.example.exampletdd.UPDATEFORECAST");
 400                 forecastData.putExtra("forecast", forecast);
 401             LocalBroadcastManager.getInstance(this.localContext).sendBroadcastSync(forecastData);
 402         }
 403     }
 404 }