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