Java tutorial
/** * Copyright 2014 Gustavo Martin Morcuende * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package name.gumartinm.weather.information.notification; import java.io.IOException; import java.net.MalformedURLException; import java.net.URISyntaxException; import java.net.URL; import java.text.DecimalFormat; import java.text.NumberFormat; import java.util.Locale; import org.apache.http.client.ClientProtocolException; import android.app.IntentService; import android.app.Notification; import android.app.PendingIntent; import android.content.Intent; import android.content.SharedPreferences; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.net.http.AndroidHttpClient; import android.preference.PreferenceManager; import android.support.v4.app.NotificationCompat; import android.support.v4.app.NotificationManagerCompat; import android.support.v4.app.TaskStackBuilder; import android.widget.RemoteViews; import com.fasterxml.jackson.core.JsonParseException; import name.gumartinm.weather.information.R; import name.gumartinm.weather.information.activity.MainTabsActivity; import name.gumartinm.weather.information.httpclient.CustomHTTPClient; import name.gumartinm.weather.information.model.DatabaseQueries; import name.gumartinm.weather.information.model.WeatherLocation; import name.gumartinm.weather.information.model.currentweather.Current; import name.gumartinm.weather.information.parser.JPOSCurrentParser; import name.gumartinm.weather.information.service.IconsList; import name.gumartinm.weather.information.service.ServiceCurrentParser; import name.gumartinm.weather.information.service.conversor.TempUnitsConversor; import name.gumartinm.weather.information.service.conversor.UnitsConversor; import timber.log.Timber; public class NotificationIntentService extends IntentService { public NotificationIntentService() { super("NIS-Thread"); } @Override protected void onHandleIntent(final Intent intent) { final DatabaseQueries query = new DatabaseQueries(this.getApplicationContext()); final WeatherLocation weatherLocation = query.queryDataBase(); if (weatherLocation != null) { final ServiceCurrentParser weatherService = new ServiceCurrentParser(new JPOSCurrentParser()); final CustomHTTPClient HTTPClient = new CustomHTTPClient( AndroidHttpClient.newInstance(this.getString(R.string.http_client_agent))); Current current = null; try { current = this.doInBackgroundThrowable(weatherLocation, HTTPClient, weatherService); } catch (final JsonParseException e) { Timber.e(e, "doInBackground exception: "); } catch (final ClientProtocolException e) { Timber.e(e, "doInBackground exception: "); } catch (final MalformedURLException e) { Timber.e(e, "doInBackground exception: "); } catch (final URISyntaxException e) { Timber.e(e, "doInBackground exception: "); } catch (final IOException e) { // logger infrastructure swallows UnknownHostException :/ Timber.e(e, "doInBackground exception: " + e.getMessage()); } finally { HTTPClient.close(); } if (current != null) { this.showNotification(current, weatherLocation); } } } private Current doInBackgroundThrowable(final WeatherLocation weatherLocation, final CustomHTTPClient HTTPClient, final ServiceCurrentParser weatherService) throws ClientProtocolException, MalformedURLException, URISyntaxException, JsonParseException, IOException { final SharedPreferences sharedPreferences = PreferenceManager .getDefaultSharedPreferences(this.getApplicationContext()); final String APPID = sharedPreferences.getString(this.getString(R.string.weather_preferences_app_id_key), ""); final String APIVersion = this.getResources().getString(R.string.api_version); final String urlAPI = this.getResources().getString(R.string.uri_api_weather_today); String url = weatherService.createURIAPICurrent(urlAPI, APIVersion, weatherLocation.getLatitude(), weatherLocation.getLongitude()); if (!APPID.isEmpty()) { url = url.concat("&APPID=" + APPID); } final String jsonData = HTTPClient.retrieveDataAsString(new URL(url)); return weatherService.retrieveCurrentFromJPOS(jsonData); } private void showNotification(final Current current, final WeatherLocation weatherLocation) { // 1. Update units of measurement. final UnitsConversor tempUnitsConversor = new TempUnitsConversor(this.getApplicationContext()); // 2. Formatters final DecimalFormat tempFormatter = (DecimalFormat) NumberFormat.getNumberInstance(Locale.US); tempFormatter.applyPattern("###.##"); // 3. Prepare data for RemoteViews. String tempMax = ""; if (current.getMain().getTemp_max() != null) { double conversion = (Double) current.getMain().getTemp_max(); conversion = tempUnitsConversor.doConversion(conversion); tempMax = tempFormatter.format(conversion) + tempUnitsConversor.getSymbol(); } String tempMin = ""; if (current.getMain().getTemp_min() != null) { double conversion = (Double) current.getMain().getTemp_min(); conversion = tempUnitsConversor.doConversion(conversion); tempMin = tempFormatter.format(conversion) + tempUnitsConversor.getSymbol(); } Bitmap picture; if ((current.getWeather().size() > 0) && (current.getWeather().get(0).getIcon() != null) && (IconsList.getIcon(current.getWeather().get(0).getIcon()) != null)) { final String icon = current.getWeather().get(0).getIcon(); picture = BitmapFactory.decodeResource(this.getResources(), IconsList.getIcon(icon).getResourceDrawable()); } else { picture = BitmapFactory.decodeResource(this.getResources(), R.drawable.weather_severe_alert); } final String city = weatherLocation.getCity(); final String country = weatherLocation.getCountry(); // 4. Insert data in RemoteViews. final RemoteViews remoteView = new RemoteViews(this.getApplicationContext().getPackageName(), R.layout.weather_notification); remoteView.setImageViewBitmap(R.id.weather_notification_image, picture); remoteView.setTextViewText(R.id.weather_notification_temperature_max, tempMax); remoteView.setTextViewText(R.id.weather_notification_temperature_min, tempMin); remoteView.setTextViewText(R.id.weather_notification_city, city); remoteView.setTextViewText(R.id.weather_notification_country, country); // 5. Activity launcher. final Intent resultIntent = new Intent(this.getApplicationContext(), MainTabsActivity.class); // The PendingIntent to launch our activity if the user selects this notification. // The stack builder object will contain an artificial back stack for the started Activity. // This ensures that navigating backward from the Activity leads out of // your application to the Home screen. final TaskStackBuilder stackBuilder = TaskStackBuilder.create(this.getApplicationContext()); // Adds the back stack for the Intent (but not the Intent itself) stackBuilder.addParentStack(MainTabsActivity.class); // Adds the Intent that starts the Activity to the top of the stack stackBuilder.addNextIntent(resultIntent); final PendingIntent resultPendingIntent = stackBuilder.getPendingIntent(0, PendingIntent.FLAG_UPDATE_CURRENT); final NotificationManagerCompat notificationManager = NotificationManagerCompat .from(this.getApplicationContext()); // 6. Create notification. final NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder( this.getApplicationContext()).setContent(remoteView).setSmallIcon(R.drawable.ic_launcher) .setAutoCancel(true).setLocalOnly(true).setWhen(System.currentTimeMillis()) .setContentIntent(resultPendingIntent).setPriority(NotificationCompat.PRIORITY_DEFAULT); final Notification notification = notificationBuilder.build(); notification.flags |= Notification.FLAG_AUTO_CANCEL; // Send the notification. // Sets an ID for the notification, so it can be updated (just in case) int notifyID = 1; notificationManager.notify(notifyID, notification); } }