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Apache License
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package app.sunshine.juanjo.sync; /*www .jav a2s .c om*/ import android.accounts.Account; import android.accounts.AccountManager; import android.app.NotificationManager; import android.app.PendingIntent; import android.content.AbstractThreadedSyncAdapter; import android.content.ContentProviderClient; import android.content.ContentResolver; import android.content.ContentUris; import android.content.ContentValues; import android.content.Context; import android.content.Intent; import android.content.SharedPreferences; import android.content.SyncRequest; import android.content.SyncResult; import android.database.Cursor; import android.net.Uri; import android.os.Build; import android.os.Bundle; import android.preference.PreferenceManager; import android.support.v4.app.NotificationCompat; import android.support.v4.app.TaskStackBuilder; import android.util.Log; 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.util.Calendar; import java.util.Date; import java.util.Vector; import app.sunshine.juanjo.R; import app.sunshine.juanjo.util.Utility; import app.sunshine.juanjo.util.WeatherContract; import app.sunshine.juanjo.util.WeatherContract.WeatherEntry; import app.sunshine.juanjo.views.activities.MainActivity; /** * Created by juanjo on 29/08/14. */ public class SunshineSyncAdapter extends AbstractThreadedSyncAdapter { private final String LOG_TAG = SunshineSyncAdapter.class.getSimpleName(); // Interval at which to sync with the weather, in milliseconds. // 60 seconds (1 minute) * 180 = 3 hours public static final int SYNC_INTERVAL = 60 * 180; public static final int SYNC_FLEXTIME = SYNC_INTERVAL / 3; private static final long DAY_IN_MILLIS = 1000 * 60 * 60 * 24; private static final int WEATHER_NOTIFICATION_ID = 3004; private static final String[] NOTIFY_WEATHER_PROJECTION = new String[] { WeatherEntry.COLUMN_WEATHER_ID, WeatherEntry.COLUMN_MAX_TEMP, WeatherEntry.COLUMN_MIN_TEMP, WeatherEntry.COLUMN_SHORT_DESC }; // these indices must match the projection private static final int INDEX_WEATHER_ID = 0; private static final int INDEX_MAX_TEMP = 1; private static final int INDEX_MIN_TEMP = 2; private static final int INDEX_SHORT_DESC = 3; public SunshineSyncAdapter(Context context, boolean autoInitialize) { super(context, autoInitialize); } @Override public void onPerformSync(Account account, Bundle extras, String authority, ContentProviderClient provider, SyncResult syncResult) { System.out.println("=> OnPerformSync"); String locationQuery = Utility.getPreferredLocation(getContext()); // 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 = null; String format = "json"; String units = "metric"; int numDays = 14; 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, locationQuery) .appendQueryParameter(FORMAT_PARAM, format) .appendQueryParameter(UNITS_PARAM, units) .appendQueryParameter(DAYS_PARAM, Integer.toString(numDays)).build(); URL url = new URL(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; } 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; } forecastJsonStr = buffer.toString(); } catch (IOException e) { Log.e(LOG_TAG, "Error ", e); // If the code didn't successfully get the weather data, there's no // point in attemping // to parse it. return; } finally { if (urlConnection != null) { urlConnection.disconnect(); } if (reader != null) { try { reader.close(); } catch (final IOException e) { Log.e(LOG_TAG, "Error closing stream", e); } } } try { getWeatherDataFromJson(forecastJsonStr, numDays, locationQuery); } catch (JSONException e) { Log.e(LOG_TAG, e.getMessage(), e); e.printStackTrace(); } // This will only happen if there was an error getting or parsing the // forecast. return; } /** * 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. * * Fortunately parsing is easy: constructor takes the JSON string and * converts it into an Object hierarchy for us. */ private void getWeatherDataFromJson(String forecastJsonStr, int numDays, String locationSetting) throws JSONException { // These are the names of the JSON objects that need to be extracted. // Location information final String OWM_CITY = "city"; final String OWM_CITY_NAME = "name"; final String OWM_COORD = "coord"; final String OWM_COORD_LAT = "lat"; final String OWM_COORD_LONG = "lon"; // Weather information. Each day's forecast info is an element of the // "list" array. final String OWM_LIST = "list"; final String OWM_DATETIME = "dt"; final String OWM_PRESSURE = "pressure"; final String OWM_HUMIDITY = "humidity"; final String OWM_WINDSPEED = "speed"; final String OWM_WIND_DIRECTION = "deg"; // All temperatures are children of the "temp" object. final String OWM_TEMPERATURE = "temp"; final String OWM_MAX = "max"; final String OWM_MIN = "min"; final String OWM_WEATHER = "weather"; final String OWM_DESCRIPTION = "main"; final String OWM_WEATHER_ID = "id"; JSONObject forecastJson = new JSONObject(forecastJsonStr); JSONArray weatherArray = forecastJson.getJSONArray(OWM_LIST); JSONObject cityJson = forecastJson.getJSONObject(OWM_CITY); String cityName = cityJson.getString(OWM_CITY_NAME); JSONObject coordJSON = cityJson.getJSONObject(OWM_COORD); double cityLatitude = coordJSON.getLong(OWM_COORD_LAT); double cityLongitude = coordJSON.getLong(OWM_COORD_LONG); Log.v(LOG_TAG, cityName + ", with coord: " + cityLatitude + " " + cityLongitude); // Insert the location into the database. long locationID = addLocation(locationSetting, cityName, cityLatitude, cityLongitude); // Get and insert the new weather information into the database Vector<ContentValues> cVVector = new Vector<ContentValues>(weatherArray.length()); for (int i = 0; i < weatherArray.length(); i++) { // These are the values that will be collected. long dateTime; double pressure; int humidity; double windSpeed; double windDirection; double high; double low; String description; int weatherId; // 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". dateTime = dayForecast.getLong(OWM_DATETIME); pressure = dayForecast.getDouble(OWM_PRESSURE); humidity = dayForecast.getInt(OWM_HUMIDITY); windSpeed = dayForecast.getDouble(OWM_WINDSPEED); windDirection = dayForecast.getDouble(OWM_WIND_DIRECTION); // Description is in a child array called "weather", which is 1 // element long. // That element also contains a weather code. JSONObject weatherObject = dayForecast.getJSONArray(OWM_WEATHER).getJSONObject(0); description = weatherObject.getString(OWM_DESCRIPTION); weatherId = weatherObject.getInt(OWM_WEATHER_ID); // 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); high = temperatureObject.getDouble(OWM_MAX); low = temperatureObject.getDouble(OWM_MIN); ContentValues weatherValues = new ContentValues(); weatherValues.put(WeatherContract.WeatherEntry.COLUMN_LOC_KEY, locationID); weatherValues.put(WeatherContract.WeatherEntry.COLUMN_DATETEXT, WeatherContract.getDbDateString(new Date(dateTime * 1000L))); weatherValues.put(WeatherContract.WeatherEntry.COLUMN_HUMIDITY, humidity); weatherValues.put(WeatherContract.WeatherEntry.COLUMN_PRESSURE, pressure); weatherValues.put(WeatherContract.WeatherEntry.COLUMN_WIND_SPEED, windSpeed); weatherValues.put(WeatherContract.WeatherEntry.COLUMN_DEGREES, windDirection); weatherValues.put(WeatherContract.WeatherEntry.COLUMN_MAX_TEMP, high); weatherValues.put(WeatherContract.WeatherEntry.COLUMN_MIN_TEMP, low); weatherValues.put(WeatherContract.WeatherEntry.COLUMN_SHORT_DESC, description); weatherValues.put(WeatherContract.WeatherEntry.COLUMN_WEATHER_ID, weatherId); cVVector.add(weatherValues); } if (cVVector.size() > 0) { ContentValues[] cvArray = new ContentValues[cVVector.size()]; cVVector.toArray(cvArray); getContext().getContentResolver().bulkInsert(WeatherContract.WeatherEntry.CONTENT_URI, cvArray); Calendar cal = Calendar.getInstance(); // Get's a calendar object // with the current time. cal.add(Calendar.DATE, -1); // Signifies yesterday's date String yesterdayDate = WeatherContract.getDbDateString(cal.getTime()); getContext().getContentResolver().delete(WeatherEntry.CONTENT_URI, WeatherEntry.COLUMN_DATETEXT + " <= ?", new String[] { yesterdayDate }); notifyWeather(); } } /** * Helper method to handle insertion of a new location in the weather * database. * * @param locationSetting * The location string used to request updates from the server. * @param cityName * A human-readable city name, e.g "Mountain View" * @param lat * the latitude of the city * @param lon * the longitude of the city * @return the row ID of the added location. */ private long addLocation(String locationSetting, String cityName, double lat, double lon) { // First, check if the location with this city name exists in the db Cursor cursor = getContext().getContentResolver().query( WeatherContract.LocationEntry.CONTENT_URI, new String[] { WeatherContract.LocationEntry._ID }, WeatherContract.LocationEntry.COLUMN_LOCATION_SETTING + " = ?", new String[] { locationSetting }, null); if (cursor.moveToFirst()) { int locationIdIndex = cursor.getColumnIndex(WeatherContract.LocationEntry._ID); return cursor.getLong(locationIdIndex); } else { ContentValues locationValues = new ContentValues(); locationValues.put(WeatherContract.LocationEntry.COLUMN_LOCATION_SETTING, locationSetting); locationValues.put(WeatherContract.LocationEntry.COLUMN_CITY, cityName); locationValues.put(WeatherContract.LocationEntry.COLUMN_LATITUDE, lat); locationValues.put(WeatherContract.LocationEntry.COLUMN_LONGITUDE, lon); Uri locationInsertUri = getContext().getContentResolver().insert( WeatherContract.LocationEntry.CONTENT_URI, locationValues); return ContentUris.parseId(locationInsertUri); } } /** * Helper method to have the sync adapter sync immediately * * @param context * The context used to access the account service */ public static void syncImmediately(Context context) { Bundle bundle = new Bundle(); bundle.putBoolean(ContentResolver.SYNC_EXTRAS_EXPEDITED, true); bundle.putBoolean(ContentResolver.SYNC_EXTRAS_MANUAL, true); ContentResolver.requestSync(getSyncAccount(context), context.getString(R.string.content_authority), bundle); } /** * Helper method to get the fake account to be used with SyncAdapter, or * make a new one if the fake account doesn't exist yet. If we make a new * account, we call the onAccountCreated method so we can initialize things. * * @param context * The context used to access the account service * @return a fake account. */ public static Account getSyncAccount(Context context) { // Get an instance of the Android account manager AccountManager accountManager = (AccountManager) context .getSystemService(Context.ACCOUNT_SERVICE); // Create the account type and default account Account newAccount = new Account(context.getString(R.string.app_name), context.getString(R.string.sync_account_type)); // If the password doesn't exist, the account doesn't exist if (null == accountManager.getPassword(newAccount)) { /* * Add the account and account type, no password or user data If * successful, return the Account object, otherwise report an error. */ if (!accountManager.addAccountExplicitly(newAccount, "", null)) { return null; } /* * If you don't set android:syncable="true" in in your <provider> * element in the manifest, then call * ContentResolver.setIsSyncable(account, AUTHORITY, 1) here. */ onAccountCreated(newAccount, context); } return newAccount; } /** * Helper method to schedule the sync adapter periodic execution */ public static void configurePeriodicSync(Context context, int syncInterval, int flexTime) { Account account = getSyncAccount(context); String authority = context.getString(R.string.content_authority); if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) { // we can enable inexact timers in our periodic sync SyncRequest request = new SyncRequest.Builder().syncPeriodic(syncInterval, flexTime) .setSyncAdapter(account, authority).build(); ContentResolver.requestSync(request); } else { ContentResolver.addPeriodicSync(account, authority, new Bundle(), syncInterval); } } private static void onAccountCreated(Account newAccount, Context context) { /* * Since we've created an account */ SunshineSyncAdapter.configurePeriodicSync(context, SYNC_INTERVAL, SYNC_FLEXTIME); /* * Without calling setSyncAutomatically, our periodic sync will not be * enabled. */ ContentResolver.setSyncAutomatically(newAccount, context.getString(R.string.content_authority), true); /* * Finally, let's do a sync to get things started */ syncImmediately(context); } public static void initializeSyncAdapter(Context context) { getSyncAccount(context); } private void notifyWeather() { Context context = getContext(); SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context); String displayNotificationsKey = context.getString(R.string.pref_enable_notifications_key); boolean displayNotifications = prefs .getBoolean(displayNotificationsKey, Boolean.parseBoolean(context .getString(R.string.pref_enable_notifications_default))); if (displayNotifications) { // checking the last update and notify if it' the first of the day String lastNotificationKey = context.getString(R.string.pref_last_notification); long lastSync = prefs.getLong(lastNotificationKey, 0); if (System.currentTimeMillis() - lastSync >= DAY_IN_MILLIS) { // Last sync was more than 1 day ago, let's send a notification // with // the weather. String locationQuery = Utility.getPreferredLocation(context); Uri weatherUri = WeatherEntry.buildWeatherLocationWithDate(locationQuery, WeatherContract.getDbDateString(new Date())); // we'll query our contentProvider, as always Cursor cursor = context.getContentResolver().query(weatherUri, NOTIFY_WEATHER_PROJECTION, null, null, null); if (cursor.moveToFirst()) { int weatherId = cursor.getInt(INDEX_WEATHER_ID); double high = cursor.getDouble(INDEX_MAX_TEMP); double low = cursor.getDouble(INDEX_MIN_TEMP); String desc = cursor.getString(INDEX_SHORT_DESC); int iconId = Utility.getIconResourceForWeatherCondition(weatherId); String title = context.getString(R.string.app_name); // Define the text of the forecast. String contentText = String.format( context.getString(R.string.format_notification), desc, Utility.formatTemperature(context, high, Utility.isMetric(context)), Utility.formatTemperature(context, low, Utility.isMetric(context))); // build your notification here. createNotification(context, iconId, title, contentText); // refreshing last sync SharedPreferences.Editor editor = prefs.edit(); editor.putLong(lastNotificationKey, System.currentTimeMillis()); editor.commit(); } } } } private void createNotification(Context context, int iconId, String title, String contentText) { // NotificationCompatBuilder is a very convenient way to build // backward-compatible // notifications. Just throw in some data. NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(getContext()) .setSmallIcon(iconId).setContentTitle(title).setContentText(contentText); // Make something interesting happen when the user clicks on the // notification. // In this case, opening the app is sufficient. Intent resultIntent = new Intent(context, MainActivity.class); // 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. TaskStackBuilder stackBuilder = TaskStackBuilder.create(context); stackBuilder.addNextIntent(resultIntent); PendingIntent resultPendingIntent = stackBuilder.getPendingIntent(0, PendingIntent.FLAG_UPDATE_CURRENT); mBuilder.setContentIntent(resultPendingIntent); NotificationManager mNotificationManager = (NotificationManager) getContext() .getSystemService(Context.NOTIFICATION_SERVICE); // WEATHER_NOTIFICATION_ID allows you to update the notification later // on. mNotificationManager.notify(WEATHER_NOTIFICATION_ID, mBuilder.build()); } }