6.06 Notifications Quiz

SunshineSyncAdapter.java

    private void notifyWeather() {
        Context context = getContext();
        //checking the last update and notify if it' the first of the day
        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
        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 = WeatherContract.WeatherEntry.buildWeatherLocationWithDate(locationQuery, System.currentTimeMillis());

            // 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.formatTemperature(context, low));

                //build your notification here.


                //refreshing last sync
                SharedPreferences.Editor editor = prefs.edit();
                editor.putLong(lastNotificationKey, System.currentTimeMillis());
                editor.commit();
            }
        }

    }

@ToanNV
or you can only overload this method in Utility class as
public static String formatTemperature(Context context, double temperature) {
return formatTemperature(context, temperature, isMetric(context));
}

Instead of checking wether the notification has been shown today, I would check if it has been dismissed by using Dismiss PendingIntent, so the notification can be showed again after the phone reboots (which is often needed on Android 5.0 with memory leaks…)

Instead of declaring a variable for SharedPreferences.Editor(), you can string the methods together from an existing SharedPreferences object.
I've forked for you.

prefs.edit()
    .putLong(lastNotificationKey, System.currentTimeMillis())
    .commit();

Shouldn't the cursor returned by ContentResolver.query( ) be closed?

@arthur7257 Yes, it should!

Just a small comment... the line
private static final long DAY_IN_MILLIS = 1000 * 60 * 60 * 24;
can be replaced by convenience static method for getting length of time unit in milliseconds in TimeUnit class:
private final static long DAY_IN_MILLIS = TimeUnit.DAYS.toMillis(1);