public static Alarm calculateNextAlert(final Context context) {
Alarm alarm = null;
long minTime = Long.MAX_VALUE;
long now = System.currentTimeMillis();
Cursor cursor = getFilteredAlarmsCursor(context.getContentResolver());
if (cursor != null) {
if (cursor.moveToFirst()) {
do {
Alarm a = new Alarm(cursor);
// A time of 0 indicates this is a repeating alarm, so
// calculate the time to get the next alert.
if (a.time == 0) {
a.time = calculateAlarm(a);
} else if (a.time < now) {
// Expired alarm, disable it and move along.
enableAlarmInternal(context, a, false);
continue;
}
if (a.time < minTime) {
minTime = a.time;
alarm = a;
}
} while (cursor.moveToNext());
}
cursor.close();
}
return alarm;
}
/** Disables non-repeating alarms that have passed. Called at boot. */
public static void disableExpiredAlarms(final Context context) {
Cursor cur = getFilteredAlarmsCursor(context.getContentResolver());
long now = System.currentTimeMillis();
boolean status = false;
if (cur.moveToFirst()) {
do {
Alarm alarm = new Alarm(cur);
// A time of 0 means this alarm repeats. If the time is
// non-zero, check if the time is before now.
if (alarm.time != 0 && alarm.time < now) {
enableAlarmInternal(context, alarm, false);
} else {
status = true;
}
} while (cur.moveToNext());
}
cur.close();
if (status) setStatusBarIcon(context, true);
}
private static void enableAlarmInternal(final Context context, final int id, boolean enabled) {
enableAlarmInternal(context, getAlarm(context.getContentResolver(), id), enabled);
}
/**
* A convenience method to enable or disable an alarm.
*
* @param id corresponds to the _id column
* @param enabled corresponds to the ENABLED column
*/
public static void enableAlarm(final Context context, final int id, boolean enabled) {
enableAlarmInternal(context, id, enabled);
setNextAlert(context);
}