Sample Android Job Scheduling

SampleJob.java

public static int scheduleFirstAt(int aDay, int hours, int mins) {
  
        int jobID = -1;

        long startMs = 0L, endMs = 0L;
        int MARGIN_TIME = 30;

        // Current Day
        DateTime currentDay = new DateTime();

        // Reminder Day
        Calendar cal = Calendar.getInstance();
        cal.set(Calendar.HOUR_OF_DAY, hours);
        cal.set(Calendar.MINUTE, mins);
        DateTime reminderDay = new DateTime(cal);

        // Monday = 1 -> Sunday = 7
        if (aDay >= currentDay.getDayOfWeek())
        {
            int diffInDays = aDay - currentDay.getDayOfWeek();
            reminderDay = reminderDay.plusDays(diffInDays);

            startMs = reminderDay.getMillis() - System.currentTimeMillis();
            endMs = reminderDay.plusMinutes(MARGIN_TIME).getMillis() - System.currentTimeMillis();
        }
        else
        {
            int diffInDays = (7 - currentDay.getDayOfWeek()) + aDay;
            reminderDay = reminderDay.plusDays(diffInDays);

            startMs = reminderDay.getMillis() - System.currentTimeMillis();
            endMs = reminderDay.plusMinutes(MARGIN_TIME).getMillis() - System.currentTimeMillis();
        }


        PersistableBundleCompat extras = new PersistableBundleCompat();
        extras.putInt("day", aDay);
        extras.putInt("minutes", mins);
        extras.putInt("hours", hours);

        jobID = new JobRequest.Builder(ShowNotificationJob.TAG)
                .setExecutionWindow(startMs, endMs)
                //.setExact(startMs)
                .setExtras(extras)
                .setPersisted(true)
                .build()
                .schedule();


        return jobID;
    }