Bells Clock tells you the time in the context of a schedule of school periods or blocks. E.g. "1:15PM, 40 minutes left in 6th Period"

This is my first Android application yet is actually useful and quite functional. Experienced developers might shudder at my design and code but I'm learning.... Comments welcome.

Details:
You can customize a bell schedule by adding or deleting class periods, modifying their start and end times, adding or deleting whole schedules, and modifying the names of the periods.

School bell schedules can be imported from a Comma Separated Values text file located on the device or, for school-wide distribution of a set of schedules, from a Web site.

The CSV file format is simple:
- Quotation marks are optional.
- A schedule record precedes the set of period records.
- Period record format is
periodname,start HH:MM,end HH:MM
- Sample file:
# Comment lines have leading hash mark
# Next line is a schedule name (no colon or comma)
Regular
# These are period records name-of-period,HH:MM,HH:MM
Home Room,7:55,8:05
1st Period,8:08,8:48
2nd Period,8:51,9:31
Break,9:31,9:41
3rd Period,9:44,10:24
4th Period,10:27,11:07
5th Period,11:10,11:50
Lunch,11:53,12:33
6th Period,12:36,13:16
7th Period,13:19,13:59
8th Period,14:02,14:42
Office Time,14:42,15:15
# Next schedule
A.M. Assembly
Home Room,7:55,8:03
Assembly,8:05,9:15
1st Period,9:18,9:51
# And so on.....