Calender import of all day events fails with 'Invalid int: "T0"'

[Joe4Git]

Hello,

I still have the import failure on all day events in version 2.6
The failing ics can be reduced to the lines below for testing.

BEGIN:VCALENDAR
VERSION:2.0
METHOD:PUBLISH
BEGIN:VEVENT
DTSTART;VALUE=DATE:20180101
DTEND;VALUE=DATE:20180101
TRANSP:TRANSPARENT
RRULE:FREQ=YEARLY;COUNT=10;BYMONTHDAY=1;BYMONTH=1
LAST-MODIFIED:20170903T082924Z
DTSTAMP:20180919T130104Z
SEQUENCE:0
CATEGORIES:Birthday
CLASS:PUBLIC
SUMMARY:Name
UID:C5BE50732246E7A
END:VEVENT
END:VCALENDAR

The log shows this exception:

03-03 22:00:56.803: E/DatabaseUtils(9941): Writing exception to parcel
03-03 22:00:56.803: E/DatabaseUtils(9941): java.lang.NumberFormatException: Invalid int: "T0"
03-03 22:00:56.803: E/DatabaseUtils(9941): 	at java.lang.Integer.invalidInt(Integer.java:137)
03-03 22:00:56.803: E/DatabaseUtils(9941): 	at java.lang.Integer.parse(Integer.java:374)
03-03 22:00:56.803: E/DatabaseUtils(9941): 	at java.lang.Integer.parseInt(Integer.java:365)
03-03 22:00:56.803: E/DatabaseUtils(9941): 	at java.lang.Integer.parseInt(Integer.java:331)
03-03 22:00:56.803: E/DatabaseUtils(9941): 	at com.android.providers.calendar.CalendarProvider2.fixAllDayTime(CalendarProvider2.java:1588)
03-03 22:00:56.803: E/DatabaseUtils(9941): 	at com.android.providers.calendar.CalendarProvider2.insertInTransaction(CalendarProvider2.java:2202)
03-03 22:00:56.803: E/DatabaseUtils(9941): 	at com.android.providers.calendar.SQLiteContentProvider.insert(SQLiteContentProvider.java:98)
03-03 22:00:56.803: E/DatabaseUtils(9941): 	at android.content.ContentProvider$Transport.insert(ContentProvider.java:220)
03-03 22:00:56.803: E/DatabaseUtils(9941): 	at android.content.ContentProviderNative.onTransact(ContentProviderNative.java:156)
03-03 22:00:56.803: E/DatabaseUtils(9941): 	at android.os.Binder.execTransact(Binder.java:404)
03-03 22:00:56.803: E/DatabaseUtils(9941): 	at dalvik.system.NativeStart.run(Native Method)
03-03 22:00:56.807: E/ICS_RunnableWithProgress(10095): An exception occurred
03-03 22:00:56.807: E/ICS_RunnableWithProgress(10095): java.lang.IllegalArgumentException: Invalid int: "T0"
03-03 22:00:56.807: E/ICS_RunnableWithProgress(10095): 	at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:167)
03-03 22:00:56.807: E/ICS_RunnableWithProgress(10095): 	at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:137)
03-03 22:00:56.807: E/ICS_RunnableWithProgress(10095): 	at android.content.ContentProviderProxy.insert(ContentProviderNative.java:468)
03-03 22:00:56.807: E/ICS_RunnableWithProgress(10095): 	at android.content.ContentResolver.insert(ContentResolver.java:1190)
03-03 22:00:56.807: E/ICS_RunnableWithProgress(10095): 	at org.sufficientlysecure.ical.ProcessVEvent.insertAndLog(Unknown Source)
03-03 22:00:56.807: E/ICS_RunnableWithProgress(10095): 	at org.sufficientlysecure.ical.ProcessVEvent.run(Unknown Source)
03-03 22:00:56.807: E/ICS_RunnableWithProgress(10095): 	at org.sufficientlysecure.ical.ui.dialogs.RunnableWithProgress$1.run(Unknown Source)
03-03 22:00:56.807: E/ICS_RunnableWithProgress(10095): 	at java.lang.Thread.run(Thread.java:841)

It's a long time ago where I digged into to code to find the "T0". Don't remember if I unterstood fixAllDayTime(). Finally I tried to change the DTSTART and DTEND values corresponding to the ical reference to
'DTSTART:20180101
DTEND:20180101'
and it was working.

I tried to find the error in the ical4j implementation but it fails to parse this lines. So I tried another version:
'DTSTART;VALUE=DATE-TIME:20180101T000000
DTEND;VALUE=DATE-TIME:20180101T235959'
and it works with ical4j and on android with the calender-import

Because I just fetched the master version of ical4j from github, I can not compare how the version you are using is working.
Please try the example above to verify the fixAllDayTime() method.