AP exams have not been cancelled but are being provided in an online platform. All of the most updated information from College Board is provided in the links below. There are also review classes for courses (streaming schedules provided) and multiple free resources that are being offered.
https://apcentral.collegeboard.org/about-ap/news-changes/coronavirus-update
https://apstudents.collegeboard.org/coronavirus-updates
Here is the exam schedule for online testing.
https://apcoronavirusupdates.collegeboard.org/educators/taking-the-exams/ap-exam-schedule