Android Question Countdown Timer Question

[ProjectGroup19]

Greetings Community,
Please, how do I do a countdown timer having a start and end time?

The start and end time is in the format "yyyy-mm-dd HH:mm:ss"

I want to have a sub that accepts the start time and end and countdown like this ?
TimerCountDown(start_time, end_time)


Thank you ?

 

[LucaMs]

https://www.b4x.com/android/forum/pages/results/?query=countdown+