How do I get difference between two dates in android?, tried every thing and post

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You’re close to the right answer, you are getting the difference in milliseconds between those two dates, but when you attempt to construct a date out of that difference, it is assuming you want to create a new Date object with that difference value as its epoch time. If you’re looking for a time in hours, then you would simply need to do some basic arithmetic on that diff to get the different time parts.

Java:

long diff = date1.getTime() - date2.getTime();
long seconds = diff / 1000;
long minutes = seconds / 60;
long hours = minutes / 60;
long days = hours / 24;

Kotlin:

val diff: Long = date1.getTime() - date2.getTime()
val seconds = diff / 1000
val minutes = seconds / 60
val hours = minutes / 60
val days = hours / 24

All of this math will simply do integer arithmetic, so it will truncate any decimal points

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