but its when i press back button

# android

[CarlosBlanco]

but its when i press back button

[Allan Wang]

You didn’t post a log and I don’t know where that block of code is. If you’re calling it during onBackPressed that could be the problem. Basically, you should get a line number, and it’s likely because you are asserting that something is nonnull (!!).

[CarlosBlanco]

ok check this