Android Question web audio player and recorder problems

[MohMor]

hello
in my code below, when i clicked on "btnrecord" my app was crashed and i get an error. also when i clicked "btnweb", music was not played. how can i solve that problem?
thank you

the link is here:

 

[Erel]

You have posted a link to a restricted google drive file.

Best to post the relevant code directly and always post the full error message.