Could not validate certificate signature?

Question

I use the SSL Socket and Trustmanager from this side Self signed SSL

but i keep getting following error:

09-28 19:52:41.942: WARN/System.err(1

Answer 1

BTW，we could re-produce this error easily -- just change the date of the phone to several years later.

NOTE: the error might be a little difference in different phone. Some might show that the certificate has expired.