Searched on Google with the first line of a JAVA stack trace?

We can recommend more relevant solutions and speed up debugging when you paste your entire stack trace with the exception message. Try a sample exception.

Recommended solutions based on your search Keystore operation failed	at	at	at	at	at	at	at$SignatureImpl.engineInitSign(	at	at	at	at	at	at java.lang.reflect.Method.invoke(Native Method)	at$DeclaredOnClickListener.onClick(	at android.view.View.performClick(	at android.view.View$	at android.os.Handler.handleCallback(	at android.os.Handler.dispatchMessage(	at android.os.Looper.loop(	at	at java.lang.reflect.Method.invoke(Native Method)	at$	at