In the development of Android, when signing and packaging with a digital certificate, the first step is to enter the keystore password and pass the second step: if the alias password is not entered, an error will be reported. Java。 Security. UnrecoveryThisexception: CannotRecoveryThisexceptionMayResultFromthefactThayouhadProvided KeyPassword That wasdferentFromtheKeyStore Password Calling the getKey(alias, aliaspassword) function will cause this error. Please refer to the Android study manual for the solution to the problem. All the examples, source code and files are solved. The directory structure of androidstudo is adopted and downloaded from 360 mobile assistants. Below is a screenshot.