Android sms hide block or app password lock

Android java class for sms blocking ,hide or password lock on the sms app. I need that class to integrate it to my existing [login to view URL] should make a class that should hide or block the sms when a button is selected and unblock or unhide via a other button,The sms message received during the block should be available after the [login to view URL] you are not able to block or hide tou can make a class that put a password lock on the sms cellphone default app.