KeyguardSample.java

//region [in some funtion]
if (keyguardManager.isKeyguardLocked()) {
   // custom title and some description
   Intent intent = keyguardManager.createConfirmDeviceCredentialIntent("My Title", "A Custom Description");
   if (intent != null) {
       startActivityForResult(intent, REQUEST_CODE_CONFIRM_DEVICE_CREDENTIALS);
   }else{
        Toast.makeText("Secure lock screen hasn't set up").show();
   }
}
//endregion

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (requestCode == REQUEST_CODE_CONFIRM_DEVICE_CREDENTIALS) {
       if (resultCode == RESULT_OK) {
           Toast.makeText("Success").show();
       } else {
           Toast.makeText("Cancel").show();
       }
    }
}