change line 100 in https://github.com/dschuermann/ntp-sync/blob/master/API-Demo/src/main/java/org/ntpsync/apidemo/BaseActivity.java#L100
Intent i = new Intent(INtpSyncRemoteService.class.getName());
i.setPackage("org.ntpsync");
bindService(i, mConnection,
Context.BIND_AUTO_CREATE);