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I want to create an app that makes QR code that contains user's information.
The current scenario is that after sns log into the app, make QR code that contains user's account information
After that, I would like to create a QR code generator app that allows the user's information to be sent along with the QR code when User scan to QR code scanner.
What I'm curious about right now is whether I can make a QR code that contains the account information for that user, and if I can, what modules I can use to create.
Yup, it's completely possible.
Zxing, library ( Java ) can be used to generate as well as decode the QR code.
Some relevant tutorials are :
Java QR Code Generator
Reading QR code
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I have a game that is super simple, no animations or that kind of stuff, it is some sort of trivia game. I can, already, save user's max. score locally via sharedpreferences, what I want to do now, is to save max. scores in some kind of server all users' and display them, maybe, in one screen.
I am not asking here for code, I realize that would be hard without seeing my game's source code.
I need any advice here to which method to use for saving user's 'simlpe' data?
Should I use firebase to save all users' max. scores or using Google Play Games would be a better choice?
By the way, I don't want to interrupt user for email, google sign in or any other that kind of methods. User will only update their username and profile photo (if they choose to).
You can use firebase realtime database or firestore to save user data. You don't have to use authentication if you don't want Google sign in.
Check the following :
https://pub.dev/packages/cloud_firestore
https://pub.dev/packages/firebase_database
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I'm building a Web Application using ASP.NET MVC and I'd like to implement a Gamification system to make the user experience more exciting.
I'd like to start with a simple score for each user and as they progress and get more points they get badges and unlock new features for themselves, something similar to how Stackoverflow does it.
What appears challenging to me is how to check in the entire application, whether a user has reached a score that can recieve a badge. I don't want to duplicate my code and perform this check in every place that I'm incrementing a user's score.
I'd like to know how can I start implementing such a system. I know it's a broad question but I'm just looking for some starting ground and some good practice to begin.
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I am making a program in Qt5.2.1 and in it I am using a text file to store some data. I would like to encrypt it and decrypt it inside the program and display the text stored in the file in a QPlainTextEdit ( or any other similar widget).
I searched and came across Qcryptographichash but i have no idea how to use it. I read somewhere that it does not provide a very secure encryption but that doesn't matter ( I am not expecting hackers to try and read this file).
So, could anyone guide me in the right direction, maybe even give me some code. :D
QCryptographic hash creates a hash from given data. That is a one-way process, so the it will not do what you want, namely encrypt the data in a form that can be retrieved via decryption.
You can read more about the difference between encryption and hashes here.
You need to research into possible encryption algorithms. To my knowledge, that's not something that is part of Qt.
It's a large area of on-going research; there are so many to choose from, as you can see here.
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Can you please direct me to a tutorial or other resource for accomplishing the following:
Index page lists 50 states. Onlick of a state Y, the report page (report.aspx) will display info related to state Y, pulled from database.mdb, interspersed in HTML text.
I am not even sure what the terms and controls I need to be working with.
Thank you.
UncleJune
Do you know how to create the report? That is the first step. After that it is just a matter of passing the required parameter from one page to the next. Several methods can be used to do this: Response.Redirect/Request.QueryString, session variable, etc.
This tutorial might help you:
Using the ASP.NET 2.0 ReportViewer in Local Mode
Dynamic reports with Microsoft local report engine
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Let say that I have a website with some information that could be access externally. Those information need to be only change by the respected client. Example: Google Analytic or WordPress API key. How can I create a system that work like that (no matter the programming language)?
A number of smart people are working on a standard, and it's called OAuth. It already has a number of sample implementations, so it's pretty easy to get started.
Simple:
Generate a key for each user
Deny access for each request without this key
Currently, I use a concatenation of multiple MD5s with a salt. The MD5s are generated off of various concatenations of user data.
A good way of generating a key would be to store a GUID (Globally Unique Identifier) on each user record n the database. GUID is going to be unique and almost impossible to guess.
There are also infrastructure services that manage all this for you like http://www.3scale.net (disclosure I work there), http://www.mashery.com and http://www.apigee.com/.