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This is part 3 of the RAD Chatroom tutorial. You can find part 1 here and part 2 here. Adding Text Messages from Other Users Our current example only includes messages that the current user posted themself. I.e. We only have chat bubbles on the right-hand side of the view. Let’s add some more sample …

This is part 2 of the RAD Chatroom tutorial. You can find part 1 here. Adding a “Send” Button A “Send” button is a pretty important part of any chat application. We’ll add a send button to our app by defining an action in our controller, and passing it to the ChatRoomView as follows. First …

This tutorial describes how to use the RADChatRoom library to quickly and easily add a nice-looking, fully functional chat room to your Codename One application. This is part 1 of a multi-part series of posts over the next few weeks. The finished product will look like the following: You can download the full source of …

I wrote before about EasyThread which makes it much easier to write multi-threaded code in Codename One. One problem in that scenario was the inability to define a generic exception handler for that scenario. With the current version of Codename One we now have a new generic error handling API for easy threads: public void …

We hope you’re all keeping safe! We announced a couple of weeks ago that we’re moving our build servers to use xcode 11.3 by default. As a recap, Apple requires a new version of xcode/iOS SDK for apps submitted to the appstore. As a result we had to update the version of xcode on our …

Apple keeps moving the goal posts of xcode requirements for developers. This is good as it keeps the technology fresh but it means support for older devices becomes untenable. Unfortunately there isn’t much we can do and we need to move with the times as Apple will no longer accept apps built with older versions …

Not so long ago, we released a Sheet component that acts like a non-modal dialog box that slides up from the bottom. It occupies only the amount of space required to house its contents, and it provides built-in navigation controls to go “back” to the previous sheet. By default Sheets are displayed along the bottom …

We’ve just added support for including CSS inside of Codename One library projects so that CSS styles can now be distributed inside a cn1lib. This opens up a world of possibilities for creating module UI libraries and themes. How it works To begin, you just need to add a “css” directory inside your Codename One …

If you have an existing Codename One app that uses the designer for its theme, then you may have been reluctant to try to migrate it to CSS. Codename One projects are assumed to be using either CSS or the designer for their themes. But not both at the same time. When an app has …

Apple is so very clever with its designs. With the iPhone X, they found way to squeeze in a larger screen without increasing the phone dimensions. The screen nearly covers the entire front face of the phone. The “notch”, as it has come to be known, may have been a practical concession (they needed to …

We have just finished the initial release of our “Sign-in with Apple” cn1lib, which adds “Sign-in with Apple” support to Codename One apps. On iOS 13 and higher, this will use Apple’s native Authentication framework. On other platforms (e.g. Android, Desktop, and Simulator), this will use Apple’s Oauth2 authentication service. The main motivation for adding …

The duality of InteractionDialog and Dialog is often confusing to the Codename One newcomer (and to some degree to veteran developers too). This is in part due to the multiple behavior differences that extend far beyond the “official” functionality difference. This has its roots in history that predated Codename One. In this post I’ll try …