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Codename One powers more than 50M devices; it's used by Fortune 500's, banks & governments worldwide!
Free Download »Codename One is the only Java iOS tool that currently comes close to the old "Write once, run anywhere" mantra...
JavaWorld
Press
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If I had to choose a startup to invest in this year, it would have to be Codename One. [...] I expect them to experience significant growth in 2013.
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Codename One is the only Java iOS tool that currently comes close to the old "Write once, run anywhere" mantra, and it provides the most coherent development experience.
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Codename One [...] stands to drastically change the rate and cost at which developers will churn out new mobile apps.
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Codename One [...] uses special lightweight technology that eliminates fragmentation and offers developers a platform for mobile application development as easy as desktop development.
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The Java development/debugging is done entirely locally, but when building for the device, the cloud portion does all the heavy lifting
Learn about Codename One based on what you already know...
Built with Codename One (click items to launch extended gallery)
Latest entries from our blog
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Codename One Graphics - Understanding Coordinates
Codename One provides a rich set of drawing primitives in its Graphics class. It allows you to draw text, shapes, and images to the screen. The position where these elements will be rendered is determined based on a combination of Graphics state information...
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Easy Demos, Flip & More
One of the pains in Codename One is the access to the demos, yes we have the downloadable demo bundle and the SVN but for a compete novice to Codename One this isn't front and center...
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New Free Course: Learn Mobile Programming By Example With Codename One
We just released a new online course on Udemy called "Learn Mobile Programming By Example With Codename One". Before a single day went by and before we had time to announce this we already had over 600 students enrolled...
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PropertyCross Demo
The new property cross demo shows off the usage of webservices, JSON parsing, infinite scroll, URLImage and lots of other Codename One features. It uses a UK webservice that allows listing properties for sale in the UK...
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Codename One Graphics - Low Level Animations
In my previous post, I created a static analog clock component. In this post, I will use Codename One’s animation API to update the clock every continually so that it will keep time correctly...
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Status Of The New VM & New Demo
Now that we are officially in the 64bit era of the iOS app store and our new VM is the default target it has gotten much stabler and helped us track issues that have been a part of Codename One since its inception. As part of improving the VM...
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Codename One Charts
The upcoming update to Codename One will include a new package (com.codename1.charts) for rendering charts in your applications. This includes models and renderers for many common classes of charts including many flavors of bar charts, line charts, scatter charts, and pie charts...
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Dr. Sbaitso
I recently flew to dev day at Riga, I was quite ill before the trip so it was pretty difficult and that's the main reason I didn't make a trip report like I normally do. However...
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Codename One Graphics Part 2: Drawing an Analog Clock
The Graphics class has included limited support for 2D transformations for some time now including scaling, rotation, and translation...
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Web App Build Target
In the past we made several attempts at compiling Codename One applications to webapps, these were only partially successful. On the surface this seems relatively simple...
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Location, iOS Beta Testing & Better Input
In recent versions of iOS Apple added the ability to distribute beta versions of your application to beta testers using tools they got from the testflight acquisition...
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Codename One Graphics
This is the first in a series of posts about drawing graphics in Codename One. In this tutorial, we will create a rudimentary drawing app to demonstrate how to use the Shape API...
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Dr. Sbaitso Coming To Riga
I'll be speaking at Riga Dev Day next week and I've been working on a demo for the conference. Back in my teen years I bought the SoundBlaster 1.0 which was one of the first affordable soundcards for the PC...
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The toArray(new Array) Antipattern
A recent issue in the issue tracker on the new iOS VM reminded me of a serious pet peeve and big design mistake in the Java Collections API, something that is just unfixable and wrong yet appears often in code from developers trying to be clever...
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Game On
A Codename One community member Antonio Mannucci offered to release a gaming API that he created a while back. It took him some time but he finally delivered on his promise by releasing a cn1lib for simple 2D games in Codename One and a demo game to go with it...
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Cats in Toolbars
Chen spent some time working on some Toolbar effects such as the rich title areas made popular by social network apps such as G+ & Twitter...
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Happy New Year - Looking Back & Forward
We are closing 2014 which has been a pretty eventful year for us where we finally solidified Codename One, looking into 2015 we have a lot of great plans ahead...
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Stabilizing The New VM
Its always a challenge to migrate to a new implementation and the new VM is no exception, we ran into several issues and are already hard at work fixing them...
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New Codename One iOS VM Is Now The Default
New builds sent for iOS will now use the new iOS VM by default, this will deliver a lot of new features: stack traces, 64 bit, xcode 6+ support, iPhone 6/6+ native resolution, no stall GC etc...
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Toolbar
One of the common requests we get from users is more customization for the title bar area with more flexibility e.g. placing a TextField for search or buttons in various ways...
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Lollipop Take 2 & iOS VM Stability
Our previous attempt at getting the new Lollipop behavior on Android OS 5 didn't go as well as we had hoped. While we can't find any device that failed we got a lot of community reports of...
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JSON To Pojo Mapping
While the webservice wizard in Codename One is pretty useful for many things it still requires a proxy and Servlet container which might not be the right choice for everyone...
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Continuous Integration
Building enterprise mobile apps can be pretty challenging especially when dealing with rapid changes, prototyping and corporate development requirements...
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Round At Codemotion
I've had a lovely time giving a demo of Codename One at Codemotion Tel Aviv, one of the things that surprised me about the conference is that the sessions are so short (40 minutes) which...
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SMS & Custom Commands
One of the problems in cross platform development is availability of functionality on one platform that is missing on another. Case in point sending an SMS message. Android, RIM & J2ME support sending SMS's in the background...
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Static Garbage & Lollipop
As we wrote before our new Garbage Collector is designed for amazing speed an never locks, this worked really well for most cases but we started running into weird crashes that took us deep into...
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Don't Block The UI
I've talked with many end users about their badly written apps grievances and I've come to the conclusion that it isn't a matter of native vs. cross platform or even HTML. Its a frustration issue, driven by unintuitive apps (hidden gestures etc.) and slow performance...
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CallSerially The EDT & InvokeAndBlock (Part 2)
The last time we talked about the EDT we covered some of the basic ideas, such as call serially etc. We left out two major concepts that are somewhat more advanced...
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Side Swipe
Chen's been busy with some customers on a feature that is often requested: mailbox like swipes. This effectively allows you to swipe a component to the side in order to reveal capabilities underneath e.g. edit, delete etc...
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Admob Interstitial Ads & Supertabs
Ram (the developer of yhomework), wanted to improve his ad revenue on Android/iOS thru interstitial (full screen) ads and integrated those using native interfaces...
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Mighty Morphing Components
One of the nice effects in the Android material design is the morphing effect where an element from the previous form (activity) animates to become a different component on...
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64 bit & OSS VM
Apple Just announced they will mandate 64 bit for all new submissions starting February 2015, luckily we are very prepared for that and we already support 64 bit builds in our new VM.
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CallSerially The EDT & InvokeAndBlock (Part 1)
We last explained some of the concepts behind the EDT in 2008 so its high time we wrote about it again, there is a section about it in the developer guide as well as in the courses on Udemy but since this...
