JJ’s Studio is a software consultancy specialized in Android technologies. We are experienced in both system and application layers, plus several years of experience before that in Linux mobile phone development.
We have co-founded the well-known 0xlab.org, as well as created/contributed to several Free and Open Source Software projects, such as 0xdroid, 0xbench, OpenEmbedded, and OpenWrt.
Our services include:
- Android application: standard Android application that fits into the varieties of Android devices.
- Framework development: develop or integrate new features into device firmware in framework layer and below.
- Performance analysis: get more out of your hardware by profiling and tuning.
JJ’s Studio differentiates ourselves by the unique combination of knowledge in different layers of Android architecture. This enables us to work in different areas from developing a mobile application to delivering a complete device firmware.
Please also check my partner Julian’s article on this (in Traditional Chinese).
JJ’s Studio 為專精於 Android 相關科技的軟體顧問工作室。我們對於系統與應用層皆有經驗，並且在 Android 之前就有數年的 Linux 手機開發資歷。
我們與朋友共同創立了知名的 0xlab.org，並曾創立或貢獻給以下的開放原始碼專案：0xdroid, 0xbench, OpenEmbedded, OpenWrt.
- Android 應用程式：著重於對不同 Android 裝置的相容與一致性。
- 框架層開發：將新功能開發或整合進 Android 框架或底層系統之中，直接包含在出廠韌體內。
JJ’s Studio 的獨特競爭優勢來自於對 Android 系統各不同層面的理解。這讓我們可以勝任從應用程式開發，到發布完整的裝置韌體等不同的工作領域。
請參考我的夥伴 Julian 對此發布的文章。
These are some of the slides from the technical speakers of the Android System Development Forum on April 28th, 2011. Copyrights belong to their perspective owners and distributed under their permission.
Android RenderScript on LLVM
by 廖世偉 博士
Is parallel programming hard? And if so, what can you do about it?
by Paul McKenney
Guides To Analyzing WebKit Performance
by Holger Freyther and Jim (jserv) Huang 黃敬群
Linaro and Android Kernel
by Andy Green
There are still some slides missing and I’ll keep updating here.
By coincidence, the abbreviation of this is ASDF, which is kind of geeky…
0xlab is going to co-host this event on 2011/04/28. Please refer to
for more information. The introduction page is in Traditional Chinese, but some of the sessions are in English.
We think there are quite some Android summits out there, but most of them are about application development and business trends. We want to focus on the system development aspect from a more technical point of view.
Oh by the way, did I mention it’s free of charge?
Here is my slides for the osdc.tw 2011 speech: The meaning of open. The content includes traditional Chinese.
I began writing this at February, but never have the chance to put in everything I wanted to put in. Now I decided that it’s better to publish it in its current form then not doing it at all. So, here it goes. You may also download the PDF version.
Ten months ago when we just established 0xlab, we do have some ideas regarding our business model in mind. We cannot say exactly what it is, since we are under the constraint of NDA. However, I can roughly outline our goals and our progress here.
In the world of open source, you gain credibility by contributing. The more credibility you have, the more powerful you become. Basically 0xlab’s initial and first goal is to open up our development, establish our credibility and get more publicity. Our policy to open up as much as we can turns out to be more beneficial then we have expected. Since we put our code in the open, any individual or business entity who is interested in us can evaluate our results directly. This leads to direct communication channel to developers inside some big companies such as Google, Qualcomm (Innovation Center), Broadcom, TI, EMBINUX (SQL Star) and Motorola, or even cooperation in business level.
We found out that since we don’t sell software for a living, but instead we use software to add value to the hardware (made by AzureWave), the work we did is actually beneficial to our sponsor, so they are willing to keep supporting us. This means a lot (in my opinion), since nobody in Taiwan believes that people can write open source for a living, until we proved them wrong. I believe we’re reproducing a ecosystem, which is not uncommon in Europe and US, but never shows up in Taiwan before.
Since we can support ourselves now, what’s the next step? I can’t disclose it, but suffice to say we are planning to take this a step further. We hope, once we proved that business can make money from openness, more Taiwanese companies can understand and duplicate our open source model, thus creates more modern software developers and stay closer to the world.
We have been busy in the past two months, and now it’s time to open up our code. Please keep in mind that most of these projects are not in the release state yet, but subjects of ongoing development.
You can find all of our source code at: http://gitorious.org/+0xlab. Here is a brief introduction of each project:
- MadButterfly: a git clone of the original project. The real project is hosted at assembla. MadButterfly is very likely to be the base of our 2D UI framework. It’s based on SVG instead of traditional toolkits such as gtk or kde, so it will give the UI designer a lot of space to unleash his/her creativity. The main developer’s (Thinker) blog is here.
- Android Eee PC: it aims to ease the porting of Android to Eee PC. At the moment the most interesting thing is the 3D acceleration structure on it, which can use the existing hardware driver in Mesa. Check this video to see what it can do. (blog)
- 0xlab’s Linux Kernel Tree: it contains several branches for different platforms, like Omap3, SMDK6410, and may be more in the future. Also, all of them are intended for being able to boot into Android. We tend to use the Beagle Board (OMAP) as our main development platform because it’s cheap and open.
- esuit: the Embedded System Unit/Integrated Test cases framework. It aims to provide a unified method to verify the functionalities of a hardware platform. This project is in planning phase, so no source code is available yet.
- android obex: it provides obex file sharing in Android. (blog)
From now on, we will direct all of our technical discussions to the 0xlab-devel mailing list. Plus, IRC #0xlab is the place we usually hang out. If you want to reach us directly, mail us.
I will join the OESF (open embedded software foundation) progress conference on 6/24. Although the name suggests similarities to OpenEmbedded, this foundation has nothing to do with OE, but focuses on Android development. I’m not sure if it’s a member of OHA since I can’t read Japanese and Google Translate is very vague on this.
It’s a bit old but I’ll share it anyway. The content is in traditional Chinese.
Android porting development kit could be obtained by
make pdk pdk_all
in your top repo dir. You can find the pdk doc in out/target/common/docs/online-pdk . If you open index.html directly you will find the css is all messed up. The quickest way might be moving the directory to /var/www, install one web server (I use thttpd) then open http://localhost/online-pdk/ .
The document is far from complete but it’s still a good reference to save a lot of time.