Launching New Studio

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, as well as created/contributed to several Free and Open Source Software projects, such as 0xdroid, 0xbench, OpenEmbedded, and OpenWrt.

Our services include:

  1. Android application: standard Android application that fits into the varieties of Android devices.
  2. Framework development: develop or integrate new features into device firmware in framework layer and below.
  3. 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).


John Lee

(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,並曾創立或貢獻給以下的開放原始碼專案:0xdroid, 0xbench, OpenEmbedded, OpenWrt.


  1. Android 應用程式:著重於對不同 Android 裝置的相容與一致性。
  2. 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。
  3. 效能分析:對系統剖析與調整,讓硬體發揮更大效能。

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


John Lee


Slides of the Android System Development Forum

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.

Android System Development Forum

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?

First code drop of 0xlab

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: Here is a brief introduction of each project:

  1. 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.
  2. 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)
  3. 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.
  4. 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.
  5. 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., 6/24

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.