On 20 June 2012 08:32, neuron <[email protected]> wrote: > Hi > > I'm currently working on a project to port some hardware to android. We need > to run it as a native daemon, (as root is fine), and to build a SDK so > people can communicate with it. > I've found a lot of different into on how to get this working. The hardware > relies on low latency between hardware and client application. We've looked > into ashmem, (and been recommended to not ever touch it), and the android > Binder. > > My current attempt is building > https://github.com/keesj/Android-HelloWorldService into > android_source/packages/apps/Android-HelloWorldService. Building this > produces two c++ native applications. If I as root run them both they can > communicate, but I can't get that to build an apk for a client side app, and > I'm not sure how to go about doing it either. > > Am I doing about this the right way? We need low latency communication > between the daemon and the client side applications. > > I think what I'll eventually end up with is: > 1. Our current library, cross compiled to a shared library using gcc4.6 for > arm. (GCC 4.5 or higher is a build requirement, current NDK is 4.4).
Bero has been compiling Android against GCC 4.6 for a bit (he's currently on 4.7) against tip AOSP. If you run into trouble feel free to take a look at our builds https://android-build.linaro.org/. > 2. A daemon that links to the library above + has binder code. I was > thinking just using init.d to start this on boot. > 3. A client native library that connects to the binder above. (The one from > HelloWorldService works, but I have to run it as root to get it to connect). > 4. A java wrapper for the library above. > 5. A demo app using our library. > > And I guess per device we put the hardware in we'll need to build step 2 and > 3 and push them to the device. Installing #2 and possibly something in #3 as > root. > > Best regards > N > > -- > unsubscribe: [email protected] > website: http://groups.google.com/group/android-porting -- Zach Pfeffer Android Platform Team Lead, Linaro Platform Teams Linaro.org | Open source software for ARM SoCs Follow Linaro: http://www.facebook.com/pages/Linaro http://twitter.com/#!/linaroorg - http://www.linaro.org/linaro-blog -- unsubscribe: [email protected] website: http://groups.google.com/group/android-porting
