I think Knopflerfish is close to releasing a version of their OSGi spec implentation for Android ...
Regarding the rest, security, android lifecycle and the rest of worries I am reading here I didn't get enough time to look into it but I do see many benefits of OSGi on mobile platforms - ex. Titan that Sprint used. No idea how it did but their intent was pretty novel. And I think you got some good feedback in this thread as I can see - cool! On Jul 8, 5:04 am, Daniel Drozdzewski <daniel.drozdzew...@gmail.com> wrote: > On 7 July 2011 23:07, Jesse <gotosl...@gmail.com> wrote: > > > I have looked at that, but the EZDroid community hasn't been updated since > > 2009 and there is practically no content on their site. This makes me think > > it is completely abandoned. They do link to some code which was presented at > > a conference a few years > > back: https://opensource.luminis.net/wiki/display/SITE/Apache+Felix+on+Andr... > > The code is extremely basic though and it doesn't address any of my > > concerns. In their example projects, they create all views through code. > > They don't reference any Android resources, such as layout files. There is > > no discussion on what happens to the view created by the bundle if the > > bundle needs to be updated or removed. > > Also, there is the fact that it is impossible to add an activity or service > > to an application without modifying the Android manifest. > > Jesse, > > That presentation that you linked shows few things that might be of help: > - Android does not allow apps to dynamically load classes, but there > are workarounds (app has root or all access allowed to > /data/dalvik-cache > - Apache Felix is portable (no crazy dependencies), so you can keep > porting newer versions as you need to Android > > What I understand is that you can achieve OSGI on a servce/business logic > layer > Resources (layouts, strings, graphics, ...) in Android are > pre-packaged and pre-compiled into binary bundle and then statically > referenced through R class, so here things get complicated. > > I don't think that by dropping a new class or a set of classes > (bundle), which is what OSGI enables, you could swap binary resources > files into an application and R class with it. > > In other words OSGI allows dynamic deployment of classes and services, > rather than dynamic deployment of arbitrary files. > > This means that you would have to expose your layouts through the > service. In other words have your layouts defined in code, rather than > XML files and your activities would have to use the coded layouts > served by the OSGI service running as a part of your app. > > Your layouts would have to come with their resources and you would be > loading those resources using your custom code rather than Android > APIs. > > You could have service exposed and managed through OSGI to retrieve > activities, which the Apache Felix presentation shows. That would > essentially be, what you need. > > Only thing that I am not sure about is the security and implications > of such setup... Apps need digital signing, activities and services > need upfront declaring through the manifest file. The presentations > asks Google for dynamic class loading and dynamic security policies, > which suggests that they have had some troubles. It is not clear > whether they have managed to work around these. > > If you are in charge of the device, there might be a way around such > limitation, say by installing your certificate as trusted one, so that > provisioned code signed with your key would be trusted. Again this is > a question to a platform engineer. > > Luminis website [*] certainly has some demo code next to that > presentation, so give it a go and see what can and cannot be achieved. > > Good Luck and if possible, please share your findings. > > Daniel > > [*]https://opensource.luminis.net/wiki/display/SITE/Apache+Felix+on+Andr... -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
