The discussion that I started initially was to find out if a service can be defined in a jar file (not Android library) and if the jar file can be distributed for application developers and if they can bind or start that service ? I was simply unable to do it. Ofcourse, the service was declared in the application's manifest file. Once I created a Android library and defined the service in the library, then it worked fine, but with this approach, source code of the library will have to distributed.
RK On Wednesday, February 13, 2013 4:26:51 PM UTC-8, Kristopher Micinski wrote: > > If I'm not misreading this discussion, the problem is that every > service must explicitly be declared in a manifest file. There is no > such thing as implicitly or programmatically creating a service. > (This has an unfortunate benefit for would be dynamic scripting > languages implemented ala JVM wrapper which might otherwise allow you > to have first class components..) > > This is pretty typical: lots of jars for Android are distributed with > the caveat that you need to explicitly declare a certain Service in > your Android manifest. > > And yes, library projects basically allow you to do this for the user > using your project, so that they don't have to (as) explicitly set up > your components. > > Kris > > On Wed, Feb 13, 2013 at 5:11 PM, RKSHR <rks...@gmail.com <javascript:>> > wrote: > > I spent some more time and this is what I found so far. > > > > - An app cannot bind to a service or instantiate a service if the > service is > > declared in a jar file (that is not a Android library). Note that I'm > just > > building a jar file using javac compiler and jar utility, without the > need > > for AndroidManifest xml file. I tried creating a TestService class that > > extends Service class and built that into a jar. In a test app, I > imported > > the jar file and put a break point in onStart() and onCreate() methods > of > > TestService class. In the app I tried calling both bindService and > > startService, both of them return a false or a null value and the > debugger > > never breaks in onStart() or onCreate(). Both these methods had one > line > > implementations with a just a call to their super class like > > super.onStart(). > > > > - In the next step I moved the TestService outside of the jar into an > > Android library (in Eclipse enable checkbox "Is Library" or > > project.properties should contain android.Library=true ). I built the > > library and included it into the test app. Now i can instantiate the > service > > using bindService API from the app, the debugger breaks in onStart() and > > onCreate() methods of TestService class. > > > > > > On Monday, February 11, 2013 4:30:56 PM UTC-8, Lew wrote: > >> > >> RKSHR wrote: > >>> > >>> No the JAR is not set up as a Library project, as all I have is, > compile > >>> the classes using javac and then bundle them into a jar using jar > builder. > >> > >> > >> You should probably build it as a library project, since it does have > >> something specific to Android in it. > >> > >> I'm not expert in library projects, but as I understand they're the way > to > >> package Android stuff for other Android stuff. > >> > >> > >> By "nothing specific to android [sic]", I meant the classes used within > >> the service, other than the obvious service class. I did not have this > >> service class before and there is a singleton factory class that the > app was > >> using to instantiate. Now I have moved the factory instantiation into > the > >> service class. I want the app to just bind to the service, so the > factory > >> instantiation happens in the background within the service. > >> > >> > >> There's a world of difference between "nothing" and "nothing other > than... > >> ". > >> > >> And that difference might be the difference that makes the difference. > You > >> might want to investigate. > >> > >>> > >>> Lew wrote: > >>>> > >>>> RKSHR wrote: > >>>>> > >>>>> I did make sure that there were no R.xx classes in the service, > infact > >>>>> I dont need any resources in the service. I did double check again > and > >>>>> nothing was present, although an import definition to resources > class was > >>>>> left there. I wasn't sure if it would make a difference, but I > removed that > >>>>> definition anyway and recompiled the jar without any different > result. The > >>>>> application loading the jar, still cannot bind to the service. The > service > >>>>> is a very simple class that just instantiates a set of regular java > classes > >>>>> (nothing specific to Android). I'm not even able to debug into the > service, > >>>>> I have a break point at onStart() and onCreate() methods and it > never falls > >>>>> there. I will continue looking. .thanks. > >>>> > >>>> > >>>> "nothing specific to Android" is obviously false since there's a > service > >>>> class in there. > >>>> > >>>> Is the JAR source set up as an Android library project? > >>>> > >> > > > > -- > > -- > > You received this message because you are subscribed to the Google > > Groups "Android Developers" group. > > To post to this group, send email to > > android-d...@googlegroups.com<javascript:> > > To unsubscribe from this group, send email to > > android-developers+unsubscr...@googlegroups.com <javascript:> > > For more options, visit this group at > > http://groups.google.com/group/android-developers?hl=en > > --- > > You received this message because you are subscribed to the Google > Groups > > "Android Developers" group. > > To unsubscribe from this group and stop receiving emails from it, send > an > > email to android-developers+unsubscr...@googlegroups.com <javascript:>. > > For more options, visit https://groups.google.com/groups/opt_out. > > > > > -- -- You received this message because you are subscribed to the Google Groups "Android Developers" group. 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