android framework development

I am new in android framework development .

I try to add a service in platform/base and then I make the whole platform folder follow a post online.

Now i don't know how this change can be applied to android application. Do I need to get a new android.jar package for the application?

Thanks

update --------------------------------------------

1. currently I have the android source code and modified its framework by adding a testservice.java following this : Android-Adding SystemService

2. Then I need to write a test app to use this testservice. But I don't how to add an app to that modified android source code. I try to following this:set up the Eclipse IDE for Android platform development to add app src path to eclipse build path , I doesn't work.

3. before this i use eclipse and ADT to write android apps, i am wondering is there any way to write an app in the modified android source code ?

Thanks

I copied an app under [and开发者_JS百科roidroot]/packages/apps/ folder and rename it and modify some code . Then it shows in application list. It works! But the problem is the directory structure is strange , very different from the one I create from the eclipse + sdk . So is there anyone know how to develop apps under a modified android framework.

Thanks !!!

I see a quick and dirty solution: replace the corresponding android.jar in the install SDK location (for example $ANDROID_HOME/platforms/android-8/android.jar if you deriver from Android 2.2).

Also you may try to spoof a separate platform revision in $ANDROID_HOME/platforms. Something like android-99 to avoid clashes with the actual future platforms.

Though all of these are dirty tricks this may work for quick testing of your platform code without much pain.

It is exactly the same as the project you create using eclipse. What's more all you need is to write a makefile in the directory. Then mmm framework/res framework systemserver

bw