[android-developers] how to use android-support-v7-gridlayout project as a library project build in android2.3 launcher source code

I am developing launcher base on android2.3 source code,I have tried to put android-support-v7-gridlayout.jar into libs and add LOCAL_STATIC_JAVA_LIBRARY in android.mk file and it complied well but have runtime error said NoClassDefFind R$dimen etc.I want to know whether we can build gridlayout project as a library project of Launcher in android source code environment,how to modify android.mk file?

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