I have download eclipse luna  then after i have doenload android-sdk-linux then after I have run tools/android update sdk --no-ui this command what next step I have done so I develop android application in my eclipse.
I have try to import my old android project this gives errors like:
Description Resource    Path    Location    Type
The project was not built since its build path is incomplete. Cannot find the class file for java.lang.Object. Fix the build path then try building this project    google-play-services_lib        Unknown Java Problem
The project was not built since its build path is incomplete. Cannot find the class file for java.lang.Object. Fix the build path then try building this project    gu10science     Unknown Java Problem
The type java.lang.Object cannot be resolved. It is indirectly referenced from required .class files    TestActivity.java   /gu10science/src/com/sparrow/gu10science    line 1  Java Problem
The type java.lang.Object cannot be resolved. It is indirectly referenced from required .class files    UnusedStub.java /google-play-services_lib/src/android   line 1  Java Problem