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Editorial Team
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Asked: 2026-05-14T22:35:31+00:00

How do you setup a project that can result in a jar library file

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How do you setup a project that can result in a jar library file that can be used for android?
I want to create a custom library across all projects.

Few other questions:

  1. Does it need to be compiled against a specific version of android sdk?
  2. When an android package is compiled against a jar library does the classes necessary to work with the code get compiled with main code into the apk or does the entire jar get included?
  3. Any notable optimizations or pitfalls I need to know about with using a jar instead of integrating the code directly?
  4. Does the jar have to be signed like the apk needs to?
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1 Answer

  1. Editorial Team

    Google just release a new version of the SDK that handles Shared Libraries!

    https://developer.android.com/tools/projects/projects-eclipse.html#SettingUpLibraryProject

    ADT 0.9.7 (May 2010)

    Library projects:
    The ADT Plugin now
    supports the use of library projects
    during development, a capability that
    lets you store shared Android
    application code and resources in a
    separate development project. You can
    then reference the library project
    from other Android projects and, at
    build time, the tools compile the
    shared code and resources as part of
    the dependent applications. More
    information about this feature is
    available in the Developing in Eclipse
    with ADT document. If you are not
    developing in Eclipse, SDK Tools r6
    provides the equivalent library
    project support through the Ant build
    system.

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