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Editorial Team
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Asked: 2026-06-07T00:47:35+00:00

I’m adding an android library project to my android app (in this case, Beintoo).

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I’m adding an android library project to my android app (in this case, Beintoo). It’s not mine; It’s an external library. However, it doesn’t come with a build.xml. Building in Eclipse works fine, but when I attempt to build my app with ant, I get this:

BUILD FAILED
C:\Sandbox\MyProject\build.xml:110: The following error occurred while executing this line:
C:\Sandbox\MyProject\build.xml:41: The following error occurred while executing this line:
C:\Program Files (x86)\Android\android-sdk\tools\ant\build.xml:515: Invalid file: C:\Git\Beintoo-Android\beintoo-android-sdk\BeintooSDK\build.xml

It’s perfectly true. The file is invalid, because it doesn’t exist. I wouldn’t know what to do to add it safely, nor if that’s even a good idea.

I have learnt that I can’t simply build the library project into a jar. How can I get my project to build in Ant with this library project?

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1 Answer

  1. Editorial Team

    Ok, so, Error 454’s answer was close, but not quite right. Since r14 of Android Tools, every library project must have it’s own build.xml if it is to be built by Ant, as noted here:

    https://groups.google.com/forum/?fromgroups#!topic/adt-dev/Z2e3dY-3Ma0

    Running android update lib-project (which, as Error 454 notes, is in the android-sdk/tools folder which should be in PATH) on the library project will add a generic build.xml, and allow the main project to build.

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