Add Eigen library to NDK

[Eduardo Santamaría Vázquez]

Hi!

I'm triying to add Eigen library to my Andorid Projects to do some linear algebra operations. This library doesn't need to be compiled, just include the headers so I thought it would be easy, but i can't do it.  I've been looking for  information on this topic, but there isn't too much. I've tried to copy the folder with the headers in the NDK folder (..\Android\Sdk\ndk-bundle\sysroot\usr\include) buy it didn't work (Android Studio don't detect the fodler). How can i do it? 

Thank you in advance!

[Kenneth Geisshirt]

Hey Eduardo,

Do you plan to access the matrices from Java or only using it in your C++ code?

In Android Studio you can add support for C++ code in a project (see https://groups.google.com/forum/#!topic/android-ndk/3kAhx15wUXs), and then you can copy Eigen into your app's source code.

- Kenneth

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[Alex Cohn]

Well, modifying the NDK directories is not a particularly good idea. You are supposed to add the Eigen directory to your project (Android.mk or CMakeLists.txt, depending on your build tools). But an experiment shows that Android Studio finds the file sysroot\usr\include\q\qq.h, if it is included as #include "q/qqq.h".

BR,

Alex

[Kenneth Geisshirt]

Hi again,

I have created https://github.com/kneth/EigenDemo to show how you can add Eigen to your app. I am using git submodule to pull Eigen into the app.

- Kenneth