How do i call C/C++ code from Android using JNA? -


i'm trying integrate specific library android project, , library written in c/c++. i've miraculously gotten ndk-build give me needed .so file.

however, looking @ it, there's sample in project, , use mysterious .jar api bindings of .c/c++ files.

how either

  • create special .jar file has api, based on .so?

or

  • directly add method main c++ file , call java?

i've tried re-wrap things using jni, doesn't seem work. keep getting unsatisfiedlinkerror.

a lot of documentation online uses jni tutorial. i'm happy few links tutorials on jna.

jna provides stub native library, libjnidispatch.so variety of platforms. can build library yourself, or extract 1 of pre-built binaries project's lib/native/<platform>.jar packages.

you include libjnidispatch.so in android project way other jni library. required; cannot rely on jna dynamically unpack , use native library automatically on other platforms. jna project includes details doing so (as instructions building libjnidispatch.so yourself).

you use jna.jar other java jar file, , write own (java) mappings match native library you're trying access. there's jna-min.jar omits native platform libraries bundled in jna.jar.


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