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.


Comments

Post a Comment

Popular posts from this blog

android - MPAndroidChart - How to add Annotations or images to the chart -

i working latest mpandroidchart library , looking way add annotations or images clickable. example: once data reaches value event occurs want able display user - there multiple events can occur annotations (not sure if right word) or image added @ point in chart. any pointers welcome. check documentation of yaxis . focus on setspacetop(...) , setaxismaxvalue(...) methods. for background: bar-shadow , disable calling: barchart.setdrawbarshadow(false) or change color: bardataset.setbarshadowcolor(int color)
Read more

javascript - Add class to another page attribute using URL id - Jquery -

i have attached id url. ex: when click link 1 , has #tab-2 id , takes me landing page. in landing page have find element has #tab-2 id have add class .active . i tried no luck. please 1 correct code. thanks js fiddle link html <div class="menu"> <ul> <li><a href="http://jsfiddle.net/gscyoa0j/1/#tab-2">link 1</a></li> <li><a href="http://jsfiddle.net/gscyoa0j/1/#tab-44">link 2</a></li> <li><a href="http://jsfiddle.net/gscyoa0j/1/#tab-74">link 3</a></li> </ul> </div> landing page <div class="tab"> <ul> <li><a id="tab-2" class="active" >link 1 content</a></li> <li><a id="tab-44" >link 2 content</a></li> <li><a id="tab-74" >link 3 content</a></l...
Read more

firefox - Where is 'webgl.osmesalib' parameter? -

i'm trying webgl running on firefox (v37.0.2) via software acceleration mesa. tried following steps have been stated in article: http://www.binarytides.com/enable-webgl-firefox-ubuntu/ however, unable find parameter named ' webgl.osmesalib ' in about:config section? has been removed (or renamed)? if yes, how should instruct firefox use mesa's software acceleration webgl? looks support osmesa removed in favour llvmpipe.
Read more