Hi there
I am trying to invoke a c project in android for that i installed
android source code in ubuntu and generated an shared library of my c
project using the android source code,
Now i have to invoke my shared library inside android SDK and make it
to run my c project in that shared library,kindly suggest what to do
next.
On Jun 16, 9:20 pm, Roman <[email protected]> wrote:
> Hi Subram,
>
> I would try to spend some time in understand JNI. JNI calls are very
> costly also if your native code might be pretty fast. If you use JNI
> in the wrong way you program might run very flaky.
>
> Find information about JNI on
>
> http://java.sun.com/developer/onlineTraining/Programming/JDCBook/jni....
>
> You have to know that you have to write JAVA and C/C++ code to be able
> to use JNI functionality.
> On the Java level you are calling the wrapper methods which you have
> defined on the native level. The method signature format might be a
> little bit confusing but the usage is straight forward.
>
> Furthermore check out the following Android code which uses JNI
>
> /external/webkit/perf
>
> You find in the
>
> main.cpp how to setup JNI on Java level
>
> and in MyJavaVM.cpp how to write some wrapper methods which are
> calling the native code. Make sure that you do on the native level
> type checks on whatever you are passing down.
>
> Furthermore try to think about garbage collection and we it should
> take place!
>
> --
> Roman Baumgaertner
> Sr. SW Engineer-OSDC
> ·T· · ·Mobile· stick together
> The views, opinions and statements in this email are those of the
> author solely in their individual capacity, and do not necessarily
> represent those of T-Mobile USA, Inc.
>
> On Jun 15, 10:18 pm, subram <[email protected]> wrote:
>
> > Hi There
> > How to write a simple JNI that will print a message in the android
> > screen/do the operation specified in the shared library
>
> > Thanks in advance
> > Subram
> > On Jun 15, 3:42 pm, arunjith g <[email protected]> wrote:
>
> > > you will have to use JNI methods to invoke a call in shared library
> > > what u do is
>
> > > 1. Create a java class includes myfunC()
> > > 2. Create a jni header file from this class
> > > 3. It will have a jni_blahblah_myfunc call
> > > 4. create a c/c++ file giving implementation to this function by calling
> > > ur
> > > required shared library function
>
> > > On Mon, Jun 15, 2009 at 4:08 PM, subram <[email protected]> wrote:
>
> > > > Hi there
> > > > I am having an shared library named librecord.so, i have to
> > > > invoke this library inside the android project and make it to call by
> > > > the sdk,if any one came across with thisinvokingkindly suggest me
>
> > > > Thanks in advance
> > > > Subram
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