[android-developers] Re: NDK OpenGL - Mixing Java and Native (C) calls to OpenGL API?

On Jul 25, 4:25 pm, Indicator Veritatis <mej1...@yahoo.com> wrote:
> Although I think there is a way of making this work, I have to
> question why you would want to do this. It is the Java interface
> (including JSR-239)that is well tested in Android.

> Recall,http://developer.android.com/sdk/ndk/index.html#overviewsays:
>
> "The NDK will not benefit most applications. ... Typical good
> candidates for the NDK are self-contained, CPU-intensive operations
> that don't allocate much memory, such as signal processing, physics
> simulation, and so on."

I am processing large amounts of data and generating complex graphics
from it. Most of the work can be self contained in C, but it is useful
to add some non-computationally-intensive stuff in Java. Believe me, I
wouldn't go to NDK if I didn't have to - I made my living as a C
programmer before I made it as a Java programmer, and I far prefer
Java.

I have run performance tests and C is *dramatically* faster for my app
- in the compute-intensive areas.

BTW... I did an experiment since posting the question and the C and
Java co-existed quite well.

I suspect the GL object handed to the GLSurfaceView callback is just a
handle to the OpenGL library, with no context associated with it. If
that's true, the answer to my question is: YES.

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