NDK API reference docs? [closed]

Question

I'm looking for reference documentation for the NDK libraries, anyone know where to find them? not java APIs. I can't find any in the NDK directory or online.

Answer 1

Yes the API documentation of the NDK is very sparse. Most of the docmentation is in the docs folder of the NDK itself. Also the examples are helpful.

Try to read through the "standard" JNI documentation. (http://java.sun.com/docs/books/jni/) The Android NDK is basically just JNI. But the Android ndk does not need the special header magic if you name your function accordingly.

for example:

a java class:

 package com.example.foo;

 class Bar {
     native void jnistuff();
 }

where you call jnistuff the NDK will look for the method:

void Java_com_example_foo_Bar_jnistuff(JNIEnv* env, jobject *self)
{
  [...]
}

and automatically call it. Do not forget "extern C" if you use C++

Answer 2

The best documentation for NDK libraries is the folder with corresponding headers $NDK/platforms/android-n/arch-arm/usr/include. Do not overlook it.

As others have noted, $NDK/docs and http://developer.android.com/sdk/ndk/overview.html are also essential.