CODEWITHSUNDEEP
android-ndkjava-native-interface
hanaa
hanaa

Reputation: 405

Call a JNI method from another JNI method

Is it possible to call a JNI C function inside another JNI C function? (directly or indirectly), or, a JNI function inside a normal C function?

For example:

int inverse_transform(double real[], double imag[], size_t n) {
return Java_com_example_ffttest_FFTActivity_transform(imag, real, n);

}

and inverse_transform() is later called inside another method. 

JNIEXPORT jint JNICALL Java_com_example_ffttest_FFTActivity_convolve(...)
                     {
                          ....
                          inverse_transform();
                                }

Does this work? I tried but it gives me errors about parameters and I don't know how to use *env and obj.

Upvotes: 1

Views: 1182

Answers (2)

Seva Alekseyev
Seva Alekseyev

Reputation: 61408

Certainly it's possible. Those are just functions with funny names as far as C is concerned.

One word of caution though - if the JNI function uses its JNIEnv parameter, you need to pass a valid one from a non-JNI function.

Upvotes: 3

Yamen Ajjour
Yamen Ajjour

Reputation: 1432

At the end JNI methods are normal c++ methods so offcourse you can do it .

Upvotes: 0

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