Android Studio & NDK: I got an error when "javah -d jni -classpath..."

Asked Dec 02 '14 at 15:14

Active Dec 02 '14 at 15:17

Viewed 4,362 times

The Point:

I want to call a C/C++ function from Java.

What I do:

I followed this direction. https://www.youtube.com/watch?v=0fEtrekNcOo

Just created Project, wrote below code and build it.

public native String HelloJNI();
static {
    System.loadLibrary("HelloJNI");
}

javah -d jni -classpath /Applications/adt-bundle-mac-x86_64-20131030/sdk/platforms/android-19/android.jar;../../build/intermediates/classes/debug com.test.ndktest.MyActivity

The Problem:

I got this error message. "bash: ../../build/intermediates/classes/debug: is a directory"

I spent many time to find solutions.. Any help will be appreciated.

Thanks.

C/C++ will be used for obfuscation of my code. I will hide some API keys in C/C++ code.
I watched another video but I could not find any solutions.. https://www.youtube.com/watch?v=okLKfxfbz40

edited Dec 02 '14 at 15:17

Seva Alekseyev

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asked Dec 02 '14 at 15:14

zono

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1

Try terminating /classes/debug with a /. Does it indeed contain your compiled package? – Seva Alekseyev Dec 02 '14 at 15:22
@Seva Alekseyev Thanks your comment. I tried '/' but not work. – zono Dec 02 '14 at 15:26
I can see some compiled classes in ../../build/intermediates/classes/debug/com/test/ndktest/ – zono Dec 02 '14 at 15:28
4

look at delimiter u use in classpath... ": or ; " You can CD to the parent of your package's classes and invoke 'javah' from there. wont need the multiple CP expression then – Robert Rowntree Dec 02 '14 at 16:13
3

@Robert Rowntree It worked!! I changed from ";" to ":". Thanks and I am sorry my stupid mistake. – zono Dec 02 '14 at 16:16
I could .h file. I may be able to proceed next step. Thanks again. If you post the answer, I can close this question. – zono Dec 02 '14 at 16:22
I watched the video which used ';'... anyway I will proceed to next – zono Dec 02 '14 at 16:26
did you ever get this working? – baash05 Jan 24 '16 at 13:30

Android Studio & NDK: I got an error when "javah -d jni -classpath..."

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