Android ndk : Problem for call of Java method from c++ with jni

Question

I try to work on Android NDK, my first test are not very conclusive, I need for help because I don\'t see where is my error.

The following code compiles without problem

Answer 1

What you have looks okay to me... but you might try replacing

jclass clazz = env->FindClass("com/test/jnitest/JNITestActivity");

With

jclass clazz = env->GetObjectClass(obj);

Answer 2

After one day lost due to this bug, i finally found the solution of my problem :

The function javaCallJNI() is declared as a static native in Java, but, a static method can't call a non static method...

For resolve this problem, just replace :

public static native void javaCallJNI();

by

public native void javaCallJNI();

in JNITestActivity.java

Thank for your help and see soon ;)