Jni android

jniRegisterNativeMethods

JNI_OnLoad

simplest sample in android

static jlong native_measureDirectory(JNIEnv* env, jobject /* clazz */, jstring directory) {
    jlong ret = 0L;

    return ret;
}


static const JNINativeMethod g_methods[] = {
    { "native_measureDirectory", "(Ljava/lang/String;)J", (void*)native_measureDirectory },
};


int register_com_android_defcontainer(JNIEnv *env) {
    if (jniRegisterNativeMethods(
            env, "com/android/defcontainer/MeasurementUtils", g_methods, NELEM(g_methods)) < 0) {
        return JNI_ERR;
    }


    return JNI_VERSION_1_6;
}


} // namespace android


int JNI_OnLoad(JavaVM *jvm, void* /* reserved */) {
    JNIEnv *env;


    if (jvm->GetEnv((void**)&env, JNI_VERSION_1_6)) {
        return JNI_ERR;
    }


    return android::register_com_android_defcontainer(env);