Calling Android native functions from Cocos2d-x v3.0

AppActivity.java

package org.cocos2dx.cpp;

import org.cocos2dx.lib.Cocos2dxActivity;
import org.cocos2dx.lib.Cocos2dxGLSurfaceView;

import android.util.Log;

public class AppActivity extends Cocos2dxActivity {

	public Cocos2dxGLSurfaceView onCreateView() {
		Cocos2dxGLSurfaceView glSurfaceView = new Cocos2dxGLSurfaceView(this);
		glSurfaceView.setEGLConfigChooser(5,6,5,0,16,8);
		return glSurfaceView;
	}
	
	public static void myStaticMethod() {
        Log.d("AppActivity", "myStaticMethod()");
    }
}

HelloWorld.cpp

// Imports

#if (CC_TARGET_PLATFORM == CC_PLATFORM_ANDROID)
  #include <jni.h>
  #include "platform/android/jni/JniHelper.h"
#endif

// Selector

void HelloWorld::SampleSelector()
{
  #if (CC_TARGET_PLATFORM == CC_PLATFORM_ANDROID)
    JniMethodInfo t;
    if (JniHelper::getStaticMethodInfo(t, "org/cocos2dx/cpp/AppActivity", "myStaticMethod", "()V"))
    {
      CCLOG("[MyScene::init] CallStaticVoidMethod");
      t.env->CallStaticVoidMethod(t.classID,t.methodID);
      CCLOG("[MyScene::init] CallStaticVoidMethod DONE!");
    } 
    else 
    {
      CCLOG("[MyScene::init] CallStaticVoidMethod CAN'T DO!");
    }
  #endif
}