NDK JNI Android with C++

//------------THIS IS MYACTIVITY------------------

package com.game.demo;

import android.app.Activity;
import android.os.Bundle;

public class MyActivity extends Activity
{
	
	
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
		setContentView(new MyView(this));
		
    }
	
	static {
        System.loadLibrary("ndk_demo");
    }	
}

//-------------- THIS IS MYVIEW ------------------------
package com.game.demo;

import android.widget.TextView;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Typeface;

public class MyView extends TextView
{	public int x=10;
	public int y=15;
	public static Paint m_sp = null;

	public MyView(Context context)
    {
    	super(context);     	  	
    }
	
	protected void onDraw (Canvas canvas)
    {
    	canvas.drawColor(0xFFFDCBFE);	
    	
		m_sp = new Paint();
		
      	try
		{
    		if (m_sp != null)
    		{
    			canvas.drawColor(0xFFFDCBFE);
    			canvas.drawText("HELLO JNI di JAVA View", 100, 100, m_sp);
				canvas.drawText("Ini variabel x :"+x, 100, 110, m_sp);
				canvas.drawText("Ini variabel y :"+y, 100, 120, m_sp);
    		}
			PrintString();	
			System.out.println("This line executed after PrintString()");			
		}
		catch(Exception e)
		{
			System.out.println("..... " + e.getMessage());
		}
    	
    }
	
	public static native void PrintString();
}

//---------- THIS IS JNIDemo.cpp --------------------

#include <stdio.h>
#ifndef ANDROID
#include <windows.h>
#include <tchar.h>
#endif

#ifdef ANDROID
#include <jni.h>
#include <android/log.h>

extern "C" {
	JNIEXPORT void JNICALL Java_com_game_demo_MyView_PrintString (JNIEnv *env, jobject obj);
};
#endif

void PrintStringC()
{
#ifdef ANDROID
	__android_log_print(ANDROID_LOG_INFO, "PRINT_STRING" ,"");
#endif
	printf ("Hello JNI p\n");
}

#ifndef ANDROID
int _tmain(int argc, _TCHAR* argv[])
{
	PrintStringC();
	getchar();
	return 0;
}
#endif

#ifdef ANDROID
void 
Java_com_game_demo_MyView_PrintString (JNIEnv *env, jobject obj) 
{	
	PrintString();
}
#endif