CodingForums.com - Java Not Playing Songs Within A function?

I am fairly new to java Ive only started yesterday I do have programming background with PHP! C++,HTML,CSS and Java Script.

Anyway I have written this out for an android development application and its not working, I want it to play a song it does it when Its inserted up the top of the page but not in a certain bracket, More info in in //Commenting in tne code

PHP Code:


		
			
package com.mycompany.myapp2;



import android.app.Activity;

import android.*;

import android.os.*;

import android.view.*;

import android.widget.*;

import android.widget.Button;

import android.widget.TextView;

import android.media.*;

import android.media.MediaPlayer;



public class MainActivity extends Activity { 

    //** called when the activity is first created 

    int counter;

    Button add,sub;

    TextView display;

    





    @Override





    public void onCreate(Bundle savedInstanceState) 





    { 

        super.onCreate (savedInstanceState);



        setContentView(R.layout.main); 

        counter = 0;

        add = (Button) findViewById(R.id.bAdd);

        sub = (Button) findViewById(R.id.bSub); 

        display = (TextView) findViewById(R.id.tvDisplay);

       it plays here?

    MediaPlayer mp3 = MediaPlayer.create(this, R.raw.son);

    mp3.start();

    

        add.setOnClickListener(new View.OnClickListener() {



                public void onClick(View v) {

                    

                    //ERROR BELLOW Wont excute here 

                    MediaPlayer mp3 = MediaPlayer.create(this, R.raw.son); 

                    

                    // Make the button do something 

                        

                    

                        

                    counter ++;

                    display.setText(" " + counter); 

                    

                    





                }







            });





        sub.setOnClickListener(new View.OnClickListener() {



                public void onClick(View v) {



                    // Take data away

                    counter --;

                    display.setText(" " + counter);





                }







            });











    }









}