ارسال آیتم های انتخاب شده در یک multiple choise list به یک activity دیگر

سلام و خسته نباشید
چجوری باید این کار رو انجام بدم؟

package com.enima.hi;



import android.os.Bundle;

import android.app.ListActivity;

import android.content.Intent;

import android.util.SparseBooleanArray;

import android.view.Menu;

import android.view.MenuItem;

import android.view.View;

import android.widget.ArrayAdapter;

import android.widget.ListView;

import android.widget.Toast;



public class MainActivity extends ListActivity {

    private static final String[] items={

            "Nima","shahram","shiva","ava","saman","sima","mah  an","avesta","mohsen","taghi","gholi","hasan","sah  ra","shadi","leyla"

    };

    SparseBooleanArray checked;

    String[] selected=new String[items.length];

    Boolean[] s=new Boolean[items.length];

    Intent intent;

    int b=0;



    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        

        setListAdapter(new ArrayAdapter<String>(this,

                android.R.layout.simple_list_item_multiple_choice,

                items));  

    }

    

    

    

    

  @Override

protected void onListItemClick(ListView l, View v, int position, long id) {

    // TODO Auto-generated method stub

    Toast.makeText(getApplicationContext(),"You have selected : \" "+ items[position]+" \"   "+l.getCheckedItemIds(), Toast.LENGTH_SHORT).show();

    

    b=0;

    

    



    checked=l.getCheckedItemPositions();

    

    for(int i=0;i<checked.size();i++){

        if(checked.valueAt(i)==true){

            selected[b]=items[i];

            b++;

        }

            

    }

    

    

}





    @Override

    public boolean onCreateOptionsMenu(Menu menu) {

        // Inflate the menu; this adds items to the action bar if it is present.

        getMenuInflater().inflate(R.menu.main, menu);

        return true;

    }

    

    @Override

    public boolean onOptionsItemSelected(MenuItem item) {

        // TODO Auto-generated method stub

        

        

        if( item.getItemId() == R.id.senddata){

            

            Bundle b= new Bundle();

            b.putStringArray("key", selected);

            intent=new Intent(this, f2.class);

            intent.putExtras(b);

            



            

            startActivity(intent);

            //Toast.makeText(getApplicationContext(), selected[0]+selected[1]+selected[2]+selected[3]+selected[4], Toast.LENGTH_SHORT).show();

        }

        

        return super.onOptionsItemSelected(item);

    }

    



   

    

    

    

}

این هم از کد اون یکی activity
ولی جواب اشتباهی میده!

package com.enima.hi;



import java.util.Arrays;



import android.app.Activity;

import android.content.Intent;

import android.os.Bundle;

import android.widget.TextView;

import android.widget.Toast;



public class f2 extends Activity {

    

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        // TODO Auto-generated method stub

        super.onCreate(savedInstanceState);

        

        

        TextView tv=new TextView(this);

        Bundle b=this.getIntent().getExtras();

        String[] array=b.getStringArray("key");

        tv.setText(Arrays.toString(array));



        setContentView(tv);

    }



}