add multiple choice list into fragment when button clicked in an activity

Question

I have an activity containing list view and a button at the bottom. When the button is clicked I need to open a fragment containing multiple choice list view and a button at the bottom... Now when I click the button in the fragment I need to get back to the same activity.

and

Help me to add fragment layout and fragment in my activity...

this is my activity code

public class MainActivity2 extends Activity implements
        OnItemClickListener  {
    int shop_len;
    String[] chennai,mumbai,calcutta;
    String[] desc_chennai,desc_mumbai,desc_calcutta;

    ListView listView2;
    List<Item2> rowItems2;
    Button button;

    /**
     * Called when the activity is first created.
     */
    @Override
    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main2);
        String city = getIntent().getExtras().getString("CNAME");
        chennai = getResources().getStringArray(R.array.area_chennai);
        mumbai = getResources().getStringArray(R.array.area_mumbai);
        calcutta = getResources().getStringArray(R.array.area_calcutta);
        shop_len=getResources().getStringArray(R.array.area_shop).length;
        desc_chennai = new String[]{String.valueOf(shop_len),String.valueOf(shop_len),String.valueOf(shop_len)};
        desc_mumbai = new String[]{String.valueOf(shop_len),String.valueOf(shop_len),String.valueOf(shop_len),String.valueOf(shop_len)};
        TextView cityname = (TextView) findViewById(R.id.name);
        cityname.setText("City: "+city);



        if (city.equals("Chennai")) {
            rowItems2 = new ArrayList<Item2>();
            for (int i = 0; i < chennai.length; i++) {
                Item2 item = new Item2(chennai[i], desc_chennai[i]);
                rowItems2.add(item);
            }

            listView2 = (ListView) findViewById(R.id.list2);
            CustomListViewAdapter2 adapter2 = new CustomListViewAdapter2(this,
                    R.layout.list_item2, rowItems2);
            listView2.setAdapter(adapter2);
            listView2.setOnItemClickListener(this);

        }else if(city.equals("Mumbai")){
            rowItems2 = new ArrayList<Item2>();
            for (int i = 0; i < mumbai.length; i++) {
                Item2 item = new Item2(mumbai[i], desc_mumbai[i]);
                rowItems2.add(item);
            }

            listView2 = (ListView) findViewById(R.id.list2);
            CustomListViewAdapter2 adapter2 = new CustomListViewAdapter2(this,
                    R.layout.list_item2, rowItems2);
            listView2.setAdapter(adapter2);
            listView2.setOnItemClickListener(this);
        }else if(city.equals("Calcutta")){
            rowItems2 = new ArrayList<Item2>();
            for (int i = 0; i < mumbai.length; i++) {
                Item2 item = new Item2(mumbai[i], desc_mumbai[i]);
                rowItems2.add(item);
            }

            listView2 = (ListView) findViewById(R.id.list2);
            CustomListViewAdapter2 adapter2 = new CustomListViewAdapter2(this,
                    R.layout.list_item2, rowItems2);
            listView2.setAdapter(adapter2);
            listView2.setOnItemClickListener(this);
        }

        button = (Button) findViewById(R.id.filterbutton);
        button.setOnClickListener(new View.OnClickListener() {
            public void onClick(View arg0) {

                // Start NewActivity.class
                Intent myIntent = new Intent(MainActivity2.this,
                        FilterActivity.class);
                startActivity(myIntent);
                overridePendingTransition(R.anim.slide_in_up, R.anim.slide_out_up);
            }
        });
    }
    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

    }
}

layout of the activity:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >
    <TextView android:id="@+id/name"
        android:layout_width="fill_parent"
        android:layout_height="40dp"

        android:textSize="20dip"
        android:textStyle="bold"/>
    <ListView
        android:id="@+id/list2"
        android:layout_width="match_parent"
        android:layout_height="460dp"
        />
    <Button
        android:id="@+id/filterbutton"
        android:layout_width="100dp"
        android:layout_height="50dp"
        android:layout_gravity="center"

        android:text="@string/filter" />
</LinearLayout>

Now where do I add my fragment layout in this XML and how to add fragment in my activity?