how to have just one activity with tabhost?

My main_activity is a tabhost. I want when I click tabs go to a activity without tabs on top. main_activity:

public class main_activity extends TabActivity {

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        Resources ressources = getResources();
        TabHost tabHost = getTabHost();

        Intent intentEdit = new Intent().setClass(this, EditActivity.class);
        TabSpec tabSpecEdit = tabHost
                .newTabSpec("Edit")
                .setIndicator("", ressources.getDrawable(R.drawable.ic_edit))
                .setContent(intentEdit);

        Intent intentDelete = new Intent().setClass(this, DeleteActivity.class);
        TabSpec tabSpecDelete = tabHost
                .newTabSpec("Delete")
                .setIndicator("", ressources.getDrawable(R.drawable.ic_delete))
                .setContent(intentDelete);

        Intent intentAdd = new Intent().setClass(this, AddActivity.class);
        TabSpec tabSpecAdd = tabHost
                .newTabSpec("Add")
                .setIndicator("", ressources.getDrawable(R.drawable.ic_add))
                .setContent(intentAdd);

        tabHost.addTab(tabSpecEdit);
        tabHost.addTab(tabSpecDelete);
        tabHost.addTab(tabSpecAdd);
    }
}

and one of tabs activities:

public class AddActivity extends Activity {
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.add);
    }
}

main.xml:

<?xml version="1.0" encoding="utf-8"?>
<TabHost xmlns:android="http://ift.tt/nIICcg"
    android:id="@android:id/tabhost"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">
    <LinearLayout
        android:orientation="vertical"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:padding="5dp">
        <TabWidget
            android:id="@android:id/tabs"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content" />
        <FrameLayout
            android:id="@android:id/tabcontent"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:padding="5dp" />
    </LinearLayout>
</TabHost>