how to connect search on action bar and sqlite database?

Question

I am new on developing an android app. I am already following the code in this website.I wonder how to connect search on action bar that can search data on sqlite database?

This is my MainActivity.java

    public class MainActivity extends Activity implements SearchView.OnQueryTextListener {
    // More code
    }

    @Override
    public boolean onQueryTextChange(String newText) {
        // TODO Auto-generated method stub
        return false;
    }

    @Override
    public boolean onQueryTextSubmit(String query) {
        // TODO Auto-generated method stub
        return false;
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        MenuInflater inflater = getMenuInflater();
        inflater.inflate(R.menu.options_menu, menu);

        // Associate searchable configuration with the SearchView
        SearchManager searchManager = (SearchManager) getSystemService(Context.SEARCH_SERVICE);
        SearchView searchView = (SearchView) menu.findItem(R.id.search).getActionView();
        searchView.setSearchableInfo(searchManager.getSearchableInfo(getComponentName()));

        return super.onCreateOptionsMenu(menu);
    }
} 

This is my SearchResultsActivity.java

public class SearchResultsActivity extends Activity {

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

        handleIntent(getIntent());      
    }

    @Override
    protected void onNewIntent(Intent intent) {
        //super.onNewIntent(intent);
        setIntent(intent);
        handleIntent(intent);
    }

    private void handleIntent(Intent intent) {
        if (Intent.ACTION_SEARCH.equals(intent.getAction())) {
            String query = intent.getStringExtra(SearchManager.QUERY);
            // use the query to search your data somehow

            ListView listView = (ListView) findViewById(R.id.listView1);
            DatabaseHandler db = new DatabaseHandler(this);
            listView.setAdapter(null);
            db.searchContacts(query);

        }
    }

}