Display ListView with available networks

I'm trying to populate a ListView with the List returned by the getScanResults() method of the WifiManager class. However, I would not want to have to go through this list, after all, all the information I need is already in it. However, by passing this list directly to this method, it displays all properties of the ScanResult class for each item. I would like to be able to display only the SSID.

package tk.joaoeduardo.metropolitano;

import android.app.Activity;
import android.content.Context;
import android.net.wifi.ScanResult;
import android.net.wifi.WifiManager;
import android.os.Bundle;
import android.widget.ArrayAdapter;
import android.widget.ListView;

public class Main extends Activity {

    private ListView list;
    private WifiManager wifi;
    private ArrayAdapter<ScanResult> adapter;

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

    }

    protected void onStart() {

        super.onStart();

        list = (ListView) findViewById(R.id.list);

        wifi = (WifiManager) getSystemService(Context.WIFI_SERVICE);

        adapter = new ArrayAdapter<ScanResult>(this, android.R.layout.simple_list_item_1);

    }

    protected void onResume() {

        super.onResume();

        adapter.addAll(wifi.getScanResults());

        list.setAdapter(adapter);

    }

    protected void onPause() {

        super.onPause();

        list = null;

        wifi = null;

        adapter = null;

    }

}