在Android的ListView中对连接的WiFi进行排序

Question

I am displaying available wifi in listview and I am connecting to wifi.. using dialog box in my android app..once wifi connected how to display that wifi name as first in listview..I want to display connected wifi as first in Listview..How can I do this?

    TextView textView = (TextView)view.findViewById(R.id.Name);
     textView.setText(accessPoints.get(i);
     textView.setOnClickListener(
     new View.OnClickListener() {

        @Override
        public void onClick(View view) {
        final Dialog dialog =new Dialog(getActivity());
        dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
        Window window = dialog.getWindow();
        dialog.setContentView(R.layout.password_dialog);
        final Button connect = (Button)dialog.findViewById(R.id.connect);
        Button cancel = (Button)dialog.findViewById(R.id.cancel);
        connect.setOnClickListener(
        new View.OnClickListener() {

          @Override
           public void onClick(View view) {
           list<WifiConfiguration> list = wifiManager.getConfiguredNetworks();
           for( WifiConfiguration i : list ) {
           if(i.SSID != null && i.SSID.equals("\"" + networkSSID + "\"")) {
           wifiManager.disconnect();
           wifiManager.enableNetwork(i.networkId, true);
           wifiManager.reconnect();               
           break;
         }
        }
       }

Answer 1

The WifiManager class has a method getConnectionInfo() , which will return the WifiInfo object for the current connection. You can check the SSID String of this wifi and compare it with the WifiConfiguration list using a simple Java Comparator like this:

public static class WifiComparator implements Comparator<WifiConfiguration> {

    WifiInfo connectedInto;

    public WifiComparator(WifiInfo connectedInto) {
        this.connectedInto = connectedInto;
    }

    @Override
    public int compare(WifiConfiguration lhs, WifiConfiguration rhs) {
        if (connectedInto == null)
            return 0;
        else {
            if (lhs.SSID.equals(connectedInto.getSSID()))
                return 1;
            return 0;
        }
    }
}

and then just sort the list by calling

Collections.sort(list, new WifiComparator(wifiManager.getConnectionInfo()));