Question

I’m trying to scan available wifi network through my Android device. Here’s the chunk of code –

WifiManager wifiManager = (WifiManager)getSystemService(WIFI_SERVICE);

                registerReceiver(new BroadcastReceiver() {
                    @Override 
                    public void onReceive(Context context, Intent intent) {
                        WifiManager wifiManager = (WifiManager)getSystemService(WIFI_SERVICE);
                        List<ScanResult> results = wifiManager.getScanResults(); 

                        //int newRSSI= intent.getIntExtra(wifiManager.EXTRA_NEW_RSSI, 0);
                        //WifiDistance wifi_dis = new WifiDistance();

                        for (ScanResult result : results) {

                            textView.append("\nSSID="+result.SSID + ", " + "Strength(dBm)=" + result.level + ", AP: "+ result.BSSID);
                            wifi+="\n"+result.SSID + ", " + result.level + ", "+ result.BSSID;


                            //WifiDistance.getWifiDistance().distanceCalc(result.BSSID, result.level);
                    }, 
                    new IntentFilter(WifiManager.SCAN_RESULTS_AVAILABLE_ACTION));

                    // Initiate a scan.
                wifiManager.startScan();

                }

I have put this under a action handler such as if a button is pressed it starts scanning. Now my problem is, when my phone is connected to a specific network it does not update the wifi scanning result automatically. It just stays with the older data. I want to press the button to start scanning and update the scan result every second.

I’m using OS 2.1 in HTC Magic.

Can anyone help me please?

Answer 1

Exactly how do you attempt to update the scan results every second?

it looks to me as you only update the list whenever a broadcast is received, and the startscan code appears after the List population.

Instead you could could use a timer task to update run a seperate method which updates the Scanresult list every second, and run the For-Loop again.

something like:

Public void RunEverySecond(){
List<ScanResult> results = wifiManager.getScanResults();

for (ScanResult result : results) {

                        textView.append("\nSSID="+result.SSID + ", " + "Strength(dBm)=" + result.level + ", AP: "+ result.BSSID);
                        wifi+="\n"+result.SSID + ", " + result.level + ", "+ result.BSSID;

                }
}

maybe?