如何获得所有连接网络的BSSID？

Question

i have used the below code but it was working well but after some month i am getting a result as any instead of getting BSSID value. here is my code. please guide me any other alternative way.

 @SuppressLint("LongLogTag")
public void loadWifiAvailableList() {
    WifiManager wifiMan = (WifiManager) getApplicationContext().getSystemService(
            Context.WIFI_SERVICE);
    WifiInfo wifiInfo = wifiMan.getConnectionInfo();

    String macAddr = wifiInfo.getMacAddress();
    String bssid = wifiInfo.getBSSID();
   //here i am getting the proper bssid
    Log.d("bssid from get connection info",bssid);

    List<WifiConfiguration> list = wifiMan.getConfiguredNetworks();
    for( WifiConfiguration i : list ) {
        if(i.BSSID!=null)
     //here i am getting any from i.BSSID
        Log.d("bssid from get configured network",i.BSSID);

    }
}

Answer 1

I have also got the same problem. I solved it by the help of broadcast receiver and build my own logic around it.

Broadcast Receiver class, make sure for provided permissions ACCESS_WIFI_STATE and CHANGE_WIFI_STATE in manifest.

public class WifiChecker extends BroadcastReceiver {

    private OnWifiResultArrived onWifiResultArrived = null;
    private static boolean CAN_CALL_AGAIN = true;
    private WifiManager wifiManager;

    /**
     * @param context context of activity.
     * Remember to provide permission
     * <p>
     * {@code <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />},
     * {@code <uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />}</p>
     */
    @SuppressLint("MissingPermission")
    public WifiChecker(Context context) {
        CAN_CALL_AGAIN = true;
        wifiManager = (WifiManager) context.getApplicationContext().getSystemService(Context.WIFI_SERVICE);
        context.registerReceiver(this, new IntentFilter(WifiManager.SCAN_RESULTS_AVAILABLE_ACTION));
        wifiManager.startScan();

        rerunAgain();
    }

    private void rerunAgain() {
        new Handler().postDelayed(new Runnable() {
            @SuppressLint("MissingPermission")
            @Override
            public void run() {
                if (CAN_CALL_AGAIN)
                    wifiManager.startScan();

                rerunAgain();       //rerun the broadcast again
            }
        }, 1000);
    }

    public void addListerForWifiCallback(OnWifiResultArrived onWifiResultArrived) {
        this.onWifiResultArrived = onWifiResultArrived;
    }


    @SuppressLint("MissingPermission")
    @Override
    public void onReceive(Context context, Intent intent) {
        updateUi(wifiManager.getScanResults());
    }

    private void updateUi(final List<ScanResult> scanResults) {

        try {
            new Handler().postDelayed(new Runnable() {
                @Override
                public void run() {
                    try {
                        if (onWifiResultArrived != null)

                            onWifiResultArrived.isInWifiRange(scanResults);
                    } catch (Exception e) {
                        e.printStackTrace();
                    }

                }
            }, 1000);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public void unregisterListner(Context context) {
        this.onWifiResultArrived = null;
        CAN_CALL_AGAIN = false;
    }

    public interface OnWifiResultArrived {
        void isInWifiRange(List<ScanResult> scanResults);
    }
}

User of Broadcast class Either implement the broadcast receiver class interface ie, OnWifiResultArrived

WifiChecker checker = new WifiChecker(this);
checker.addListerForWifiCallback(this);

@Override
public void isInWifiRange(List<ScanResult> scanResults){
    //get your BSSID here
    scanResults.get(position).BSSID;
    //write your logic for checking weather it is connected or not
}

or

WifiChecker checker = new WifiChecker(this);
checker.addListerForWifiCallback(@Override
public void isInWifiRange(List<ScanResult> scanResults){
    //get your BSSID here
    scanResults.get(position).BSSID;
   //write your logic for checking weather it is connected or not
});

Answer 2

To get BSSID for currently connected WIFI network, use WiFiInfo class.

WifiManager wifiMan = (WifiManager) context.getSystemService(
                        Context.WIFI_SERVICE);
        WifiInfo wifiInfo = wifiMan.getConnectionInfo();

        String macAddr = wifiInfo.getMacAddress();
        String bssid = wifiInfo.getBSSID();

Answer 3

I have found out some solution why am i getting any or null string in getConfiguredNetworks() api in android. the reason behind is if we have the same SSID and same password at some scenario it is sending as any or null string. so getConfiguredNetworks() is not a right method when you are trying to connect with same ssid. so use getScanResults() Api instead of getConfiguredNetworks() . After some own research i have found it out. This problem will occur only when you get an AP list with same ssid and password .use the scan result and add that network in wifi configuration then connect it but this method was deprecated in API level 26 . so it wont work from api level 26 . reference link

  //https://stackoverflow.com/a/8818490
        wifiManager = (WifiManager) getApplicationContext().getSystemService(Context.WIFI_SERVICE);

        //checking the right network.
        List<ScanResult> scanresults = wifiManager.getScanResults();
        {
            for (ScanResult scanresult : scanresults) {
                Log.d("scan result1", scanresult.BSSID + "");
 }}


 WifiConfiguration conf = new WifiConfiguration();
    conf.SSID = "\"" + networkSSID + "\"";
    conf.BSSID = Bssid;
  WifiManager wifiManager = (WifiManager)getApplicationContext().getSystemService(Context.WIFI_SERVICE);
  ///this wont work from api level 26
    wifiManager.addNetwork(conf);
    List<WifiConfiguration> list = wifiManager.getConfiguredNetworks();
    for (WifiConfiguration i : list) {
        if (i.BSSID != null && i.BSSID.equals(Bssid)) {
            wifiManager.disconnect();
            wifiManager.enableNetwork(i.networkId, true);
            wifiManager.reassociate();
            Log.d("changing network", "connecting the right network");
            break;
        }

    }