How to connect to WiFi programmatically

Question

I am trying to connect to a new wifi network using an app and not android wifi settings with following code, but it seems that relevant android sdk classes only let you conn

Answer 1

I just got this working with my home WiFi network with WPA2 authentication.

Your disconnect code works fine as is. I was able to repeatedly connect and disconnect with the buttons.

For your WEP network, try this:

public boolean ConnectToNetworkWEP( String networkSSID, String password )
{
    try {
        WifiConfiguration conf = new WifiConfiguration();
        conf.SSID = "\"" + networkSSID + "\"";   // Please note the quotes. String should contain SSID in quotes
        conf.wepKeys[0] = "\"" + password + "\""; //Try it with quotes first

        conf.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE);
        conf.allowedGroupCiphers.set(WifiConfiguration.AuthAlgorithm.OPEN);
        conf.allowedGroupCiphers.set(WifiConfiguration.AuthAlgorithm.SHARED);


        WifiManager wifiManager = (WifiManager) this.getApplicationContext().getSystemService(Context.WIFI_SERVICE);
        int networkId = wifiManager.addNetwork(conf);

        if (networkId == -1){
            //Try it again with no quotes in case of hex password
            conf.wepKeys[0] = password;
            networkId = wifiManager.addNetwork(conf);
        }

        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;
            }
        }

        //WiFi Connection success, return true
        return true;
    } catch (Exception ex) {
        System.out.println(Arrays.toString(ex.getStackTrace()));
        return false;
    }
}

Here is the code that worked for me on WPA2:

public boolean ConnectToNetworkWPA( String networkSSID, String password )
    {
        try {
            WifiConfiguration conf = new WifiConfiguration();
            conf.SSID = "\"" + networkSSID + "\"";   // Please note the quotes. String should contain SSID in quotes

            conf.preSharedKey = "\"" + password + "\"";

            conf.status = WifiConfiguration.Status.ENABLED;
            conf.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.TKIP);
            conf.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.CCMP);
            conf.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.WPA_PSK);
            conf.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.TKIP);
            conf.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.CCMP);

            Log.d("connecting", conf.SSID + " " + conf.preSharedKey);

            WifiManager wifiManager = (WifiManager) this.getApplicationContext().getSystemService(Context.WIFI_SERVICE);
            wifiManager.addNetwork(conf);

            Log.d("after connecting", conf.SSID + " " + conf.preSharedKey);



            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();
                    Log.d("re connecting", i.SSID + " " + conf.preSharedKey);

                    break;
                }
            }


            //WiFi Connection success, return true
            return true;
        } catch (Exception ex) {
            System.out.println(Arrays.toString(ex.getStackTrace()));
            return false;
        }
    }