How to Connect to a Specific Wi-Fi Network in Android Programmatically

How do I connect to a specific Wi-Fi network in Android programmatically?

You need to create WifiConfiguration instance like this:

String networkSSID = "test";
String networkPass = "pass";

WifiConfiguration conf = new WifiConfiguration();
conf.SSID = "\"" + networkSSID + "\"";   // Please note the quotes. String should contain ssid in quotes

Then, for WEP network you need to do this:

conf.wepKeys[0] = "\"" + networkPass + "\""; 
conf.wepTxKeyIndex = 0;
conf.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE);
conf.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.WEP40); 

For WPA network you need to add passphrase like this:

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

For Open network you need to do this:

conf.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE);

Then, you need to add it to Android wifi manager settings:

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

And finally, you might need to enable it, so Android connects to it:

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;
    }           
 }

UPD: In case of WEP, if your password is in hex, you do not need to surround it with quotes.

Connecting to a specific wifi network programmatically in Android (API 30)

You can use gently ask your users to turn on the wifi by using the new Settings.Panel (API 29+) or the old Settings API. Additionally, you can use startActivityForResult() to check if the user did turn on the Wifi from the Settings.

if(!wifiManager.isWifiEnabled()) {
    if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
        startActivity(new Intent(Settings.Panel.ACTION_WIFI));
    } else {
        // Use a full page activity - if Wifi is critcal for your app
        startActivity(new Intent(Settings.ACTION_WIFI_SETTINGS));
        // Or use the deprecated method
        wifiManager.setWifiEnabled(true)
    }
} 

Connect to Wifi in Android Q programmatically

So, the solution for me is compile your app with targetSdkVersion 28.
and for connection to wifi use this function

connectToWifi(String ssid, String key)

it's just a workaround for the moment, waiting Google to publish a fix for this bug, for more information the issue reported to Google : issuetracker.google.com/issues/138335744

public void connectToWifi(String ssid, String key) {

Log.e(TAG, "connection wifi pre Q");
WifiConfiguration wifiConfig = new WifiConfiguration();
wifiConfig.SSID = "\"" + ssid + "\"";
wifiConfig.preSharedKey = "\"" + key + "\"";
int netId = wifiManager.addNetwork(wifiConfig);
if (netId == -1) netId = getExistingNetworkId(wifiConfig.SSID);

    wifiManager.disconnect();
    wifiManager.enableNetwork(netId, true);
    wifiManager.reconnect();
}

How to connect to WiFi programmatically

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;
        }
    }

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