Programatically connected android device to Hotspot (no internet) switches back to wifi with internet

Sorry for my english. I am writing a code to connect to another android device hotspot. It gets connected. But, the hotspot will have no internet in my case. Now the connected device, switches back to another wifi network with internet. Is there any better way to connect to hotspot other than my way? My code is below:

@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.layout);
    AppCompatButton btnConnect=findViewById(R.id.btnConnect);
    btnConnect.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            registerReceiver(mWifiBroadcastReceiver , new IntentFilter("android.net.wifi.STATE_CHANGE"));
            EditText eSSID=findViewById(R.id.ssid);
            EditText ePassword=findViewById(R.id.password);
            String ssid = eSSID.getText().toString();
            String key = ePassword.getText().toString();
            WifiConfiguration wifiConfig = new WifiConfiguration();
            wifiConfig.SSID = String.format("\"%s\"" , ssid);
            wifiConfig.preSharedKey = String.format("\"%s\"" , key);
            connectivityManager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
            wifiManager = (WifiManager) getApplicationContext().getSystemService(WIFI_SERVICE);

            int netId = wifiManager.addNetwork(wifiConfig);
            wifiManager.disconnect();
            wifiManager.enableNetwork(netId , true);
            wifiManager.reconnect();
        }
    });


}

And the receiver is:

  private BroadcastReceiver mWifiBroadcastReceiver = new BroadcastReceiver() {
    @Override
    public void onReceive(final Context context , Intent intent) {
        switch (intent.getAction()) {
            case WifiManager.NETWORK_STATE_CHANGED_ACTION:
                NetworkInfo info = intent.getParcelableExtra(WifiManager.EXTRA_NETWORK_INFO);
                boolean isConnected = info.isConnected();
                boolean isConnecting = info.isConnectedOrConnecting();

                //TODO: probably better to use the EXTRA_ info here
                String ssid = wifiManager.getConnectionInfo() != null ?
                        wifiManager.getConnectionInfo().getSSID() : null;


                ssid = normalizeAndroidWifiSsid(ssid);

                String stateName = "";
                switch (info.getState()) {
                    case CONNECTED:
                        stateName = "connected";
                        break;

                    case CONNECTING:
                        stateName = "connecting";
                        break;

                    case DISCONNECTED:
                        stateName = "disconnected";
                        break;

                    case DISCONNECTING:
                        stateName = "disconnecting";
                        break;

                    case SUSPENDED:
                        stateName = "suspended";
                        break;

                    case UNKNOWN:
                        stateName = "unknown";
                        break;
                }


                if (Build.VERSION.SDK_INT >= 21) {
                    if (isConnected) {
                        NetworkRequest.Builder builder = new NetworkRequest.Builder();
                        builder.addTransportType(NetworkCapabilities.TRANSPORT_WIFI);
                        builder.addCapability(NetworkCapabilities.NET_CAPABILITY_CAPTIVE_PORTAL);
                        final String connectedSsid = ssid;
                        connectivityManager.registerNetworkCallback(builder.build() , new ConnectivityManager.NetworkCallback() {
                            @Override
                            public void onAvailable(Network network) {
                                super.onAvailable(network);
                                NetworkInfo networkInfo = connectivityManager.getNetworkInfo(network);

                                //This is always the SSID if it's wifi, even though this is *not* documented
                                String networkSsid = networkInfo.getExtraInfo();

                                if (networkSsid.equals(connectedSsid)) {
                                    runOnUiThread(new Runnable() {
                                        @Override
                                        public void run() {
                                            Toast.makeText(context,"Connected Successfully",Toast
                                                    .LENGTH_LONG).show();
                                        }
                                    });

                                    /*
                                     * We can now use network.openURLConnection and network.getSocketFactory()
                                     * to communicate using the wifi network that has no Internet
                                     */
                                    connectivityManager.unregisterNetworkCallback(this);
                                }
                            }
                        });

                    }
                }

                break;
        }
    }
};

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