He escrito el código para crear un punto de acceso para dispositivos Android. He probado tanto en el emulador como en el dispositivo real. Pero no funciona. ¿Dónde me equivoqué?

public class MainWAP extends Activity {

    WifiManager wifiManager;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main_wap);
    }

    public void openWifi(View v) {
        createWifiAccessPoint();
    }

    private void createWifiAccessPoint() {
        if (wifiManager.isWifiEnabled()) {
            wifiManager.setWifiEnabled(false);
        }
        Method[] wmMethods = wifiManager.getClass().getDeclaredMethods();
        boolean methodFound = false;
        for (Method method: wmMethods) {
            if (method.getName().equals("setWifiApEnabled")) {
                methodFound = true;
                WifiConfiguration netConfig = new WifiConfiguration();
                netConfig.SSID = "AccessPoint";
                netConfig.allowedAuthAlgorithms.set(
                    WifiConfiguration.AuthAlgorithm.OPEN);
                try {
                    boolean apstatus = (Boolean) method.invoke(
                        wifiManager, netConfig, true);
                    for (Method isWifiApEnabledmethod: wmMethods) {
                        if (isWifiApEnabledmethod.getName().equals(
                                "isWifiApEnabled")) {
                            while (!(Boolean) isWifiApEnabledmethod.invoke(
                                    wifiManager)) {};
                            for (Method method1: wmMethods) {
                                if (method1.getName().equals(
                                        "getWifiApState")) {
                                    int apstate;
                                    apstate = (Integer) method1.invoke(
                                        wifiManager);
                                }
                            }
                        }
                    }
                    if (apstatus) {
                        Log.d("Splash Activity",
                            "Access Point created");
                    } else {
                        Log.d("Splash Activity",
                            "Access Point creation failed");
                    }

                } catch (IllegalArgumentException e) {
                    e.printStackTrace();
                } catch (IllegalAccessException e) {
                    e.printStackTrace();
                } catch (InvocationTargetException e) {
                    e.printStackTrace();
                }
            }
        }
        if (!methodFound) {
            Log.d("Splash Activity",
                "cannot configure an access point");
        }
    }
}