Properly control Android service state based on Wifi status

android_wifi_status

private void registerConnectivityChange() {
        BroadcastReceiver connectionReceiver = new BroadcastReceiver() {
            @Override
            public void onReceive(Context context, Intent intent) {
                                
                // When just using the ConnectivityManager you can get identical intents
                // twice within one second. So we need to use the WifiManager & ConnectivityManager
                // to determine true state
                if (intent.getAction().equals(WifiManager.NETWORK_STATE_CHANGED_ACTION)) {
                    NetworkInfo networkInfo = intent
                        .getParcelableExtra(WifiManager.EXTRA_NETWORK_INFO);
                    if (networkInfo.isConnected()) {
                        // Wifi is connected
                        setWifiUp();
                    }
                } else if (intent.getAction().equals(ConnectivityManager.CONNECTIVITY_ACTION)) {
                    NetworkInfo networkInfo = intent
                        .getParcelableExtra(ConnectivityManager.EXTRA_NETWORK_INFO);
                    if (networkInfo.getDetailedState() == DetailedState.DISCONNECTED) {
                        // Wifi is down
                        setWifiDown();
                    }
                }
                
            }
        };

        IntentFilter wifiEvents = new IntentFilter("android.net.conn.CONNECTIVITY_CHANGE");
        wifiEvents.addAction("android.net.wifi.STATE_CHANGE");
        registerReceiver(connectionReceiver, wifiEvents);
    }