Broadcast action for WIFI change

Question

In my application I have to get notified whenever the device connects or disconnects from a WIFI network. For this I have to use a BroadcastReceiver but after reading through different articles and questions here on SO I'm a bit confused which Broadcast action I should use for this. In my opinion I have three choices:

• SUPPLICANT_CONNECTION_CHANGE_ACTION
• NETWORK_STATE_CHANGED_ACTION
• CONNECTIVITY_ACTION

To reduce resources I really only want to get notified whenever the device is CONNECTED to a WIFI network (and it has received an IP address) or when the device has DISCONNECTED from one. I do not care about the other states like CONNECTING etc.

So what do you think is the best Broadcast action I should use for this? And do I have to manully filter the events (because I receieve more then CONNECTED and DISCONNECTED) in onReceive?

EDIT: As I pointed out in a comment below I think SUPPLICANT_CONNECTION_CHANGE_ACTION would be the best choice for me but it is never fired or received by my application. Others have the same problem with this broadcast but a real solution for this is never proposed (in fact other broadcasts are used). Any ideas for this?

Answer 1

You can go for WifiManager.NETWORK_STATE_CHANGED_ACTION works.

Register receiver with WifiManager.NETWORK_STATE_CHANGED_ACTION Action, either in Manifest or Fragment or Activity, which ever suited for you.

Override receiver :

@Override
public void onReceive(Context context, Intent intent) {

    final String action = intent.getAction();

    if(action.equals(WifiManager.NETWORK_STATE_CHANGED_ACTION)){
        NetworkInfo info = intent.getParcelableExtra(WifiManager.EXTRA_NETWORK_INFO);
        boolean connected = info.isConnected();
        if (connected)
        //call your method
    }      
}

Answer 2

Please try

@Override
protected void onResume() {
    super.onResume();
    IntentFilter filter = new IntentFilter();
    filter.addAction(ConnectivityManager.CONNECTIVITY_ACTION);
    filter.addAction("android.net.wifi.STATE_CHANGE");
    registerReceiver(networkChangeReceiver, filter);
}

@Override
protected void onDestroy() {
    unregisterReceiver(networkChangeReceiver);
    super.onDestroy();
}

and

BroadcastReceiver networkChangeReceiver = new BroadcastReceiver() {
    @Override
    public void onReceive(Context context, Intent intent) {

        if (!AppUtils.hasNetworkConnection(context)) {
            showSnackBarToast(getNetworkErrorMessage());
        }

    }
};

I am using this and it is working for me. Hope it will help you out.