ConnectivityManager.NetworkCallback() -> onAvailable(Network network) method is not triggered when device connects to a internal wifi network

Question

I am trying to send telementary data to App Center on out internal wifi network but it is not sending on this network but it does on any external network. When debugging found that Method onAvailable() is not called when device is connected to internal wifi but it does get called when connected to any external wifi.

Below code is from App Center SDK :
appcenter\utils\NetworkStateHelper.javaNetworkStateHelper.java. Class NetworkStateHelper -> Method reopen() --> public void onAvailable(Network network) method

Sample Code:

private ConnectivityManager.NetworkCallback mNetworkCallback = new ConnectivityManager.NetworkCallback() 
{

    @Override
    public void onAvailable(Network network) {
        onNetworkAvailable(network);
    }

    @Override
    public void onLost(Network network) {
        onNetworkLost(network);
    }
};

It should call the onAvailable method when connected to an internal wifi network.

Hi, what is your target api in gradle file? – Maksim Novikov Feb 05 '19 at 07:14 — Maksim Novikov, Feb 05 '19 at 07:14
It is 26, compileSdkVersion 26 buildToolsVersion "26.0.2" – sonu769 Feb 05 '19 at 23:35 — sonu769, Feb 05 '19 at 23:35
I have a similar issue for some Android 6 devices. – algrid Dec 23 '19 at 19:30 — algrid, Dec 23 '19 at 19:30

score 1 · Answer 1 · answered Feb 05 '19 at 07:21

1

As written in the android docs :

Apps targeting Android 7.0 (API level 24) and higher do not receive CONNECTIVITY_ACTION broadcasts if they declare the broadcast receiver in their manifest. Apps will still receive CONNECTIVITY_ACTION broadcasts if they register their BroadcastReceiver with Context.registerReceiver() and that context is still valid.

This means if your target api is higher than 24 you need to register broadcast receiver when your activity starts.

in you Activity onCreate()

IntentFilter intentFilter = new IntentFilter(ConnectivityManager.CONNECTIVITY_ACTION);
registerReceiver(connectivityReceiver, intentFilter);

declare the broadcast:

private BroadcastReceiver connectivityReceiver = new BroadcastReceiver() {
    @Override
    public void onReceive(Context context, Intent intent) {
      //check state here....
    }
  };

answered Feb 05 '19 at 07:21

Maksim Novikov

683
5
17

8

Connectivity-action is deprecated since API level 28 https://developer.android.com/reference/android/net/ConnectivityManager.html#CONNECTIVITY_ACTION. The network callback is the right API to use now, the one mentioned in the question. – Guillaume Perrot Feb 05 '19 at 19:17
Thanks for your help. Am using android 6.0.1 and target sdk is 26. – sonu769 Feb 05 '19 at 23:37
The sample code I have shown is from App Center SDK which is readonly. https://docs.microsoft.com/en-us/appcenter/sdk/analytics/android – sonu769 Feb 06 '19 at 01:56
@sonu769 do you use Xamarin? – Maksim Novikov Feb 06 '19 at 09:14
No just android – sonu769 Feb 07 '19 at 17:30

score 1 · Answer 2 · answered Mar 10 '21 at 21:12

You have to restrict the network type to Wifi.

1. Build the NetworkRequest:

val networkRequest = getNetworkRequest()

private fun getNetworkRequest(): NetworkRequest {
    return NetworkRequest.Builder()
        .addTransportType(NetworkCapabilities.TRANSPORT_WIFI)    //here!!
        .build()
}

2. Build the NetworkCallback:

val networkCallback = getNetworkCallBack()

private fun getNetworkCallBack(): ConnectivityManager.NetworkCallback {
    return object : ConnectivityManager.NetworkCallback() {
        override fun onAvailable(network: Network) {    //when Wifi is on
            super.onAvailable(network)

            Toast.makeText(requireContext(), "Wifi is on!", Toast.LENGTH_SHORT).show()
        }

        override fun onLost(network: Network) {    //when Wifi 【turns off】
            super.onLost(network)

            Toast.makeText(requireContext(), "Wifi turns off!", Toast.LENGTH_SHORT).show()
        }
    }
}

3. Register and Unregister:

fun getConnectivityManager() = requireContext().getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager

override fun onResume() {    //start monitoring when in the foreground
    super.onResume()

    getConnectivityManager().registerNetworkCallback(networkRequest, networkCallback)
}

override fun onPause() {    //stop monitoring when not fully visible
    super.onPause()

    getConnectivityManager().unregisterNetworkCallback(networkCallback)
}

4. Don't forget the permission:

<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

Demo: https://youtu.be/RPRcGbuB6eI

ConnectivityManager.NetworkCallback() -> onAvailable(Network network) method is not triggered when device connects to a internal wifi network

2 Answers2

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