How to check internet without Networkinfo(Java)

Question

Since NetworkInfo is deprecated I don't able to find any alternative solution.
I've tried ConnectivityManager.NetworkCallbacks but in this OnNetworkUnavailable is not working.

How to check for internet when a button is clicked?

Answer 1

Add this permission in manifest

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

Then use below method

public boolean isOnline() {

    boolean isConnected = false;
    ConnectivityManager connectivityMgr = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
    if (Build.VERSION.SDK_INT < Build.VERSION_CODES.P) {
        // Checking internet connectivity
        NetworkInfo activeNetwork = null;
        if (connectivityMgr != null) {
            activeNetwork = connectivityMgr.getActiveNetworkInfo(); // Deprecated in API 29
        }
        isConnected = activeNetwork != null;

    } else {
        Network[] allNetworks = connectivityMgr.getAllNetworks(); // added in API 21 (Lollipop)

        for (Network network : allNetworks) {
            NetworkCapabilities networkCapabilities = connectivityMgr.getNetworkCapabilities(network);
            if (networkCapabilities != null) {
                if (networkCapabilities.hasTransport(NetworkCapabilities.TRANSPORT_WIFI)
                        || networkCapabilities.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR)
                        || networkCapabilities.hasTransport(NetworkCapabilities.TRANSPORT_ETHERNET))
                    isConnected = true;
            }
        }
    }

    return isConnected;

}