Force WebView for a specific network

Question

Is it possible to get WebView load the URL through the specified Network ?

Two network connections open on my device: Wi-Fi and mobile data. The mobile data network is set as the default network for outgoing connections (therefore, the connection manager returns the mobile data network for connectivityManager.getActiveNetwork() ).

The webpage I am trying to download (from http://10.0.0.1:80 ) is running on a web server that is connected via Wi-Fi. Thus, web browsing does not load on the page because it is not accessible via mobile data.

Answer 1

So, I myself dug a little more in this thread and found useful information:

• If the connection should use this network, you need to manually bind sockets to this network or directly create sockets through the factory socket .

• In the standard WebView implementation, WebView not possible to install a factory socket or allow it to use these sockets.

• But it is possible to tie the entire application process to the network . This ensures that from now on all newly created sockets will be tied to this network. (The original default network setup method was deprecated at level 23, just take a look at the bindProcessToNetwork() method in my code below.)

• Several network connections are only possible for Android devices running API level 21 or higher .

• NetworkCallback can be used to listen to any newly connected networks that run a given NetworkRequest .

Thanks to this knowledge, I was finally able to find a working solution:

ConnectionFragment.java

 public class ConnectionFragment extends Fragment { private static final String TAG = ConnectionFragment.class.getSimpleName(); private final NetworkCallback networkCallback = new NetworkCallback(); private ConnectivityManager connectivityManager; @Override public void onCreate(@Nullable Bundle savedInstanceState) { Log.v(TAG, "onCreate"); super.onCreate(savedInstanceState); connectivityManager = (ConnectivityManager) getActivity().getApplicationContext().getSystemService(Context.CONNECTIVITY_SERVICE); } @Override public void onStart() { Log.v(TAG, "onStart"); super.onStart(); if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) { registerNetworkCallback(); } } @Override public void onStop() { Log.v(TAG, "onStop"); super.onStop(); if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) { unregisterNetworkCallback(); } } @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP) private void registerNetworkCallback() { Log.v(TAG, "registerNetworkCallback"); final NetworkRequest networkRequest = new NetworkRequest.Builder() .addTransportType(NetworkCapabilities.TRANSPORT_WIFI) .build(); connectivityManager.registerNetworkCallback(networkRequest, networkCallback); } @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP) private void unregisterNetworkCallback() { Log.v(TAG, "unregisterNetworkCallback"); connectivityManager.unregisterNetworkCallback(networkCallback); } @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP) private class NetworkCallback extends ConnectivityManager.NetworkCallback { @Override public void onAvailable(Network network) { Log.v(TAG, "onAvailable"); bindProcessToNetwork(network); } @Override public void onLost(Network network) { Log.v(TAG, "onLost"); bindProcessToNetwork(null); } private void bindProcessToNetwork(final Network network) { Log.v(TAG, "bindProcessToNetwork: " + network); if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) { connectivityManager.bindProcessToNetwork(network); } else { ConnectivityManager.setProcessDefaultNetwork(network); } } } } 

Hope this helps someone.

But keep in mind: for all other connections based on a different network, you need to configure the sockets manually.

Respectfully,
winklerrr