How to use mobile data forcefully for any application when wifi is on in Android 6

Question

I want the android application to use only mobile data even if WIFI and mobile data both on in Android 6. How can I bind the android process to Mobile data only.
Please suggest. Examples will be good.

Answer 1

You can do this pretty easy if you're android version is M or above. First, you need the right manifest permissions: <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" /> <uses-permission android:name="android.permission.CHANGE_NETWORK_STATE" />

Here is an example method that should do what you need:

public static void forceConnectionToMobile2(Context context) {
    final ConnectivityManager connection_manager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
        NetworkRequest.Builder request = new NetworkRequest.Builder();

        Log.d(TAG,"request TRANSPORT_CELLULAR");
        request.addCapability(NetworkCapabilities.TRANSPORT_CELLULAR);

        connection_manager.requestNetwork(request.build(), new ConnectivityManager.NetworkCallback() {
            @Override
            public void onAvailable(Network network) {
                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
                    Log.d(TAG,"binding app to cellular network");
                    connection_manager.bindProcessToNetwork(network);
                }
            }
        });

    }
}

Answer 2

boolean mobileDataEnabled = false;

        try {
            Class cmClass = Class.forName(connection_manager.getClass().getName());
            Method method = cmClass.getDeclaredMethod("getMobileDataEnabled");
            method.setAccessible(true);
            mobileDataEnabled = (Boolean) method.invoke(connection_manager);
        } catch (Exception e) {
        }
First check if mobile data enable or disable then do 

 if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
            NetworkRequest.Builder request = new NetworkRequest.Builder();
            request.addTransportType(NetworkCapabilities.TRANSPORT_CELLULAR);
            request.addCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET);

            connection_manager.requestNetwork(request.build(), new ConnectivityManager.NetworkCallback() {
                @Override
                public void onAvailable(Network network) {
connection_manager.bindProcessToNetwork(network);
}
}

Answer 3

You can visit Android force app to use mobile data channel

    manager = (WifiManager)this.getSystemService(Context.WIFI_SERVICE);

if(manager.isWifiEnabled()) {
    manager.setWifiEnabled(false);
}
// and to be sure:
ConnectivityManager.setNetworkPreference(ConnectivityManager.TYPE_MOBILE);