How to handle network error in Android studio ?

Call call = apiService.getData();
call.enqueue(new Callback() {
    @Override
    public void onResponse(Call call, Response response) {
        if (response.isSuccessful()) {
            \/\/ Handle success
        } else {
            \/\/ Handle error response
        }
    }

    @Override
    public void onFailure(Call call, Throwable t) {
        \/\/ Handle network error
    }
});