CosmosClient / app / src / main / res / xml / network_security_config.xml

<?xml version="1.0" encoding="utf-8"?>
<network-security-config>
    <domain-config cleartextTrafficPermitted="true">
        <domain includeSubdomains="true">nitta-lab-www.is.konan-u.ac.jp</domain>
    </domain-config>
</network-security-config>