android webview展示网页空白

1、res->xml目录下增加network_security_config.xml

<?xml version="1.0" encoding="utf-8"?>
<network-security-config>
    <base-config cleartextTrafficPermitted="true" />
    <debug-overrides>
        <trust-anchors>
            <!-- Trust user added CAs while debuggable only -->
            <certificates src="user" />
        </trust-anchors>
    </debug-overrides>
</network-security-config>
2、AndroidManifest.xml的application标签下加上

android:networkSecurityConfig="@xml/network_security_config"
android:usesCleartextTraffic="false"