not permitted by network security policy error

使用okhttp的时候并且compileSdkVersion==28做网络请求会出现这个. 偶尔还会报NetworkSecurityConfig: No Network Security Config specified, using platform default fix: 在AndroidManifest.xml加入以下代码:

<application
  android:networkSecurityConfig="@xml/network_security_config"
>
</application>

network_security_config:

<?xml version="1.0" encoding="utf-8"?>
<network-security-config>
    <base-config cleartextTrafficPermitted="true" />
</network-security-config>

和iOS的NSAppTransportSecurity一样..