Android http 不能联网：Cleartext HTTP traffic to not permitted

ref：

https://blog.csdn.net/gengkui9897/article/details/82863966

https://stackoverflow.com/questions/45940861/android-8-cleartext-http-traffic-not-permitted

在AndroidManifest.xml配置文件的<application>标签中插入:   

android:usesCleartextTraffic="true"