xiaomi phone permission exception（permission request success，create file fail(permission denied)）

[zwping]

apply for permission on xiaomi phone,the permission application is successful, but the file create fail,log reminder permission denied

open app settings, acceess and change files on internal storage is success

phone: mix3(miui:10.2 android:P) mix2(miui:10.2 android:O)

use: implementation 'com.github.tbruyelle:rxpermissions:0.10.2'