Use packet capture tool (1) -fiddler

1. Select Tools-options-HTTPS
   
   is set according to the settings on top of the picture, after completing the first step, the PC should be able to catch traffic package
2. Setting Connections
   
3. Certificate installation end of the phone
   to view the ip address of your PC, access on your phone, download the certificate

PCip:8888

4. Modify network settings on the mobile phone
   network to manually modify the proxy host name to an IP address of the computer port is set to 8888