SSL代理/Charles和Android有问题

I want to test Https calls from android device using Charles proxy tool. I need to see the raw request/response contents for debugging app. I've configured Charles by adding the host and port under "Proxy Settings" -> SSL Tab. When I run the app, all SSL calls seems to disappear quickly from the Charles. Does any one has any idea how to fix this issue. Charles documentation doesn't seem to have information for Android devices.I want to test Https calls from android device