Android open another app and jump to specific Activity

Question

I know we can use Intent to open an App.But what I want to ask is like that: How can I directly jump to the specific Activity.I also know that we can use intent-filter.But if we don't know the scheme,host,Params Name,what can i do. For example,how to jump to the Facebook and open our company's home page. How to jump to the Line Group Directly. Thanks.