Android Facebook SDK Custom Login

I have to create login in android application thorough facebook I make it through Facebook tutorial which is working perfectly with custom UI. ( i have customised Fb LoginButton in Xml)

Now i want to put login button in first activity and logout button in another activity which will be open after successfully logged in and custom dialog for logIn and logOut Process(i.e. Fb Login in Zomato)

I go through the fb docs but there is no relevant material for that Need some suggestion or help.