无法使用片段显示活动工具栏

Hello i'm having trouble displaying my toolbar using fragment. I am integrating my app with facebook. I am able to connect to facebook and get basic user profile details such as first name, last name and user profile pic. Now i passed the information from my main activity to my second activity. My second activity will be using fragments. Now i made a fragment that holds toolbar, the user name and pic. But i am having trouble displaying the fragment. Will someone tell me what i'm doing wrong. Thank you. below are my files.Hello i'm having trouble displaying my toolbar