在Android上使用蓝牙消息

I am an amateur developer and i am developing an app in which my android phone communicates with my microcontroller via bluetooth. For this purose i am using the the google sample bluetooth chat app as a module(without any edit) in my project and my app moves to this module from my basic or default module using intent. Now the problem is when my app moves to an activity in this module the top toolbar doesnt apper. The same code when executed independently shows the toolbar (Actionbar). I am not able to understand the problem.Please help me. Thanks in advance!I am an amateur developer and i am developing a