collins
Hey collins, apologies for late reply. Where you able to figure it out?
Make sure to download and install Android Studio first.
https://developer.android.com/studio/install.html
Here is where you select the titlebar and click on 'delete' - keep in mind this will remove the Share functionality.
Next, Run the App, you will get an error. There will be a screen that pops up (sorry dunno how to get there otherwise) that will show you code.
You will need to remove these lines:
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
Then run again.
Before:
After: