Is having a toggle on title bar okay for android app?

1. How do I hide the title bar on my Android?
2. What is title bar in Android?

How do I hide the title bar on my Android?

So basically we just need to change DarkActionBar to NoActionBar. NoActionBar theme prevents the app from using the native ActionBar class to provide the app bar. Thus it removes the title of every activity.

What is title bar in Android?

The Title bar is a small part of the UI that you can supply with some text and a color. You see it on a lot of Android 2.0 Apps. See here. The Actionbar is the bar with buttons that has back navigation etc. If you can chose, you use it instead of the Titlebar.