Android: Custom action bar,How to use entire width?

Question

Here is an image of my custom action bar:

I want to use the entire wid

Answer 1

I just wanted to tell everybody that IN SOME WAY having this code below does not work. A space between the edge of the screen and the Toolbar remains in my case.

app:contentInsetEnd="0dp"
app:contentInsetStart="0dp"

I spent ~2hours doing some manipulations with styles and this two attributes. Nothing helped me. All of a sudden I thought whether this "space" may be just a padding or margin of the Toolbar. But my Toolbar hadn't had any padding or margin. And I added 0dp padding to the Toolbar in my layout .xml file.

android:padding="0dp"

It worked. You can imagine my face. This space has gone away. Android lied to me.