We can apply styles to the toolbar.
Go to styles.xml file and add a theme that we are gonna apply to toolbar.
Now link this theme with toolbar in both layout and layout-v21 folders.
Go to toolbar.xml and add theme attribute to the toolbar element. Make sure, you have added app schema (xmlns:app).
With this theme for our toolbar, if we run the app, toolbar title will show in while color. Let’s check it out:
Learn to code Android 