ToolbarBackgroundImage

Set Background Image in Toolbar/NavigationBar.

Just do the following:

Android:

1. Copy image in Layout > Drawable > yourImage .

2. Add this line in toolbar.xml:

    android:background="@drawable/yourImage"
   

If you want subtilte then copy NavbarRenderer.cs else no need to have in solution.

iOS

1. Copy image in Resource > yourImage .

2. Add this line in AppDelegate.cs:

   UINavigationBar.Appearance.BarTintColor = UIColor.FromPatternImage(UIImage.FromFile("yourImage.png"));
   

Result:

Cheers!! { rzee }