Hello,
I have tested the two samples provided on a small smartphone (Dogbie (almost no name phone), Android 6.0, 240x400) and found that the navigation icon's size was too big.
Of course, I could decide to use a smaller sized image for the navigation icon but in general, couldn't it be possible that those icon resize by themselves when in place ?
Looks like a bug in Toolbar.NavigationIconBitmap property. @corwin42 you should change the constructor to the one that expects resources and pass: BA.applicationContext.getResources()
As a workaround, you need to use Toolbar.NavigationIconDrawable with a BitmapDrawable.
I will update the examples tomorrow.