Android material theme text input - changing colours of underline and floating label

Android styling/theming is an unholy mess, and I battled once again today with trying to get an input field to look like this:

This is how it's done - the important thing to note is that these style items go on your main app theme. Applying them directly to a specific input-field-only style/theme will not work.

Android configuration qualifiers for alternative resources

I discovered today that there's loads more configuration qualifiers for providing alternative Android resources than I was aware of. Here's a handy table, taken from here.

Configuration	Example Qualifier Values
MCC and MNC	Examples:mcc310 mcc310-mnc004 mcc208-mnc00 etc.
Language and region	Examples:en fr en-rUS fr-rFR fr-rCA etc.
Layout Direction	ldrtl ldltr
smallestWidth	swdp Examples:sw320dp sw600dp sw720dp etc.
Available width	wdp Examples:w720dp w1024dp etc.
Available height	hdp Examples:h720dp h1024dp etc.
Screen size	small normal large xlarge
Screen aspect	long notlong
Round screen	round notround
Screen orientation	port land
UI mode	car desk television appliancewatch
Night mode	night notnight
Screen pixel density (dpi)	ldpi mdpi hdpi xhdpi xxhdpi xxxhdpi nodpi tvdpi anydpi
Touchscreen type	notouch finger
Keyboard availability	keysexposed keyshidden keyssoft
Primary text input method	nokeys qwerty 12key
Navigation key availability	navexposed navhidden
Primary non-touch navigation method	nonav dpad trackball wheel
Platform Version (API level)	Examples:v3 v4 v7 etc.