TextView autoSizeTextType not working in Compat

Question

I tried using autoSizeTextType. My minSdk is 24, all the tools are 26 and compat ist 26-beta2 as well.

Answer 1

I solved it programmatically.

TextView number1 = findViewById(R.id.number_one);
TextViewCompat.setAutoSizeTextTypeWithDefaults(number1, TextViewCompat.AUTO_SIZE_TEXT_TYPE_UNIFORM);

and the XML: