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.

Making them adjustable was tried through code:

dialogWeight.touchables.filterIsInstance<Button>().forEach {
TextViewCompat.setAutoSizeTextTypeWithDefaults(it, 
TextViewCompat.AUTO_SIZE_TEXT_TYPE_UNIFORM) }

And xml:

<android.support.v7.widget.AppCompatTextView
android:layout_height="match_parent"
android:text="7"
android:autoSizeTextType="uniform"/>

Any ideas ? I'm starting to believe that it's currently bugged

Answer 1

Okay, so the combination of settings that worked :

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto">

<android.support.v7.widget.AppCompatTextView
android:text="7"
app:autoSizeTextType="uniform"/>

You also need the appcompat-v7 library as a dependency in your module build.gradle file.

dependencies {
    implementation 'com.android.support:appcompat-v7:27.1.1'
}