constraintlayout
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Optimizer bug with ratio and _default = wrap
Example:
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="@+id/textView"
android:layout_width="0dp"
android:layout_height="0dp"
android:text="TextView"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintDimensionRatio="1:2"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintWidth_default="wrap" />
</androidx.constraintlayout.widget.ConstraintLayout>
The TextView is measured to obtain it's wrap_content measurements, but then the optimizer does not consider match_constraint, so the height is not calculated with the ratio and the width does not consider it's remaining space in constraints.