<?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" tools:context=".TestPlayActivity"> <Button android:id="@+id/button_play" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Play" app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toTopOf="parent" /> <TextView android:id="@+id/textView_title" android:layout_width="66dp" android:layout_height="16dp" android:text="TextView" app:layout_constraintBottom_toTopOf="@+id/button_play" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintHorizontal_bias="0.498" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toTopOf="parent" app:layout_constraintVertical_bias="0.539" /> <TextView android:id="@+id/textView_position" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="TextView" app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toBottomOf="@+id/button_play" /> </androidx.constraintlayout.widget.ConstraintLayout>