<?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"
android:background="#000000"
tools:context=".MainActivity">
<RelativeLayout
android:id="@+id/relativeLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:visibility="visible"
android:orientation="vertical">
<ImageView
android:id="@+id/theme_music"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/media_bg1"
android:contentDescription="@string/music"
android:visibility="gone"
/>
<ImageView
android:id="@+id/theme_fm"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/media_bg2"
android:contentDescription="@string/fm"
android:visibility="gone"
/>
</RelativeLayout>
<ImageView
android:id="@+id/lyric_view"
android:layout_width="wrap_parent"
android:layout_height="wrap_parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
/>
</androidx.constraintlayout.widget.ConstraintLayout>
增加三個方向的限制佈局，一般採用上、左、右
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintEnd_toEndOf="parent"
