我在滚动视图中有一堆按钮，然后在滚动视图下面是一个水平线性布局，其中包含一些用于控件的按钮，然后在下面是一个Ad Mob横幅广告。我似乎无法弄清楚为什么当我滚动到按钮列表的底部时，最后一行按钮的大约一半隐藏在控件和横幅广告的后面。谁能告诉我如何使其滚动以显示完整的底部按钮行，以免它们隐藏在控件和广告横幅的线性布局后面？
以下是屏幕截图：
<?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=".MainActivity">
<ScrollView
android:id="@+id/scrollView2"
android:layout_width="0dp"
android:layout_height="0dp"
android:fillViewport="true"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<Button
android:id="@+id/button"
android:layout_width="0dp"
android:layout_height="0dp"
android:text="Button 1"
app:layout_constraintDimensionRatio="H,1:1"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toLeftOf="@+id/button2"
app:layout_constraintTop_toTopOf="parent" />
<Button
android:id="@+id/button2"
android:layout_width="0dp"
android:layout_height="0dp"
android:text="Button 2"
app:layout_constraintDimensionRatio="H,1:1"
app:layout_constraintLeft_toRightOf="@+id/button"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<Button
android:id="@+id/button3"
android:layout_width="0dp"
android:layout_height="0dp"
android:text="Button 3"
app:layout_constraintDimensionRatio="H,1:1"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toLeftOf="@+id/button2"
app:layout_constraintTop_toBottomOf="@id/button" />
<Button
android:id="@+id/button4"
android:layout_width="0dp"
android:layout_height="0dp"
android:text="Button 4"
app:layout_constraintDimensionRatio="H,1:1"
app:layout_constraintLeft_toRightOf="@+id/button"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="@id/button2" />
<Button
android:id="@+id/button5"
android:layout_width="0dp"
android:layout_height="0dp"
android:text=" Button 5"
app:layout_constraintDimensionRatio="H,1:1"
app:layout_constraintHorizontal_bias="1.0"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toLeftOf="@+id/button2"
app:layout_constraintTop_toBottomOf="@+id/button3" />
<Button
android:id="@+id/button6"
android:layout_width="0dp"
android:layout_height="0dp"
android:text="Button 6"
app:layout_constraintDimensionRatio="H,1:1"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintLeft_toRightOf="@+id/button"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="@+id/button4" />
<Button
android:id="@+id/button7"
android:layout_width="0dp"
android:layout_height="0dp"
android:text=" Button 7"
app:layout_constraintDimensionRatio="H,1:1"
app:layout_constraintHorizontal_bias="1.0"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toLeftOf="@+id/button8"
app:layout_constraintTop_toBottomOf="@+id/button5" />
<Button
android:id="@+id/button8"
android:layout_width="0dp"
android:layout_height="0dp"
android:text="Button 8"
app:layout_constraintDimensionRatio="H,1:1"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintLeft_toRightOf="@+id/button"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="@+id/button6" />
<Button
android:id="@+id/button9"
android:layout_width="0dp"
android:layout_height="0dp"
android:text=" Button 9"
app:layout_constraintDimensionRatio="H,1:1"
app:layout_constraintHorizontal_bias="1.0"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toLeftOf="@+id/button10"
app:layout_constraintTop_toBottomOf="@+id/button7" />
<Button
android:id="@+id/button10"
android:layout_width="0dp"
android:layout_height="0dp"
android:text="Button 10"
app:layout_constraintDimensionRatio="H,1:1"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintLeft_toRightOf="@+id/button"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="@+id/button8" />
<Button
android:id="@+id/button11"
android:layout_width="0dp"
android:layout_height="0dp"
android:text=" Button 11"
app:layout_constraintDimensionRatio="H,1:1"
app:layout_constraintHorizontal_bias="1.0"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toLeftOf="@+id/button12"
app:layout_constraintTop_toBottomOf="@+id/button9" />
<Button
android:id="@+id/button12"
android:layout_width="0dp"
android:layout_height="0dp"
android:text="Button 12"
app:layout_constraintDimensionRatio="H,1:1"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintLeft_toRightOf="@+id/button"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="@+id/button10" />
<Button
android:id="@+id/button13"
android:layout_width="0dp"
android:layout_height="0dp"
android:text=" Button 13"
app:layout_constraintDimensionRatio="H,1:1"
app:layout_constraintHorizontal_bias="1.0"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toLeftOf="@+id/button14"
app:layout_constraintTop_toBottomOf="@+id/button11" />
<Button
android:id="@+id/button14"
android:layout_width="0dp"
android:layout_height="0dp"
android:text="Button 14"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintDimensionRatio="H,1:1"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintLeft_toRightOf="@+id/button"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="@+id/button12" />
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guideline"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_begin="87dp" />
</androidx.constraintlayout.widget.ConstraintLayout>
</ScrollView>
<LinearLayout
android:id="@+id/controlslayout"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="#000000"
app:layout_constraintBottom_toTopOf="@+id/adView"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent">
<Button
android:id="@+id/play"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Play/Pause" />
<Button
android:id="@+id/timer"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Timer" />
<Button
android:id="@+id/volume"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Volume" />
</LinearLayout>
<com.google.android.gms.ads.AdView
android:id="@+id/adView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
app:adSize="SMART_BANNER"
app:adUnitId="ca-app-pub-3940256099942544/6300978111"
app:layout_constraintBottom_toBottomOf="@+id/scrollView2"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"></com.google.android.gms.ads.AdView>
</androidx.constraintlayout.widget.ConstraintLayout>
当向下滚动时，底部的按钮应该完全可见，并且不要隐藏在其他视图的后面。
答案 0 :(得分：0)
app:layout_constraintBottom_toBottomOf="parent"中的 ScrollView必须为app:layout_constraintBottom_toTopOf="@+id/controlslayout"。目前，您的列表正在填满整个屏幕，并在屏幕上方绘制按钮。
此外，如果您要像这样嵌套ViewGroup，那么使用ConstraintLayout并没有多大意义。