android - 滚动视图只有一个直接子错误
问题描述
这是我的 xml 文件。我想在其中添加滚动视图，但是当我这样做时，它会显示错误滚动视图只有一个直接子级。我尝试了一切，但没有找到任何运气。如果我制作主标签滚动视图而不是线性布局，我可以工作，但它也可以滚动我的标题和底部导航。知道如何在这种情况下进行滚动。
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
tools:context=".Dashboard"
android:orientation="vertical">
<include layout="@layout/header"/>
<ScrollView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:scrollbars="vertical">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:layout_margin="16dp">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:orientation="vertical">
<ImageView
android:layout_width="30dp"
android:layout_height="35dp"
android:layout_marginLeft="5dp"
android:layout_gravity="left"
android:id="@+id/iv_cnic"
android:src="@drawable/icard1"
/>
</LinearLayout>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:orientation="vertical">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="14sp"
android:textStyle="normal"
android:id="@+id/tv_cnic"
android:layout_marginTop="5dp"
android:textColor="#800000"/>
</LinearLayout>
</LinearLayout>
<LinearLayout
android:layout_width = "match_parent"
android:layout_height = "wrap_content"
android:layout_marginTop = "0dp"
android:gravity="center"
android:weightSum = "3"
android:orientation = "horizontal" >
<androidx.cardview.widget.CardView
android:layout_weight = "1"
android:layout_width = "match_parent"
android:layout_height = "100dp"
android:layout_margin = "5dp"
android:clickable = "true"
app:cardBackgroundColor="@color/grey_10"
app:cardCornerRadius = "15dp"
app:cardElevation = "3dp">
<RelativeLayout
android:layout_width = "match_parent"
android:layout_height = "wrap_content"
android:padding = "3dp" >
<ImageView
android:layout_width = "40dp"
android:layout_height = "40dp"
android:src = "@drawable/car1"
android:layout_marginTop="5dp"
android:layout_centerHorizontal="true"
/>
<TextView
android:layout_width = "wrap_content"
android:layout_height = "wrap_content"
android:id="@+id/name"
android:textSize="12sp"
android:layout_centerHorizontal="true"
android:layout_marginTop="60dp"
android:textColor = "@color/black"
android:textStyle = "normal" />
</RelativeLayout >
</androidx.cardview.widget.CardView>
<androidx.cardview.widget.CardView
android:layout_weight = "1"
android:layout_width = "match_parent"
android:layout_height = "100dp"
android:layout_margin = "5dp"
android:id="@+id/tv_register"
android:clickable = "true"
app:cardBackgroundColor="@color/grey_10"
app:cardCornerRadius = "15dp"
app:cardElevation = "3dp">
<RelativeLayout
android:layout_width = "match_parent"
android:layout_height = "wrap_content"
android:padding = "3dp" >
<ImageView
android:layout_width = "40dp"
android:layout_height = "40dp"
android:src = "@drawable/mtag"
android:layout_marginTop="5dp"
android:layout_centerHorizontal="true"
/>
<TextView
android:layout_width = "wrap_content"
android:layout_height = "wrap_content"
android:text="Request M-Tag"
android:textSize="12sp"
android:layout_centerHorizontal="true"
android:layout_marginTop="60dp"
android:textColor = "@color/black"
android:textStyle = "normal" />
</RelativeLayout >
</androidx.cardview.widget.CardView>
<androidx.cardview.widget.CardView
android:layout_weight = "1"
android:layout_width = "match_parent"
android:layout_height = "100dp"
android:layout_margin = "5dp"
android:id="@+id/s_recharge"
android:clickable = "true"
app:cardBackgroundColor="@color/grey_10"
app:cardCornerRadius = "15dp"
app:cardElevation = "3dp">
<RelativeLayout
android:layout_width = "match_parent"
android:layout_height = "wrap_content"
android:padding = "3dp" >
<ImageView
android:layout_width = "40dp"
android:layout_height = "40dp"
android:src = "@drawable/lottery"
android:layout_marginTop="5dp"
android:layout_centerHorizontal="true"
/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_marginTop="60dp"
android:text="Recharge"
android:textColor="@color/black"
android:textSize="12sp"
android:textStyle="normal" />
</RelativeLayout >
</androidx.cardview.widget.CardView>
</LinearLayout>
<LinearLayout
android:layout_width = "match_parent"
android:layout_height = "wrap_content"
android:layout_marginTop = "0dp"
android:gravity="center"
android:weightSum = "3"
android:orientation = "horizontal" >
<androidx.cardview.widget.CardView
android:layout_weight = "1"
android:layout_width = "match_parent"
android:layout_height = "100dp"
android:layout_margin = "5dp"
android:id="@+id/c_compass"
android:clickable = "true"
app:cardBackgroundColor="@color/grey_10"
app:cardCornerRadius = "15dp"
app:cardElevation = "3dp">
<RelativeLayout
android:layout_width = "match_parent"
android:layout_height = "wrap_content"
android:padding = "3dp" >
<ImageView
android:layout_width = "40dp"
android:layout_height = "40dp"
android:src = "@drawable/compass"
android:layout_marginTop="5dp"
android:layout_centerHorizontal="true"
/>
<TextView
android:layout_width = "wrap_content"
android:layout_height = "wrap_content"
android:text="Qibla \u0026 Safar Dua"
android:textSize="12sp"
android:layout_centerHorizontal="true"
android:layout_marginTop="60dp"
android:textColor = "@color/black"
android:textStyle = "normal" />
</RelativeLayout >
</androidx.cardview.widget.CardView>
<androidx.cardview.widget.CardView
android:layout_weight = "1"
android:layout_width = "match_parent"
android:layout_height = "100dp"
android:layout_margin = "5dp"
android:clickable = "true"
app:cardBackgroundColor="@color/grey_10"
app:cardCornerRadius = "15dp"
app:cardElevation = "3dp">
<RelativeLayout
android:layout_width = "match_parent"
android:layout_height = "wrap_content"
android:padding = "3dp" >
<ImageView
android:layout_width = "40dp"
android:layout_height = "40dp"
android:src = "@drawable/travel"
android:layout_marginTop="5dp"
android:layout_centerHorizontal="true"
/>
<TextView
android:layout_width = "wrap_content"
android:layout_height = "wrap_content"
android:text="Travel Advisory"
android:textSize="12sp"
android:layout_centerHorizontal="true"
android:layout_marginTop="60dp"
android:textColor = "@color/black"
android:textStyle = "normal" />
</RelativeLayout >
</androidx.cardview.widget.CardView>
<androidx.cardview.widget.CardView
android:layout_weight = "1"
android:layout_width = "match_parent"
android:layout_height = "100dp"
android:layout_margin = "5dp"
android:clickable = "true"
app:cardBackgroundColor="@color/grey_10"
app:cardCornerRadius = "15dp"
app:cardElevation = "3dp">
<RelativeLayout
android:layout_width = "match_parent"
android:layout_height = "wrap_content"
android:padding = "3dp" >
<ImageView
android:layout_width = "40dp"
android:layout_height = "40dp"
android:src = "@drawable/tollroad"
android:layout_marginTop="5dp"
android:layout_centerHorizontal="true"
/>
<TextView
android:layout_width = "wrap_content"
android:layout_height = "wrap_content"
android:text="Toll Plazas Info"
android:textSize="12sp"
android:layout_centerHorizontal="true"
android:layout_marginTop="60dp"
android:textColor = "@color/black"
android:textStyle = "normal" />
</RelativeLayout >
</androidx.cardview.widget.CardView>
</LinearLayout>
<LinearLayout
android:layout_width = "match_parent"
android:layout_height = "wrap_content"
android:layout_marginTop = "0dp"
android:gravity="center"
android:weightSum = "3"
android:orientation = "horizontal" >
<androidx.cardview.widget.CardView
android:layout_weight = "1"
android:layout_width = "match_parent"
android:layout_height = "100dp"
android:layout_margin = "5dp"
android:clickable = "true"
app:cardBackgroundColor="@color/grey_10"
app:cardCornerRadius = "15dp"
app:cardElevation = "3dp">
<RelativeLayout
android:layout_width = "match_parent"
android:layout_height = "wrap_content"
android:padding = "3dp" >
<ImageView
android:layout_width = "40dp"
android:layout_height = "40dp"
android:src = "@drawable/destination"
android:layout_marginTop="5dp"
android:layout_centerHorizontal="true"
/>
<TextView
android:layout_width = "wrap_content"
android:layout_height = "wrap_content"
android:text="Journey Planner"
android:textSize="12sp"
android:layout_centerHorizontal="true"
android:layout_marginTop="60dp"
android:textColor = "@color/black"
android:textStyle = "normal" />
</RelativeLayout >
</androidx.cardview.widget.CardView>
<androidx.cardview.widget.CardView
android:layout_weight = "1"
android:layout_width = "match_parent"
android:layout_height = "100dp"
android:layout_margin = "5dp"
android:clickable = "true"
app:cardBackgroundColor="@color/grey_10"
app:cardCornerRadius = "15dp"
app:cardElevation = "3dp">
<RelativeLayout
android:layout_width = "match_parent"
android:layout_height = "wrap_content"
android:padding = "3dp" >
<ImageView
android:layout_width = "40dp"
android:layout_height = "40dp"
android:src = "@drawable/highway"
android:layout_marginTop="5dp"
android:layout_centerHorizontal="true"
/>
<TextView
android:layout_width = "wrap_content"
android:layout_height = "wrap_content"
android:text="Motorway Information"
android:textSize="12sp"
android:layout_centerHorizontal="true"
android:layout_marginTop="60dp"
android:textColor = "@color/black"
android:textStyle = "normal" />
</RelativeLayout >
</androidx.cardview.widget.CardView>
<androidx.cardview.widget.CardView
android:layout_weight = "1"
android:layout_width = "match_parent"
android:layout_height = "100dp"
android:layout_margin = "5dp"
android:clickable = "true"
app:cardBackgroundColor="@color/grey_10"
app:cardCornerRadius = "15dp"
app:cardElevation = "3dp">
<RelativeLayout
android:layout_width = "match_parent"
android:layout_height = "wrap_content"
android:padding = "3dp" >
<ImageView
android:layout_width = "40dp"
android:layout_height = "40dp"
android:src = "@drawable/tollroad"
android:layout_marginTop="5dp"
android:layout_centerHorizontal="true"
/>
<TextView
android:layout_width = "wrap_content"
android:layout_height = "wrap_content"
android:text="Toll Rate Info"
android:textSize="12sp"
android:layout_centerHorizontal="true"
android:layout_marginTop="60dp"
android:textColor = "@color/black"
android:textStyle = "normal" />
</RelativeLayout >
</androidx.cardview.widget.CardView>
</LinearLayout>
<LinearLayout
android:layout_width = "match_parent"
android:layout_height = "wrap_content"
android:layout_marginTop = "10dp"
android:layout_marginLeft = "16dp"
android:layout_marginRight = "16dp"
android:weightSum = "2"
android:orientation = "horizontal" >
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:layout_marginTop="0dp">
<androidx.cardview.widget.CardView
android:layout_width = "match_parent"
android:layout_height = "wrap_content"
android:layout_margin = "16dp"
android:clickable = "true"
app:cardElevation = "13dp"
app:cardCornerRadius = "15dp"
android:focusable = "true"
app:cardBackgroundColor = "#800000" >
<LinearLayout
android:padding = "10dp"
android:gravity = "center"
android:layout_width = "match_parent"
android:layout_height = "100dp"
android:id="@+id/profile"
android:orientation = "horizontal" >
<LinearLayout
android:layout_width = "wrap_content"
android:layout_height = "wrap_content"
android:orientation = "vertical" >
<TextView
android:layout_width = "wrap_content"
android:layout_height = "wrap_content"
android:text = "M-Tag Vehicle Details"
android:textColor = "#fff"
android:textSize = "20dp" />
<TextView
android:layout_width = "wrap_content"
android:layout_height = "wrap_content"
android:text = "Click here to see details and records "
android:textColor = "#fff"
android:textSize = "10dp" />
</LinearLayout >
<RelativeLayout
android:layout_width = "match_parent"
android:layout_height = "match_parent" >
<ImageView
android:layout_width = "50dp"
android:layout_height = "50dp"
android:src = "@drawable/car1"
android:layout_centerVertical = "true"
android:layout_alignParentRight = "true" />
</RelativeLayout >
</LinearLayout >
</androidx.cardview.widget.CardView>
</LinearLayout>
</ScrollView>
<include
layout="@layout/bottom_navigation"/>
</LinearLayout >解决方案
如官方文档中所述，
滚动视图中可能只有一个直接子视图。要在滚动视图中添加多个视图，请让您添加视图组的直接子级，例如 LinearLayout，并在该 LinearLayout 中放置其他视图。
尝试以下
<androidx.constraintlayout.widget.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent">
<include
android:id="@+id/header_include"
layout="@layout/header"
android:layout_width="match_parent"
android:layout_height="50dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<include
android:id="@+id/navigation_include"
layout="@layout/bottom_navigation"
android:layout_width="match_parent"
android:layout_height="50dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent" />
<LinearLayout
android:id="@+id/linearLayout"
android:layout_width="match_parent"
android:layout_height="0dp"
android:orientation="vertical"
app:layout_constraintBottom_toTopOf="@+id/navigation_include"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@id/header_include">
<ScrollView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:fillViewport="true"
android:scrollbars="vertical">
<!-- add this layout as a view group for the rest of your linear layout -->
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<!--rest of your linear layout-->
</LinearLayout>
</ScrollView>
</LinearLayout>
</androidx.constraintlayout.widget.ConstraintLayout>
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