linearlayout没有显示在recyclerview下方

Question

在我的布局中，我有产品列表的回收视图。。下面我在linearlayout中显示总价。。。但在滚动时，linearlayout不显示

我的代码场景：

1->当我在recyclerview上有一个项目时-->linearlayout显示精细

2->当我在recyclerview上有更多项目时-->向下滚动时看不到线性布局(线性布局未显示(

在第二个场景中需要帮助。。。提前感谢

下面是代码xml:--

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/relative">
<androidx.appcompat.widget.Toolbar
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:collapseIcon="@drawable/ic_arrow_back_black_24dp"
android:id="@+id/toolbartable"
android:background="@color/colorPrimaryDark">
</androidx.appcompat.widget.Toolbar>
</RelativeLayout>
<ScrollView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@id/relative"
android:id="@+id/nest"
android:scrollbars="vertical">
<androidx.recyclerview.widget.RecyclerView
android:layout_width="match_parent"
android:layout_below="@id/relative"
android:layout_height="wrap_content"
android:id="@+id/recyleview"/>
</ScrollView>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="100dp"
android:id="@+id/linearlayoutorder"
android:layout_below="@id/nest"
android:orientation="horizontal"
android:weightSum="2"
android:background="@drawable/border"
android:backgroundTintMode="@color/colorPrimary">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="TOTAL"
android:layout_gravity="center"
android:layout_weight="1"></TextView>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:id="@+id/totalidcost"
android:layout_gravity="right|center"
android:textAlignment="textEnd"
tools:ignore="RtlCompat"></TextView>
</LinearLayout>
</RelativeLayout>

更新代码：--

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/relative">
<androidx.appcompat.widget.Toolbar
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:collapseIcon="@drawable/ic_arrow_back_black_24dp"
android:id="@+id/toolbartable"
android:background="@color/colorPrimaryDark">
</androidx.appcompat.widget.Toolbar>
</RelativeLayout>
<androidx.core.widget.NestedScrollView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/nest"
android:scrollbars="vertical"
android:layout_below="@id/relative">
<androidx.recyclerview.widget.RecyclerView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:nestedScrollingEnabled="false"
android:id="@+id/recyleview"/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="100dp"
android:id="@+id/linearlayoutorder"
android:orientation="horizontal"
android:weightSum="2"
android:background="@drawable/border"
android:backgroundTintMode="@color/colorPrimary">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="TOTAL"
android:layout_gravity="center"
android:layout_weight="1"></TextView>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:id="@+id/totalidcost"
android:layout_gravity="right|center"
android:textAlignment="textEnd"
tools:ignore="RtlCompat"></TextView>
</LinearLayout>
</androidx.core.widget.NestedScrollView>
</RelativeLayout>

获取--：Caused by: android.view.InflateException: Binary XML file line #34: ScrollView can host only one direct child时出错

`Caused by: java.lang.IllegalStateException: ScrollView can host only one direct child`

需要帮助

Answer 1

以下解决方案对我有效：-

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/relative">
<androidx.appcompat.widget.Toolbar
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:collapseIcon="@drawable/ic_arrow_back_black_24dp"
android:id="@+id/toolbartable"
android:background="@color/colorPrimaryDark">
</androidx.appcompat.widget.Toolbar>
</RelativeLayout>
<androidx.core.widget.NestedScrollView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/nest"
android:scrollbars="vertical"
android:layout_below="@id/relative">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<androidx.recyclerview.widget.RecyclerView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:nestedScrollingEnabled="false"
android:id="@+id/recyleview"/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="100dp"
android:id="@+id/linearlayoutorder"
android:layout_below="@id/recyleview"
android:orientation="horizontal"
android:weightSum="2"
android:background="@drawable/border"
android:backgroundTintMode="@color/colorPrimary">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="TOTAL"
android:layout_gravity="center"
android:layout_weight="1"></TextView>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:id="@+id/totalidcost"
android:layout_gravity="right|center"
android:textAlignment="textEnd"
tools:ignore="RtlCompat"></TextView>
</LinearLayout>
</RelativeLayout>
</androidx.core.widget.NestedScrollView>
</RelativeLayout>

Answer 2

您尚未添加weightSum和orientation值​​用于LinearLayout。

源

Answer 3

您可以使用NestedScrollView而不是ScrollView。还可以将RecyclerView和LinearLayout放在NestedScrollView中。并启用android:nestedScrollingEnabled=true。应该对你有用。

<NestedScrollView 
android:layout_width="match_parent"
android:layout_height="match_parent"
android:nestedScrollingEnabled=true>
<LinearLayout 
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/recyleview"
android:layout_width="match_parent"
android:layout_height="0dp"
app:layout_constraintBottom_toTopOf="@id/linearlayoutorder"
app:layout_constraintTop_toBottomOf="@id/relative" />
<LinearLayout
android:id="@+id/linearlayoutorder"
android:layout_width="match_parent"
android:layout_height="100dp"
android:background="#000000"
android:backgroundTintMode="@color/colorPrimary"
android:orientation="horizontal"
android:weightSum="2"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_weight="1"
android:text="TOTAL" />
<TextView
android:id="@+id/totalidcost"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="right|center"
android:layout_weight="1"
android:textAlignment="textEnd"
tools:ignore="RtlCompat" />
</LinearLayout>
</LinearLayout>

在你的java类中，你有你的recyclerview集recyclerView.setNestedScrollingEnabled(true or false);

Answer 4

像这样使用ConstraintLayout，下面是您需要的完整xml代码

<?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">
<RelativeLayout
android:id="@+id/relative"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent">
<androidx.appcompat.widget.Toolbar
android:id="@+id/toolbartable"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@color/colorPrimaryDark"
app:collapseIcon="@drawable/back" />
</RelativeLayout>
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/recyleview"
android:layout_width="match_parent"
android:layout_height="0dp"
app:layout_constraintBottom_toTopOf="@id/linearlayoutorder"
app:layout_constraintTop_toBottomOf="@id/relative" />
<LinearLayout
android:id="@+id/linearlayoutorder"
android:layout_width="match_parent"
android:layout_height="100dp"
android:background="#000000"
android:backgroundTintMode="@color/colorPrimary"
android:orientation="horizontal"
android:weightSum="2"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_weight="1"
android:text="TOTAL" />
<TextView
android:id="@+id/totalidcost"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="right|center"
android:layout_weight="1"
android:textAlignment="textEnd"
tools:ignore="RtlCompat" />
</LinearLayout>
</androidx.constraintlayout.widget.ConstraintLayout>