linearlayout 未显示在 recyclerview 下方

Question

在我的布局中，我有产品列表的 recyclerview..我在线性布局中显示总价...但在滚动时线性布局不显示

我的代码场景：

1--> 当我在 recyclerview 上有一个项目时 -->linearlayout 显示正常

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

在第二个场景中需要帮助...提前致谢

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>

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

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

需要帮助

Answer 1

您还没有为LinearLayout添加weightSum和orientation值。

Source

Answer 2

您可以使用 NestedScrollView 而不是 ScrollView。并将 RecyclerView 和 LinearLayout 放在 NestedScrollView 中。并启用 android:nestedScrollingEnabled=true。应该适合你。

<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>

并且在您的 java class 中设置了回收视图 recyclerView.setNestedScrollingEnabled(true or false);

Answer 3

像这样使用 ConstraintLayout，这里是您需要的完整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>

Answer 4

以下解决方案对我有用：-

<?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>

linearlayout 未显示在 recyclerview 下方

linearlayout is not getting displayed below recyclerview

xml

android

scrollview

android-layout

android-recyclerview

更新代码：--