BottomNavigationView即使在视图的顶部也是可见的

Question

我的屏幕有3个主要部分

• 工具栏
• homeContaner（将容纳BottomNavigationView的片段）
• mainContainer（主机初始屏幕或占据整个屏幕的任何屏幕）

当用飞溅BottomNavigationView替换mainContainer时，也显示我尝试将背景色添加到mainContainer，发现BottomNavigationView在mainContainer的Top

上

也试图向mainContainer添加标高，但没有新结果

截屏

完整代码

<?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"
    tools:context=".feature.home_Activity.HomeActivity">

    <androidx.appcompat.widget.Toolbar
        android:id="@+id/toolbar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:layout_constraintTop_toTopOf="parent"
        android:background="?attr/colorPrimary"
        android:minHeight="?attr/actionBarSize"
        app:titleTextColor="@android:color/white"/>

    <FrameLayout
        android:id="@+id/homeContainer"
        android:layout_width="0dp"
        android:layout_height="0dp"
        app:layout_constraintBottom_toBottomOf="@id/dummy"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@id/toolbar" />

    <View
        android:id="@+id/dummy"
        android:layout_width="match_parent"
        android:layout_height="@dimen/_10sdp"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="@id/navigation" />

    <com.google.android.material.bottomnavigation.BottomNavigationView
        android:id="@+id/navigation"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:elevation="1dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:menu="@menu/navigation" />

    <FrameLayout
        android:id="@+id/mainContainer"
        android:layout_width="0dp"
        android:layout_height="0dp"
        app:elevation="10dp"
        android:background="#ffaaff"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />


</androidx.constraintlayout.widget.ConstraintLayout>

Answer 1

LinearLayout包装

BottomNavigationView解决了问题

<?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=".feature.home_Activity.HomeActivity">

    <androidx.appcompat.widget.Toolbar
        android:id="@+id/toolbar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="?attr/colorPrimary"
        android:minHeight="?attr/actionBarSize"
        app:layout_constraintTop_toTopOf="parent"
        app:titleTextColor="@android:color/white" />

    <FrameLayout
        android:id="@+id/homeContainer"
        android:layout_width="0dp"
        android:layout_height="0dp"
        app:layout_constraintBottom_toBottomOf="@id/dummy"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@id/toolbar" />

    <View
        android:id="@+id/dummy"
        android:layout_width="match_parent"
        android:layout_height="@dimen/_10sdp"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="@id/navigationContainer" />

    <androidx.appcompat.widget.LinearLayoutCompat
        android:id="@+id/navigationContainer"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:layout_constraintBottom_toBottomOf="parent">

        <com.google.android.material.bottomnavigation.BottomNavigationView
            android:id="@+id/navigation"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:background="@drawable/bn_bg"
            app:elevation="1dp"
            app:itemBackground="@drawable/bn_item__bg"
            app:itemIconTint="@color/secondaryTextColor"
            app:itemTextColor="@color/primaryTextColor"
            app:layout_constraintBottom_toBottomOf="parent"
            app:menu="@menu/navigation" />


    </androidx.appcompat.widget.LinearLayoutCompat>


    <FrameLayout
        android:id="@+id/mainContainer"
        android:layout_width="0dp"
        android:layout_height="0dp"
        app:elevation="10dp"

        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />


</androidx.constraintlayout.widget.ConstraintLayout>