我正在尝试在布局中使用 BottomSheet。 Root View 是一个 Điều phối viênBố trí，我想在 Bottom Sheet 的顶部设置 Elevation，所以我将它设置为高值 (50dp)，但它没有显示当应用程序运行但它出现在 android studio 设计工具上时。

我尝试用纯色而不是渐变色为工作表设置背景，但它仍然有效。我也尝试使用阴影形状，但它没有提供相同的高度外观。

这是我的 XML

    xmlns:tools="http://schemas.android.com/tools"
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.atefhares.StartActivity"
    android:clipToPadding="false">

    
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">

        
            android:id="@+id/DetailsView"
            android:layout_width="match_parent"
            android:layout_height="100dp"
            android:orientation="vertical">

            
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="Details Should be shown here"
                android:id="@+id/textView"
                android:textSize="25sp"
                android:padding="20dp" />
        

        <đoạn xmlns:android="http://schemas.android.com/apk/res/android">
            xmlns:tools="http://schemas.android.com/tools"
            android:id="@+id/map"
            android:name="com.google.android.gms.maps.SupportMapFragment"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            tools:context="com.atefhares.Start_Activity" />


    
    <>
        android:id="@+id/bottom_sheet"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:behavior_peekHeight="70dp"
        app:layout_behavior="android.support.design.widget.BottomSheetBehavior"
        android:background="@drawable/gradiant"
        android:fillViewport="true"
        android:elevation="50dp">


        

    

编辑:bottom_sheet_layout.xml

    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fillViewport="true"
    android:orientation="vertical">


    
        android:orientation="ngang"
        android:layout_width="match_parent"
        android:layout_height="70dp"
        android:background="@color/colorPrimary"
        android:padding="10dp"
        android:id="@+id/inviteLL">

        
            android:layout_width="40dp"
            android:layout_height="40dp"
            android:id="@+id/imageView"
            android:background="@drawable/invite_icon"
            android:layout_margin="5dp"
            android:layout_gravity="center_vertical" />

        
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="Invite Friends"
            android:textSize="22sp"
            android:textColor="#ffffff"
            android:padding="10dp"
            android:fontFamily="sans-serif-condensed"
            android:trọng lực="center_vertical"
            android:id="@+id/inviteTV"

            android:layout_rabity="center_vertical"
            android:layout_weight="1" />

        
            android:layout_width="30dp"
            android:layout_height="30dp"
            android:id="@+id/arrowIV"
            android:layout_rabity="center_vertical"
            android:background="@drawable/arrow_up" />
    


    
        android:layout_width="match_parent"
        android:layout_height="fill_parent"
        android:id="@+id/usersLV"
        android:dividerHeight="1dp"
        android:divider="#ffffff"
        android:background="#ffffff" />

Vì thếlàm sao tôi có thể vào đượcTấm dưới cùng

Có ai có thể giúp được không?

câu trả lời hay nhất

hãy thử cái này,

<>
        android:id="@+id/bottom_sheet"
xmlns:slide_panel="http://schemas.android.com/apk/res-auto"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:behavior_peekHeight="70dp"
      app:layout_behavior="android.support.design.widget.BottomSheetBehavior"
        android:background="@drawable/gradiant"
        android:fillViewport="true"
        slide_panel:elevation="50dp">

Về android - độ cao không hoạt động với BottomSheet trong bố cục điều phối viên, chúng tôi đã tìm thấy một câu hỏi tương tự trên Stack Overflow: https://stackoverflow.com/questions/38670125/