使底部工作表在顶部 android studio 有阴影

Question

I am having a bottom sheet and i would like the top to have a shadow because the back fragment is white and the bottom sheet is also white and is confusing

Below is the code of the bottom sheet

<androidx.core.widget.NestedScrollView xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:id="@+id/bottom_sheet"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    app:behavior_hideable="true"
    app:layout_behavior="com.google.android.material.bottomsheet.BottomSheetBehavior">

    <RelativeLayout
        android:id="@+id/bottomsheet"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">
        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="Bottom Sheet Text"
            android:textSize="30sp"/>
    </RelativeLayout>
</androidx.core.widget.NestedScrollView>

Answer 1

add

 android:elevation="15dp"
 android:outlineProvider="bounds"

to your bottomsheet viewgroup(RelativeLayout)