如何在与父级底部对齐的 CardView 上添加阴影

Question

我有一个 CardView 底部与屏幕对齐，尽管我想在 CardView 顶部添加更多阴影。我试过了

  android:shadowColor="#000"
  android:shadowDx="0"
  android:shadowDy="30"
  android:shadowRadius="50"

但看不到任何变化这是我的代码：

     <RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:app="http://schemas.android.com/apk/res-auto"
        android:clipToPadding="false"
        android:clipChildren="false"
         android:orientation="vertical"
         android:layout_width="match_parent"
         android:layout_height="match_parent">

    <!--rest of the code-->

     <LinearLayout
            android:layout_width="match_parent"
            android:layout_alignParentBottom="true"
            android:shadowColor="#000"
            android:shadowDx="0"
            android:shadowDy="30"
            android:shadowRadius="50"
            android:layout_height="wrap_content">
        <android.support.v7.widget.CardView
xmlns:app="http://schemas.android.com/apk/res-auto"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:elevation="8dp"
             android:divider="@android:color/transparent"
             android:dividerHeight="0.0px"
             android:clipToPadding="false"
             android:clipChildren="false"
             app:cardElevation="10dp"
             app:cardPreventCornerOverlap="false">

          <!--rest of the code-->
    </android.support.v7.widget.CardView>
    </LinearLayout>

    </RelativeLayout>

原文由 Stefanija 发布，翻译遵循 CC BY-SA 4.0 许可协议

Answer 1

好吧，边距并没有多大帮助，所以我在主容器上放置了填充并删除了所有这些阴影属性，因为 android:elevation="" 正在做这项工作。

这是一些清晰的代码，可满足此需求：

 <RelativeLayout
   xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:card_view="http://schemas.android.com/apk/res-auto"
        android:clipToPadding="false"
        android:clipChildren="false"
        android:orientation="vertical"
        android:padding="20dp"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

  <!--rest of the code-->

  <LinearLayout
         android:layout_width="match_parent"
         android:layout_alignParentBottom="true"
         android:clipToPadding="false"
       android:clipChildren="false"
         android:layout_height="wrap_content">
    <android.support.v7.widget.CardView
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:elevation="8dp"
         android:divider="@android:color/transparent"
         android:dividerHeight="0.0px"
         android:clipToPadding="false"
         android:clipChildren="false"
         card_view:cardElevation="10dp"
         card_view:cardPreventCornerOverlap="false">

      <TextView
          android:layout_width="match_parent"
          android:padding="20dp"
          android:layout_height="wrap_content"
          android:text="Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed
          do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim
          veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo
          consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse
          cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident,
          sunt in culpa qui officia deserunt mollit anim id est laborum"
        />
    </android.support.v7.widget.CardView>
  </LinearLayout>

</RelativeLayout>

还有一张关于它的外观的图片：

原文由 Stefanija 发布，翻译遵循 CC BY-SA 3.0 许可协议

Answer 2

通过向您的卡片视图添加边距

<LinearLayout
        android:layout_width="match_parent"
        android:layout_alignParentBottom="true"
        android:shadowColor="#000"
        android:shadowDx="0"
        android:shadowDy="30"
        android:shadowRadius="50"
        android:layout_height="wrap_content">

        <android.support.v7.widget.CardView
            xmlns:app="http://schemas.android.com/apk/res-auto"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:elevation="8dp"
            android:divider="@android:color/transparent"
            android:dividerHeight="0.0px"
            android:clipToPadding="false"
            android:clipChildren="false"
            app:cardElevation="10dp"
            android:layout_margin="4dp"
            app:cardPreventCornerOverlap="false">

            <!--rest of the code-->
        </android.support.v7.widget.CardView>
    </LinearLayout>

原文由 Mujammil Ahamed 发布，翻译遵循 CC BY-SA 3.0 许可协议