CardView官方教程

Create Cards

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　　CardView extends the FrameLayout class and lets you show information inside cards that have a consistent look across the platform. CardView widgets can have shadows and rounded corners.

　　To create a card with a shadow, use the card_view:cardElevationattribute. CardView uses real elevation and dynamic shadows on Android 5.0 (API level 21) and above and falls back to a programmatic shadow implementation on earlier versions. For more information, see Maintaining Compatibility.

Use these properties to customize the appearance of the CardViewwidget:

• To set the corner radius in your layouts, use thecard_view:cardCornerRadius attribute.
• To set the corner radius in your code, use theCardView.setRadius method.
• To set the background color of a card, use the card_view:cardBackgroundColor attribute.

　　　　　　　　　　Figure 3. Card examples.

The following code example shows you how to include a CardView widget in your layout:

 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools"
     xmlns:card_view="http://schemas.android.com/apk/res-auto"
     ... >
     <!-- A CardView that contains a TextView -->
     <android.support.v7.widget.CardView
         xmlns:card_view="http://schemas.android.com/apk/res-auto"
         android:id="@+id/card_view"
         android:layout_gravity="center"
         android:layout_width="200dp"
         android:layout_height="200dp"
         card_view:cardCornerRadius="4dp">

         <TextView
             android:id="@+id/info_text"
             android:layout_width="match_parent"
             android:layout_height="match_parent" />
     </android.support.v7.widget.CardView>
 </LinearLayout>

For more information, see the API reference for CardView.