How can the shadow effect be implemented in Android?

There are various methods to implement shadow effect in Android, and one commonly used method is:

1. In Android 5.0 or higher, the View’s elevation property is supported. This property can be used to add shadow effects by setting it in the XML layout file.

<View
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="@color/white"
    android:elevation="4dp"/>

1. To utilize CardView: CardView is a component with a Material Design style that includes a built-in shadow effect. You can directly use CardView to achieve the shadow effect. For example, in an XML layout file, you can use CardView to wrap the content that needs to have a shadow effect added.

<androidx.cardview.widget.CardView
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    app:cardElevation="4dp">

    <!-- 内容布局 -->

</androidx.cardview.widget.CardView>

These are two commonly used methods to achieve shadow effects in Android. Developers can choose the appropriate method based on their specific needs.