Andoird給佈局添加陰影效果

在drawable中新建一個Drawable Resource File

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item>
    <shape android:shape="rectangle">
        <padding
            android:bottom="2dp"
            android:left="2dp"
            android:right="2dp"
            android:top="0dp" />
        <solid android:color="#0DCCCCCC" />
        <corners android:radius="8dp" />
    </shape>
</item>
<item>
    <shape android:shape="rectangle">
        <padding
            android:bottom="2dp"
            android:left="2dp"
            android:right="2dp"
            android:top="0dp" />
        <solid android:color="#10CCCCCC" />
        <corners android:radius="8dp" />
    </shape>
</item>
<item>
    <shape android:shape="rectangle">
        <padding
            android:bottom="2dp"
            android:left="2dp"
            android:right="2dp"
            android:top="0dp" />
        <solid android:color="#15CCCCCC" />
        <corners android:radius="8dp" />
    </shape>
</item>
<item>
    <shape android:shape="rectangle">
        <padding
            android:bottom="2dp"
            android:left="2dp"
            android:right="2dp"
            android:top="0dp" />
        <solid android:color="#20CCCCCC" />
        <corners android:radius="8dp" />
    </shape>
</item>
<item>
    <shape android:shape="rectangle">
        <padding
            android:bottom="2dp"
            android:left="2dp"
            android:right="2dp"
            android:top="0dp" />
        <solid android:color="#25CCCCCC" />
        <corners android:radius="8dp" />
    </shape>
</item>
<item>
    <shape>
        <solid android:color="#FFFFFF" />
        <corners android:radius="4dp" />
    </shape>
</item>

然後在給View或者ViewGroup添加background就可以了