RoundImageView

<declare-styleable name="RoundImageView">
     <attr name="image_radius" format="dimension" />//圆角大小
     <attr name="image_shadow_radius" format="dimension" />//阴影大小
     <attr name="image_circle" format="boolean" />//是否圆形
     <attr name="image_shadow" format="boolean" />//是否阴影
     <attr name="shadow_color" format="integer"/>//阴影颜色
</declare-styleable>


<com.xiangpan.roundimageview.RoundImageView
     android:layout_width="300dp"
     android:layout_height="200dp"
     android:layout_gravity="center_horizontal"
     android:src="@mipmap/tu"
     app:image_shadow="true"
     app:image_radius = "16dp"
     app:image_shadow_radius="20dp"/>