Adding shadow effects to make the controls or layout look three-dimensional. In general, there are two solutions.
1. Directly use the attribute: android:elevation="4dp" code to achieve the effect. elevation represents the altitude, which is the height of the z-axis of the layout. Adjust the height, and you can choose the severity of the shadow.
<TextView
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:gravity="center"
android:elevation="4dp"
android:background="@drawable/home_waitcourse_yellow_shape"
android:textColor="@color/foorYellow"
android:text="Report"/>
2. This method requires writing some code, but not much, it is achieved by writing an XML.
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:andro >
<!-- Shadow part -->
<!-- Personally, I think it's more vivid：topRepresents the height of the shadow below，leftRepresents the shadow width on the right。Actually, it's the correspondingoffset，solidThe color in it is the color of the shadow，You can also set angles, etc. -->
<item
android:left="2dp"
android:top="2dp"
android:right="2dp"
android:bottom="2dp">
<shape android:shape="rectangle" >
<gradient
android:angle="270"
android:endColor="#0F000000"
android:startColor="#0F000000" />
<corners
android:bottomLeftRadius="6dip"
android:bottomRightRadius="6dip"
android:topLeftRadius="6dip"
android:topRightRadius="6dip" />
</shape>
</item>
<!-- Background part -->
<!-- Expression of image：bottom代表Background part在上边缘超出阴影的高度，right代表Background part在左边超出阴影的宽度（Correspondingoffset） -->
<item
android:left="3dp"
android:top="3dp"
android:right="3dp"
android:bottom="5dp">
<shape android:shape="rectangle" >
<gradient
android:angle="270"
android:endColor="#FFFFFF"
android:startColor="#FFFFFF" />
<corners
android:bottomLeftRadius="6dip"
android:bottomRightRadius="6dip"
android:topLeftRadius="6dip"
android:topRightRadius="6dip" />
</shape>
</item>
</layer-list>
The above is all the content of this article. I hope it will be helpful to everyone's study and I hope everyone will support me more.