Set the View to display only the transparent bottom border, transparent background box, and shadow background box.

Set the View to display only the transparent bottom border, transparent background box, and shadow background box.

The implementation result is as follows:

 

The following code implements an xml with a border, which is very common.

<?xml version="1.0" encoding="utf-8"?><shape xmlns:android="http://schemas.android.com/apk/res/android">    <solid android:color="@android:color/transparent" /><stroke android:width="1dp" android:color="#FFFF0000" /> <corners android:radius="0dp" /></shape>

The following shows only the xml of the lower border

<?xml version="1.0" encoding="utf-8"?><shape xmlns:android="http://schemas.android.com/apk/res/android">    <solid android:color="@android:color/transparent" /><stroke android:width="1dp" android:color="#FFFF0000" /> <corners android:radius="0dp" /></shape>

The following is the background of the shadow effect.

<?xml version="1.0" encoding="utf-8"?><layer-list xmlns:android="http://schemas.android.com/apk/res/android">    <!-- Bottom 2dp Shadow -->    <item>        <shape  android:shape="rectangle">            <solid android:color="#BBB" />            <corners android:radius="5dp" />                 </shape>    </item>        <!-- White Top color -->    <item android:bottom="3px">        <shape  android:shape="rectangle">             <solid android:color="#FFE0EEEE" />             <corners android:radius="5dp" />             <padding                android:top="15dp"                android:right="15dp"                android:bottom="15dp"                android:left="15dp"/>        </shape>           </item></layer-list>

Click set their background color:

public void onClick(View v) {switch (v.getId()) {case R.id.btnShowCountTimer :new MyCountTimer(120000, 1000, btnShowCountTimer).start();break;case R.id.btnBgBoard :btnBgBoard.setBackgroundResource(R.drawable.board);break;case R.id.btnOnlyShowLineBottom :btnOnlyShowLineBottom.setBackgroundResource(R.drawable.board_only_bottom_line);break;case R.id.btnShowLayers :btnShowLayers.setBackgroundResource(R.drawable.board_layers);break;default :break;}}