效果如图
边框设置:shape文件
<shape xmlns:android="http://schemas.android.com/apk/res/android">
<corners android:radius="5dp" />//圆角弧度
<stroke android:color="#9a9a96" android:width="1dp"/>//边框颜色,边框宽度
<solid android:color="#fff" />//背景颜色
</shape>
在AndroidStudio中添加shape.xml文件
选择res-->New-->Android resourse file
![](https://images2017.cnblogs.com/blog/842062/201709/842062-20170906143343257-405035636.png)
弹出New Resourse File窗口:选择Resource type为Drawable,Root element:选择shape,即可
![](https://images2017.cnblogs.com/blog/842062/201709/842062-20170906143411444-981733674.png)