ui设计外框

如图所示:
任意View或者layout里边添加背景:  android:background="@drawable/bg_corners_pressed"
自定义背景bg_corners_pressed.xml : <?xml version="1.0" encoding="UTF-8"?>
<shape
  xmlns:android="http://schemas.android.com/apk/res/android">
    <solid android:color="@color/white" />  //内部填充颜色
    <corners android:radius="10.0dip" />    //拐角弧度
    <stroke android:width="1.0dip" android:color="@color/blue" /> //外框的颜色,线宽
</shape>