android shape

<shape xmlns:android="http://schemas.android.com/apk/res/android">    <!-- 填充 -->    <solid android:color="#00000000" />    <!-- 描边 -->    <stroke        android:width="1.0dip"        android:color="#ffffff" />    <!-- 圆角 -->    <corners android:radius="20.0dip" />    <!--<corners        android:bottomLeftRadius="20.0dip"        android:bottomRightRadius="20.0dip"        android:topLeftRadius="20.0dip"        android:topRightRadius="20.0dip" />--></shape>