<shape xmlns:android="http://schemas.android.com/apk/res/android">
    <solid android:color="@color/gray_white" />   背景颜色
    <corners android:radius="5dp" />              圆角大小
</shape>

<shape xmlns:android="http://schemas.android.com/apk/res/android">
    <solid android:color="@color/white" />    
    <stroke
        android:width="1dp"
        android:color="@color/pinkishGrey"></stroke>   边框
    <corners android:bottomLeftRadius="15dp"       左下圆角
        android:topLeftRadius="15dp"/>                   左上圆角
</shape>