android - 换个角不画背景？

Question

我想创建一个有不同角的 View ，形状的xml如下:

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle">

<solid android:color="#01A2EA" />

<corners
    android:bottomLeftRadius="30dp"
    android:bottomRightRadius="30dp"
    android:radius="30dp"
    android:topLeftRadius="30dp"
    android:topRightRadius="30dp" />

</shape>

它在蓝色背景下表现良好，但在我更改了四个角半径中的两个之后:

<corners
    android:bottomLeftRadius="30dp"
    android:bottomRightRadius="30dp"
    android:radius="30dp"
    android:topLeftRadius="0dp"
    android:topRightRadius="0dp" />

它失去了背景颜色，我什么也看不见。

API 文档说:

Note: Every corner must (initially) be provided a corner radius greater than 1, or else no corners are rounded. If you want specific corners to not be rounded, a work-around is to use android:radius to set a default corner radius greater than 1, but then override each and every corner with the values you really want, providing zero ("0dp") where you don't want rounded corners.

但它似乎不能与背景一起正常工作？

Answer 1

是的，你是对的，有一个错误，但你可以这样解决它。

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle">

    <solid android:color="#01A2EA" />

    <corners
        android:bottomRightRadius="30dp"
        android:bottomLeftRadius="30dp"
        android:topRightRadius="0.1dp"
        android:topLeftRadius="0.1dp"/>
</shape>

注意:

这可能不会反射(reflect)在设计时。所以请运行代码看看效果。