Android 如何制作左上圆角和左下圆角的形状？
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How to make a shape with left-top round rounded corner and left-bottom rounded corner?
提问by user256239
I want to make a shape with with left-top rounded corner and left-bottom rounded corner:
我想用左上圆角和左下圆角制作一个形状：
<?xml version="1.0" encoding="UTF-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
<solid android:color="#555555"/>
<stroke android:width="3dp"
android:color="#555555"
/>
<padding android:left="1dp"
android:top="1dp"
android:right="1dp"
android:bottom="1dp"
/>
<corners android:bottomRightRadius="0dp" android:bottomLeftRadius="2dp"
android:topLeftRadius="2dp" android:topRightRadius="0dp"/>
</shape>
But the shape above didn't give me what I want. It gives me a rectangle without any rounded corners.
但是上面的形状没有给我想要的。它给了我一个没有任何圆角的矩形。
回答by Geoff
While this question has been answered already (it's a bug that causes bottomLeftRadius and bottomRightRadius to be reversed), the bug has been fixed in android 3.1 (api level 12 - tested on the emulator).
虽然已经回答了这个问题（这是一个导致 bottomLeftRadius 和 bottomRightRadius 被反转的错误），但该错误已在 android 3.1（api 级别 12 - 在模拟器上测试）中得到修复。
So to make sure your drawables look correct on all platforms, you should put "corrected" versions of the drawables (i.e. where bottom left/right radii are actually correct in the xml) in the res/drawable-v12 folder of your app. This way all devices using an android version >= 12 will use the correct drawable files, while devices using older versions of android will use the "workaround" drawables that are located in the res/drawables folder.
因此，为了确保您的可绘制对象在所有平台上看起来都正确，您应该将可绘制对象的“修正”版本（即 xml 中左下/右下半径实际上正确的位置）放在应用程序的 res/drawable-v12 文件夹中。这样，所有使用 android 版本 >= 12 的设备都将使用正确的可绘制文件，而使用旧版本 android 的设备将使用位于 res/drawables 文件夹中的“解决方法”可绘制文件。
回答by user256239
It looks like a bug http://code.google.com/p/android/issues/detail?id=939.
它看起来像一个错误http://code.google.com/p/android/issues/detail?id=939。
Finally I have to write something like this:
最后我必须写这样的东西：
<stroke android:width="3dp"
android:color="#555555"
/>
<padding android:left="1dp"
android:top="1dp"
android:right="1dp"
android:bottom="1dp"
/>
<corners android:radius="1dp"
android:bottomRightRadius="2dp" android:bottomLeftRadius="0dp"
android:topLeftRadius="2dp" android:topRightRadius="0dp"/>
I have to specify android:bottomRightRadius="2dp" for left-bottom rounded corner (another bug here).
我必须为左下圆角指定 android:bottomRightRadius="2dp" （这里的另一个错误）。
回答by Entreco
From the documentation:
从文档：
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.
注意：必须（最初）为每个角提供大于 1 的圆角半径，否则没有圆角。如果您希望特定的角不被圆角，解决方法是使用 android:radius 设置大于 1 的默认角半径，然后用您真正想要的值覆盖每个角，提供零（“0dp” ) 不想要圆角的地方。
E.g. you have to set an android:radius="<bigger than 1dp>"to be able to do what you want:
例如，您必须设置 anandroid:radius="<bigger than 1dp>"才能执行您想要的操作：
<corners
android:radius="2dp"
android:bottomRightRadius="0dp"
android:topRightRadius="0dp"/>
回答by Moncader
You can also use extremely small numbers for your radius'.
您还可以为半径使用极小的数字。
<corners
android:bottomRightRadius="0.1dp" android:bottomLeftRadius="2dp"
android:topLeftRadius="2dp" android:topRightRadius="0.1dp" />
回答by Williams
for others there are a solution for any API level , you can place a item on top of each other example :
对于其他人，有任何 API 级别的解决方案，您可以将一个项目放在彼此的顶部，例如：
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android" >
<!-- my firt item with 4 corners radius(8dp)
-->
<item>
<shape>
<solid
android:angle="270.0"
android:color="#3D689A" />
<corners android:topLeftRadius="8dp" />
</shape>
</item>
<!-- my second item is on top right for a fake corner radius(0dp)
-->
<item
android:bottom="30dp"
android:left="50dp">
<shape>
<solid android:color="#5C83AF" />
</shape>
</item>
<!-- my third item is on bottom left for a fake corner radius(0dp)
-->
<item
android:right="50dp"
android:top="30dp">
<shape>
<solid android:color="#5C83AF" />
</shape>
</item>
</layer-list>
the result with light color to show you the three items :
浅色结果显示三个项目：
the final result :
最终结果：
Best regards.
此致。
回答by Reaz Murshed
This bug is filed here. This is a bug of android devices having API level less than 12. You've to put correct versions of your layouts in drawable-v12 folder which will be used for API level 12 or higher. And an erroneous version(corners switched/reversed) of the same layout will be put in the default drawable folder which will be used by the devices having API level less than 12.
这个错误被归档在这里。这是 API 级别低于 12 的 Android 设备的错误。您必须将正确版本的布局放在 drawable-v12 文件夹中，该文件夹将用于 API 级别 12 或更高级别。并且相同布局的错误版本（转角/反转）将放在默认的可绘制文件夹中，该文件夹将由 API 级别小于 12 的设备使用。
For example: I had to design a button with rounded corner at bottom-right.
例如：我必须在右下角设计一个带圆角的按钮。
In 'drawable' folder - button.xml:I had to make bottom-left corner rounded.
在“drawable”文件夹中 - button.xml：我必须使左下角变圆。
<shape>
<corners android:bottomLeftRadius="15dp"/>
</shape>
In 'drawable-v12' folder - button.xml:Correct version of the layout was placed here to be used for API level 12 or higher.
在“drawable-v12”文件夹中 - button.xml：此处放置了正确版本的布局以用于 API 级别 12 或更高版本。
<shape>
<corners android:bottomLeftRadius="15dp"/>
</shape>
回答by Sai Gopi N
try this
尝试这个
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
<solid android:color="@color/upkia"/>
<corners android:radius="10dp"
android:topRightRadius="0dp"
android:bottomRightRadius="0dp" />
</shape>
