如何在位图绘制中保持纵横比?

How I can keep aspect ratio if I am using gravity fill_vertical or fill_horizontal? In this code:

如果我使用重力fill_vertical或fill_horizontal，如何保持纵横比?在这段代码中:

<?xml version="1.0" encoding="utf-8"?>
<bitmap xmlns:android="http://schemas.android.com/apk/res/android" 
    android:src="@drawable/_toogle_green"
    android:gravity="bottom|fill_vertical"
/>

bitmap fills vertical, but in horizontal keeps original width and aspect ratio is broken.

位图填充垂直，但在水平保持原来的宽度和纵横比被破坏。

I believe this question was asked, but I really can't find it, only for ImageView or ImageButton. But I need do that in drawables.

我相信有人问过这个问题，但是我真的找不到，只有ImageView或ImageButton。但我需要用drawables来做。

2 个解决方案

#1

Try this one:

试试这个:

<item>
     <bitmap
          android:gravity="center|bottom|clip_vertical"
          android:src="@drawable/your_image" />
</item>

#2

You need to set the ScaleType. See this link to the documentation for more info.

您需要设置ScaleType。有关更多信息，请参见此链接到文档。