本文介绍了在Android上对视图背景颜色进行动画处理的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

如何在Android上为视图背景颜色的变化设置动画?

How do you animate the change of background color of a view on Android?

例如:

我有一个红色背景的视图。视图的背景颜色变为蓝色。我该如何在颜色之间进行平滑过渡?

I have a view with a red background color. The background color of the view changes to blue. How can I do a smooth transition between colors?

如果无法通过视图完成操作,将欢迎使用替代方法。

If this can't be done with views, an alternative will be welcome.

推荐答案

我最终想出了一个解决这个问题的(非常好的)解决方案!

I ended up figuring out a (pretty good) solution for this problem!

您可以使用即可实现。例如,在drawable文件夹中的XML文件中,您可以编写如下内容:

You can use a TransitionDrawable to accomplish this. For example, in an XML file in the drawable folder you could write something like:

<?xml version="1.0" encoding="UTF-8"?>
<transition xmlns:android="http://schemas.android.com/apk/res/android">
    <!-- The drawables used here can be solid colors, gradients, shapes, images, etc. -->
    <item android:drawable="@drawable/original_state" />
    <item android:drawable="@drawable/new_state" />
</transition>

然后,在XML中获取实际的View,您可以在 android:background 属性。

Then, in your XML for the actual View you would reference this TransitionDrawable in the android:background attribute.

这时,您可以通过以下方式在代码中启动转换:

At this point you can initiate the transition in your code on-command by doing:

TransitionDrawable transition = (TransitionDrawable) viewObj.getBackground();
transition.startTransition(transitionTime);

或通过调用以下命令进行反向转换:

Or run the transition in reverse by calling:

transition.reverseTransition(transitionTime);






请参见,该解决方案最初发布时尚不可用。


See Roman's answer for another solution using the Property Animation API, which wasn't available at the time this answer was originally posted.

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08-01 11:17