动画选择/状态转换 [英] Animate selector/state transitions

问题描述

我有一个简单的选择为我的ListView

I have a simple selector for my ListView

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

    <item android:drawable="@drawable/yellow_arc" android:state_activated="true"/>
    <item android:drawable="@drawable/yellow_nonarc" android:state_activated="false"/>

</selector>

我想这些动画可绘制之间的过渡时的意见状态，从激活不激活，改变正相反。

I want to animate the transition between these drawables when the state of the views are changed from activated to not-activated and vica versa.

如果您运行的example在API的演示，而视图的激活状态改变时，你会看到一个明显的淡入/淡出动画。

If you run the example in API demos you will see an obvious fade-in/fade-out animation while the activated state of the view is changed.

所以，我要的是一个自定义动画，而视图的状态被改变。我觉得应该通过XML来实现，但我无法找到一个方法。

So what I want is a custom animation while the state of the view is changed. I think it should be done via xml but I couldn't find a way.

先谢谢了。

编辑：

我想我已经找到有用的东西有一个 activated_background.xml 在 \\ Android的\\ Android的SDK \\ \\平台Android的API_VERSION \\ DATA \\水库\\绘制包括

I guess I have found something useful there's a activated_background.xml in \Android\android-sdk\platforms\android-API_VERSION\data\res\drawable which includes

<selector xmlns:android="http://schemas.android.com/apk/res/android"
        android:exitFadeDuration="@android:integer/config_mediumAnimTime">
    <item android:state_activated="true" android:drawable="@android:drawable/list_selector_background_selected" />
    <item android:drawable="@color/transparent" />
</selector>

因此​​，在API-演示通过声明 exitFadeDuration achieveing​​这种淡出动画的例子。然而，这不是我想要 ..我想声明的自定义动画以来的淡入/淡出动画状态可绘制之间的过渡不会什么好看的我可绘。

So the example in API-demos achieveing this fade-out animation by declaring an exitFadeDuration. However, this is not exactly what I want.. I want to declare custom animations for the transition between the state drawables since the fade-in/fade-out animation does not look good for my drawables.

推荐答案

我猜的 TransitionDrawable 可以帮助你做到这一点。

I guess TransitionDrawable could help you to accomplish this.

您可以在这里检查了答案：
<一href=\"http://stackoverflow.com/questions/2614545/animate-change-of-view-background-color-in-android#answer-3208800\">Animate在Android设备上查看背景颜色的变化

You can check the answer here: Animate change of view background color in Android

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