Android的objectAnimator动画布局的backgroundColor [英] Android objectAnimator animate backgroundColor of Layout

问题描述

我有一个问题。我想一个的LinearLayout ，使用 objectanimator 的动画背景颜色。维基，问题是，它的动画，但它确实对时间既不关心也不 valueFrom 和 valueTo 。

I have a problem. I want to animate the background color of a LinearLayout, using objectanimator.
The problem is that it animates, but it does neither care about duration nor valueFrom and valueTo.

这是我的xml文件：

<objectAnimator xmlns:android="http://schemas.android.com/apk/res/android"
android:duration="2000"
android:propertyName="backgroundColor"
android:repeatCount="infinite"
android:repeatMode="reverse"
android:valueFrom="#FF0000"
android:valueTo="#000000" />

在Java的我称之为是这样的：

In Java I call like this:

    ObjectAnimator objAnim = (ObjectAnimator)AnimatorInflater.loadAnimator(getActivity(), R.animator.animator_bkg);
    objAnim.setTarget(view);
    objAnim.start();

请注意，当我动画布局的α，它将按预期工作。
这是（华硕变压器4.0.3）是Android的bug，还是我错过了什么？

Note that when I animate the alpha of the layout, it works as expected.
Is this an Android bug (4.0.3 on Asus Transformer), or I miss something?

推荐答案

我GOOGLE了一下。有一个答案。尝试使用TransitionDrawable。 <一href="http://developer.android.com/guide/topics/resources/drawable-resource.html#Transition">http://developer.android.com/guide/topics/resources/drawable-resource.html#Transition

I googled a bit. There is an answer. Try to use TransitionDrawable. http://developer.android.com/guide/topics/resources/drawable-resource.html#Transition

此外，有某处stackoverflow.com专用于相同的问题的一个话题。

Also, there is a topic somewhere on stackoverflow.com dedicated to the same problem.

ADDED code例如：

ADDED Code example:

    Button btn = (Button)this.findViewById(R.id.btn1);
    //Let's change background's color from blue to red.
    ColorDrawable[] color = {new ColorDrawable(Color.BLUE), new ColorDrawable(Color.RED)};
    TransitionDrawable trans = new TransitionDrawable(color);
    //This will work also on old devices. The latest API says you have to use setBackground instead.
    btn.setBackgroundDrawable(trans);
    trans.startTransition(5000);

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