如何重新启动android AnimatedVectorDrawables动画？ [英] How to restart android AnimatedVectorDrawables animations?
问题描述
我有一个想要绘制动画的复杂矢量可绘制对象。
我使用 @RomanNurik的网络工具从svg创建动画
I have a kinda complex vector drawable that I want to animate. I used @RomanNurik's web tool to create the animation from a svg
根据<动画矢量> /reference/android/graphics/drawable/AnimatedVectorDrawable.html rel = noreferrer>文档。这是一个多合一的XML文件。
That gives me a valid <animated-vector> according to the documentatios. It's an "all in one" XML file.
该xml的可绘制对象分为2组，每组包含2个路径，还添加了4个动画，如下所示：
The xml has the drawable divided in 2 groups, each group containing 2 paths and has also added 4 animations, just as follows:
<animated-vector xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:aapt="http://schemas.android.com/aapt">
<aapt:attr name="android:drawable">
<vector xmlns:android="http://schemas.android.com/apk/res/android"
android:width="56dp"
android:height="56dp"
android:viewportHeight="56.0"
android:viewportWidth="56.0">
<group
android:name="group_1"
android:pivotX="25"
android:pivotY="25">
<path
android:name="path_3_1"
... />
<path
android:name="path"
... />
</group>
<group
android:name="group"
android:pivotX="25"
android:pivotY="25">
<path
android:name="path_1"
... />
<path
android:name="path_2"
... />
</group>
</vector>
</aapt:attr>
<target android:name="path">
<aapt:attr name="android:animation">
<set xmlns:android="http://schemas.android.com/apk/res/android">
<objectAnimator
android:name="path"
... />
<objectAnimator
android:name="path"
.../>
</set>
</aapt:attr>
</target>
<target android:name="group_1">
<aapt:attr name="android:animation">
<set xmlns:android="http://schemas.android.com/apk/res/android">
<objectAnimator
android:name="group_1"
... />
<objectAnimator
android:name="group_1"
... />
<objectAnimator
android:name="group_1"
... />
<objectAnimator
android:name="group_1"
... />
</set>
</aapt:attr>
</target>
<target android:name="group">
<aapt:attr name="android:animation">
<set xmlns:android="http://schemas.android.com/apk/res/android">
<objectAnimator
android:name="group"
... />
<objectAnimator
android:name="group"
... />
<objectAnimator
android:name="group"
... />
<objectAnimator
android:name="group"
... />
</set>
</aapt:attr>
</target>
<target android:name="path_3_1">
<aapt:attr name="android:animation">
<set xmlns:android="http://schemas.android.com/apk/res/android">
<objectAnimator
android:name="path_3_1"
... />
<objectAnimator
android:name="path_3_1"
... />
</set>
</aapt:attr>
</target>
</animated-vector>
问题编号1：
我不能使用 android：repeatCount = infinite ，因为 ObjectAnimators 具有不同的 android：duration 和 android：startOffset 的值，在某些运行后会使动画混乱。因此，方法是以编程方式重复该步骤。足够公平。
Issue number 1:
I cannot use android:repeatCount="infinite" since the ObjectAnimators have different android:duration and android:startOffset values, that would mess up the animation after some runs. So the way to go is repeat it programmatically. Fair enough.
AnimatedVectorDrawableCompat或AnimatedVectorDrawable都没有
Neither AnimatedVectorDrawableCompat or AnimatedVectorDrawable have a method that says animation should loop.
AnimatedVectorDrawableCompat 没有 registerAnimationCallback（ ），这样我就可以收听 onAnimationEnd 并重新启动动画了。在这一点上，我放弃了追溯兼容性。
AnimatedVectorDrawableCompat does not have a registerAnimationCallback() so I can listen to onAnimationEnd and restart the animation myself. At this point, I gave up on retrocompatibility.
我目前使用的实现是<$来自 AnimatedVectorDrawable 的c $ c> registerAnimationCallback（）仅在android API 25上有效，即使该方法已在API 23中添加
The current implementation I have that uses registerAnimationCallback() from AnimatedVectorDrawable only works at android API 25, even though the methods were added in API 23
AnimatedVectorDrawable drawable = (AnimatedVectorDrawable) context().getDrawable(R.drawable.long_press_anim);
imageView.setImageDrawable(drawable);
drawable.registerAnimationCallback(new Animatable2.AnimationCallback() {
@Override
public void onAnimationEnd(Drawable drawable) {
super.onAnimationEnd(drawable);
((AnimatedVectorDrawable) drawable).start();
}
});
drawable.start();
在API 23和24中，动画是单发运行，不会重复。
In API 23 and 24 the animation runs as a one-shot, it does not repeat.
任何想法如何解决这个问题？我要放弃并改用狗屎png序列。
Any ideas how to solve this? I;m about to give up and use a shit png sequence instead.
推荐答案
官方的有效答案在这里： https://issuetracker.google.com/issues/64591234
The official and working answer is here: https://issuetracker.google.com/issues/64591234
此代码可用于> = API 16（可能也是14-15）。我正在使用支持库26.1.0和 vectorDrawables.useSupportLibrary = true （所以我可以在xml中引用矢量可绘制而不会崩溃）
This code works with >= API 16 (probably also 14-15). I'm using support library 26.1.0 and vectorDrawables.useSupportLibrary = true (so I can refer to a vector drawable in xml without crashing)
animatedVector = AnimatedVectorDrawableCompat.create(getContext(), R.drawable.animated_clock);
ringingAlarmImage.setImageDrawable(animatedVector);
final Handler mainHandler = new Handler(Looper.getMainLooper());
animatedVector.registerAnimationCallback(new Animatable2Compat.AnimationCallback() {
@Override
public void onAnimationEnd(final Drawable drawable) {
mainHandler.post(new Runnable() {
@Override
public void run() {
animatedVector.start();
}
});
}
});
animatedVector.start();
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