如何重新启动android AnimatedVectorDrawables动画？

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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。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.

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.

not