android - 重启 AnimatedVectorDrawableCompat 的 AnimatorSet

Question

这是我需要通过AnimatedVectorDrawableCompat实现的效果。

vector_drawable_anim.xml

<animated-vector xmlns:android="http://schemas.android.com/apk/res/android"
                 android:drawable="@drawable/vector_drawable">
    <target
        android:name="star"
        android:animation="@animator/star_anim"/>
</animated-vector>

vector_drawable.xml

<vector xmlns:android="http://schemas.android.com/apk/res/android"
        android:width="500px"
        android:height="500px"
        android:viewportHeight="500"
        android:viewportWidth="500">
    <group
        android:name="star_group"
        android:scaleX="5.0"
        android:scaleY="5.0">
        <path
            android:name="star"
            android:pathData="M 50.0,90.0 L 82.9193546357,27.2774101308 L 12.5993502926,35.8158045183 Z"
            android:strokeColor="@color/colorAccent"
            android:strokeWidth="1"/>
    </group>
</vector>

star_anim.xml

<set xmlns:android="http://schemas.android.com/apk/res/android"
     android:ordering="sequentially">

    <objectAnimator
        android:duration="1000"
        android:propertyName="trimPathStart"
        android:valueFrom="1"
        android:valueTo="0"/>

    <objectAnimator
        android:duration="1000"
        android:propertyName="trimPathEnd"
        android:valueFrom="1"
        android:valueTo="0"/>

</set>

但是AnimatorSet不能设置repeatMode。

如果我设置了 objectAnimator 的 repeatMode，第二个 objectAnimator 将不会显示。

我该怎么办？

Answer 1

如何在线程内循环它直到 ImageView 被销毁？

完美运行的代码示例:

  ImageView animatedImageView = (ImageView) findViewById(R.id.iv);
  AnimatedVectorDrawableCompat animatedVectorDrawable = (AnimatedVectorDrawableCompat) animatedImageView.getDrawable();

        new Thread(new Runnable() {
            public void run() {
                while (animatedImageView != null) {
                    try {
                        animatedImageView.post(new Runnable() {
                            @Override
                            public void run() {
                                animatedVectorDrawable.start();
                            }
                        });
                        Thread.sleep(500);
                    } catch (Exception e) {
                        e.printStackTrace();
                    }
                }
            }
        }).start();

或者，您可以使用 azizbekian 提到的 registerAnimationCallback()，然后是 this git gist code sample :

import android.app.Activity;
import android.graphics.drawable.Animatable;
import android.graphics.drawable.Animatable2;
import android.graphics.drawable.AnimatedVectorDrawable;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.widget.ImageView;

public class MainActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        ImageView iv = (ImageView) findViewById(R.id.pin);
        final AnimatedVectorDrawable avd = (AnimatedVectorDrawable) iv.getDrawable();
        avd.registerAnimationCallback(new Animatable2.AnimationCallback() {
            @Override
            public void onAnimationEnd(Drawable drawable) {
                avd.start();
            }
        });
        avd.start();
    }
}