我正在使用来自Support Library 23.2.0的动画向量,代码如下:
compile 'com.android.support:support-vector-drawable:23.2.0'
compile 'com.android.support:animated-vector-drawable:23.2.0'
我正在尝试对"pathData"进行动画处理(将线条形状变换为另一种)。我的代码如下所示。
drawable/ic_done.xml:
<?xml version="1.0" encoding="utf-8"?>
<vector xmlns:android="http://schemas.android.com/apk/res/android"
android:width="24dp"
android:height="24dp"
android:viewportHeight="24.0"
android:viewportWidth="24.0">
<path
android:name="tick"
android:pathData="M4.8,12L9,16.2L20,8"
android:strokeColor="#FF000000" />
</vector>
drawable/ic_done_animated.xml:
<?xml version="1.0" encoding="utf-8"?>
<animated-vector xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:drawable="@drawable/ic_done">
<target
android:name="tick"
android:animation="@animator/tick_path_animation" />
</animated-vector>
animator/tick_path_animation.xml:
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
android:ordering="sequentially">
<objectAnimator
android:duration="200"
android:propertyName="pathData"
android:valueFrom="M4.8,12L4.8,12L4.8,12"
android:valueTo="M4.8,12L9,16.2L9,16.2"
android:valueType="pathType" />
<objectAnimator
android:duration="200"
android:propertyName="pathData"
android:valueFrom="M4.8,12L9,16.2L9,16.2"
android:valueTo="M4.8,12L9,16.2L20,8"
android:valueType="pathType" />
</set>
Java 代码:
ImageView vImgAnimated = findByViewId(R.id.img);
AnimatedVectorDrawableCompat animatedVector = AnimatedVectorDrawableCompat.create(getContext(), R.drawable.ic_done_animated);
vImgAnimated.setImageDrawable(animatedVector);
animatedVector.start();
它在API级别为21的新设备上运行良好,但在API级别为16的设备上存在问题:
java.lang.NumberFormatException: Invalid int: "M4.8,12L4.8,12L4.8,12"
at java.lang.Integer.invalidInt(Integer.java:138)
at java.lang.Integer.parse(Integer.java:375)
at java.lang.Integer.parseInt(Integer.java:366)
at com.android.internal.util.XmlUtils.convertValueToInt(XmlUtils.java:123)
at android.content.res.TypedArray.getInt(TypedArray.java:254)
at android.animation.AnimatorInflater.loadAnimator(AnimatorInflater.java:258)
at android.animation.AnimatorInflater.loadObjectAnimator(AnimatorInflater.java:161)
at android.animation.AnimatorInflater.createAnimatorFromXml(AnimatorInflater.java:117)
at android.animation.AnimatorInflater.createAnimatorFromXml(AnimatorInflater.java:126)
at android.animation.AnimatorInflater.createAnimatorFromXml(AnimatorInflater.java:93)
at android.animation.AnimatorInflater.loadAnimator(AnimatorInflater.java:72)
at android.support.graphics.drawable.AnimatedVectorDrawableCompat.inflate(AnimatedVectorDrawableCompat.java:377)
at android.support.graphics.drawable.AnimatedVectorDrawableCompat.createFromXmlInner(AnimatedVectorDrawableCompat.java:162)
at android.support.graphics.drawable.AnimatedVectorDrawableCompat.create(AnimatedVectorDrawableCompat.java:142)
根据文章android-support-library-232,支持动画矢量图(AnimatedVectorDrawableCompat)的API级别可追溯到11级。看起来在读取tick_path_animation.xml中的valueFrom属性时出现了错误。该属性类型“pathType”可能尚未得到支持。有什么解决方法吗?