相关疑难解决方法(0)

我TransitionDrawable在xml中定义如下：

转换.xml

<?xml version="1.0" encoding="utf-8"?>
<transition xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:drawable="@drawable/ic_disabled" />
    <item android:drawable="@drawable/ic_enabled" />
</transition>

我用它来动画复选框的状态变化：

val stateDrawable = ContextCompat.getDrawable(this, R.drawable.transition) as TransitionDrawable
checkbox.buttonDrawable = stateDrawable
checkbox.setOnCheckedChangeListener { icon, checked -> 
    if (checked) {
        stateDrawable.startTransition(300) 
    } else {
        stateDrawable.reverseTransition(300)
    }
}

如果@drawable/ic_disabled和@drawable/ic_enabled是png文件，则一切正常。但如果它们是矢量绘图，则过渡不起作用。我缺少什么？不TransitionDrawable支持矢量绘图？