java - CardView 不支持 TransitionDrawable？

Question

我试图在 CardView 背景上设置一个 switch-color 的动画，但我得到了这个:

Cannot resolve method 'setCardBackgroundColor(android.graphics.drawable.TransitionDrawable)'

如果CardView不支持TransitionDrawable，那么我们如何实现这样的东西呢？

public void setCardBackground(CardView cardView) {
    ColorDrawable[] color = {new ColorDrawable(Color.BLUE), new ColorDrawable(Color.RED)};
    TransitionDrawable trans = new TransitionDrawable(color);
     //cardView.setCardBackgroundColor(trans);
    trans.startTransition(5000);
}

Answer 1

你试过了吗View#setBackground() ？

public void setCardBackground(CardView cardView) {
    ColorDrawable[] color = {new ColorDrawable(Color.BLUE), new ColorDrawable(Color.RED)};
    TransitionDrawable trans = new TransitionDrawable(color);
    if (Build.VERSION.SDK_INT > Build.VERSION_CODES.ICE_CREAM_SANDWICH_MR1) {
        cardView.setBackground(trans);
    } else {
        cardView.setBackgroundDrawable(trans);
    }
    trans.startTransition(5000);
}