解决方案：
我解决这个问题的方法是实现一个监听器View.OnClickListener 到ViewHolder 类extends RecyclerView.ViewHolder。于是我们得到如下代码：
public static class ExampleViewHolder extends RecyclerView.ViewHolder
implements View.OnClickListener {
private int originalHeight = 0;
private boolean isViewExpanded = false;
private YourCustomView yourCustomView
// ..... CODE ..... //
}
在动画过程中使用了变量originalHeight和isViewExpanded。在构造函数中，我将视图初始化为View.OnClickListener，如下所示：
public ExampleViewHolder(View v) {
super(v);
v.setOnClickListener(this);
// Initialize other views, like TextView, ImageView, etc. here
// If isViewExpanded == false then set the visibility
// of whatever will be in the expanded to GONE
if (isViewExpanded == false) {
// Set Views to View.GONE and .setEnabled(false)
yourCustomView.setVisibility(View.GONE);
yourCustomView.setEnabled(false);
}
}
现在构造函数已经处理好了，我们要配置当用户单击单个 RecyclerView 项目时会发生什么。这里有用的类是ValueAnimator 和Animation 对象。我们像这样重写onClick 方法来完成这个：
@Override
public void onClick(final View view) {
// If the originalHeight is 0 then find the height of the View being used
// This would be the height of the cardview
if (originalHeight == 0) {
originalHeight = view.getHeight();
}
// Declare a ValueAnimator object
ValueAnimator valueAnimator;
if (!mIsViewExpanded) {
yourCustomView.setVisibility(View.VISIBLE);
yourCustomView.setEnabled(true);
mIsViewExpanded = true;
valueAnimator = ValueAnimator.ofInt(originalHeight, originalHeight + (int) (originalHeight * 2.0)); // These values in this method can be changed to expand however much you like
} else {
mIsViewExpanded = false;
valueAnimator = ValueAnimator.ofInt(originalHeight + (int) (originalHeight * 2.0), originalHeight);
Animation a = new AlphaAnimation(1.00f, 0.00f); // Fade out
a.setDuration(200);
// Set a listener to the animation and configure onAnimationEnd
a.setAnimationListener(new Animation.AnimationListener() {
@Override
public void onAnimationStart(Animation animation) {
}
@Override
public void onAnimationEnd(Animation animation) {
yourCustomView.setVisibility(View.INVISIBLE);
yourCustomView.setEnabled(false);
}
@Override
public void onAnimationRepeat(Animation animation) {
}
});
// Set the animation on the custom view
yourCustomView.startAnimation(a);
}
valueAnimator.setDuration(200);
valueAnimator.setInterpolator(new AccelerateDecelerateInterpolator());
valueAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
public void onAnimationUpdate(ValueAnimator animation) {
Integer value = (Integer) animation.getAnimatedValue();
view.getLayoutParams().height = value.intValue();
view.requestLayout();
}
});
valueAnimator.start();
}
现在，当您在 RecyclerView 上触摸单个卡片视图时（假设您有 CardView 设置，那么它应该展开。确保在您的 xml 文件中正确声明您的 customView（例如，如果您想要 CardView当您触摸它时向下展开，然后在其他视图下方正确分配 customView 并在声明它时将可见性设置为消失，然后当动画开始时，如上面的代码中那样，然后将可见性设置为 Visible 并启用视图。
希望这可以帮助某人。