我有文本视图和展开/折叠显示更多/更少按钮。现在我想添加平滑动画。我用objectanimator尝试了很多东西，但应用程序仍然很强大。我的代码是这样的。

public void onBindViewHolder(@NonNull final MyHolderText myHolder, int i) {
    myHolder.mTitle.setText(models.get(i).getTitle());
    myHolder.mImageView.setImageResource(models.get(i).getImage());
    myHolder.mButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            if (myHolder.mButton.getText().toString().equalsIgnoreCase(c.getString(R.string.more)))
            {
                myHolder.mDescription.setMaxLines(Integer.MAX_VALUE);
                myHolder.mButton.setText(R.string.less);
            }
            else
            {
                myHolder.mDescription.setMaxLines(5);
                myHolder.mButton.setText(R.string.more);
            }
        }
    });
    myHolder.mDescription.setText(models.get(i).getDesc());
}

此方法仅适用于展开文本。当我尝试折叠时，它只显示5行，下面有空格，就像视图没有调整大小一样。也许有什么办法可以改变它的崩溃？

@SuppressLint("Range")
public static void expandCollapsedByMaxLines(@NonNull final TextView text) {
    int height = text.getMeasuredHeight();
    text.setHeight(height);
    text.setMaxLines(Integer.MAX_VALUE); //expand fully
    text.measure(View.MeasureSpec.makeMeasureSpec(text.getMeasuredWidth(), View.MeasureSpec.EXACTLY), View.MeasureSpec.makeMeasureSpec(ViewGroup.LayoutParams.WRAP_CONTENT, View.MeasureSpec.UNSPECIFIED));
    int newHeight = text.getMeasuredHeight();
    ObjectAnimator animation = ObjectAnimator.ofInt(text, "height", height, newHeight);
    animation.setDuration(250).start();
}