有关Android RecyclerView item中组件的宽高的动态修改的问题

Question

以下是代码：

MainActivity：

recyclerView是一个RecyclerView

recyclerView.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
    @Override
    public void onGlobalLayout() {
        UpdaterController controller = mUpdaterService == null ? null : mUpdaterService.getUpdaterController();
        if(controller != null && mAdapter != null) {
            List<UpdateInfo> updates = controller.getUpdates();
            for (int i = 0; i < recyclerView.getChildCount(); i++) {
                UpdateInfo update = updates.get(i);
                View view = recyclerView.getLayoutManager().findViewByPosition(i);
                LinearLayout mBtnsLayout = (LinearLayout) view.findViewById(R.id.update_btns);
                ImageButton mAction = (ImageButton) view.findViewById(R.id.update_action);
                ImageButton mShowChangelog = (ImageButton) view.findViewById(R.id.show_changelog);
                CardView mCard = (CardView) view.findViewById(R.id.update_card);
                Space mBtnsSpace = (Space) view.findViewById(R.id.update_btns_space);
                OnlineImageView mImageView = view.findViewById(R.id.update_imageView);

                int btnsHeight = mBtnsLayout.getMeasuredHeight();
                int cardHeight = mCard.getMeasuredHeight();
                mBtnsLayout.setLayoutParams((LinearLayout.LayoutParams)Utils.getLayoutParams(btnsHeight, btnsHeight, mBtnsLayout));
                mImageView.setImageURL(update.getImageUrl());
                int w = ((mImageView.getImageHeight() * mImageView.getImageWidth()) == 0 ? 0 : (cardHeight * mImageView.getImageWidth() / mImageView.getImageHeight()));
                mImageView.setLayoutParams((RelativeLayout.LayoutParams)Utils.getLayoutParams(w, cardHeight, mImageView));
                mAction.setLayoutParams((LinearLayout.LayoutParams)Utils.getLayoutParams((int) (btnsHeight * 0.6), (int) (btnsHeight * 0.6), mAction));
                mShowChangelog.setLayoutParams((LinearLayout.LayoutParams)Utils.getLayoutParams((int) (btnsHeight * 0.3), (int) (btnsHeight * 0.3), mShowChangelog));
                mBtnsSpace.setLayoutParams((LinearLayout.LayoutParams)Utils.getLayoutParams(btnsHeight - mAction.getMeasuredHeight() - mShowChangelog.getMeasuredHeight(), btnsHeight, mBtnsSpace));
                mAdapter.notifyItemChanged(i);
            }
            recyclerView.getViewTreeObserver().removeOnGlobalLayoutListener(this);
        }
    }
});

以下是Utils.getLayoutParams函数：

public static ViewGroup.LayoutParams getLayoutParams(int tw, int th, View view) {
    ViewGroup.LayoutParams params = view.getLayoutParams();
    params.width = tw;
    params.height = th;
    return params;
}

Debug发现，在上面的第一个代码块执行完毕后，各个控件的LayoutParams发生了改变，其中的宽高与传入值相符，而在控件中的mMessuredWidth和mMessuredHeight的值却均没有变化，也就是实际显示的宽高并未改变。

这是我的仓库：https://github.com/SF2005/Updater

希望能得到个解决方案，或者告诉我，你也不觉得有问题，谢谢各位了！！！！

这几天真是烦死我了??

Answer 1

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Answer 2

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Answer 3

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