以前的備注，今天翻出來寫個博客記錄一下, RecyclerView的item布局設(shè)置match_parent經(jīng)常不起作用，可以在代碼中填充布局時這樣寫：

    @Override
    public Main2ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        return new Main2ViewHolder(LayoutInflater.from(mContext).inflate(R.layout.item,parent,false));
    }

因?yàn)樵创a中有如下內(nèi)容

                    if (root != null) {
                        if (DEBUG) {
                            System.out.println("Creating params from root: " +
                                    root);
                        }
                        // Create layout params that match root, if supplied
                        params = root.generateLayoutParams(attrs);
                        if (!attachToRoot) {
                            // Set the layout params for temp if we are not
                            // attaching. (If we are, we use addView, below)
                            temp.setLayoutParams(params);
                        }
                    }