{"id":1193,"date":"2016-02-04T20:44:30","date_gmt":"2016-02-04T12:44:30","guid":{"rendered":"https:\/\/ai.zhousir.top\/?p=1193"},"modified":"2020-03-31T11:50:23","modified_gmt":"2020-03-31T03:50:23","slug":"1193","status":"publish","type":"post","link":"https:\/\/ai.zhousir.top\/?p=1193","title":{"rendered":"\u4e3aRecyclerView\u6dfb\u52a0header"},"content":{"rendered":"

\u770b\u4e86\u4e00\u4e0b\u535a\u5ba2\u76ee\u5f55\uff0c\u5df2\u7ecf\u6709\u597d\u51e0\u7bc7\u535a\u5ba2\u662f\u5173\u4e8eRecyclerView\u7684\uff0c\u4e0d\u8fc7\u5bf9\u4e8e\u8fd9\u4e48\u4e00\u6b3e\u5f3a\u5927\u7684\u63a7\u4ef6\uff0c\u6211\u8fd8\u662f\u8981\u518d\u5199\u4e00\u7bc7\u535a\u5ba2\u6765\u5b66\u4e60\u4e00\u4e0b\uff0c\u8fd9\u7bc7\u535a\u5ba2\u7684\u4e3b\u9898\u662f\u300a\u4e3aRecyclerView\u6dfb\u52a0header\u300b\uff0c\u5f53\u7136\u5728\u770b\u5b8c\u8fd9\u7bc7\u535a\u5ba2\u540e\uff0c\u76f8\u4fe1\u6dfb\u52a0Footer\u4f60\u4e5f\u5e94\u8be5\u80fd\u591f\u5b66\u4f1a\u3002\u8bdd\u8bf4\u5728\u8fd9\u4e48\u591a\u65b0\u63a7\u4ef6\u4e2d\u4e3a\u4f55RecyclerView\u5907\u53d7\u5f00\u53d1\u8005\u7684\u559c\u7231\uff1f\u8fd9\u8fd8\u662f\u56e0\u4e3a\u5728Android\u53d1\u5c55\u5230\u4eca\u5929\u57fa\u672c\u4e0a\u8fd8\u6ca1\u6709\u50cfRecyclerView\u8fd9\u4e48\u7075\u6d3b\u7684\u4e00\u4e2a\u73a9\u610f\uff0c\u9274\u4e8e\u4ed6\u7684\u7075\u6d3b\u4ee5\u53ca\u5f3a\u5927\uff0c\u5f88\u591a\u4eba(\u5305\u62ec\u6211)\u5df2\u7ecf\u5f00\u59cb\u629b\u5f03ListView\u548cGridView\u8f6c\u4e3aRecyclerView\u4e86\uff0c\u518d\u4f7f\u7528\u8fc7RecyclerView\u548c\u88ab\u5584\u53d8\u7684\u9700\u6c42\u6298\u78e8\u540e\uff0c\u6211\u76f8\u4fe1\u4f1a\u6709\u8d8a\u6765\u8d8a\u591a\u7684\u4eba\u8f6c\u5230RecyclerView\u7684\u4f7f\u7528\u4e0a\u3002<\/p>\n

\u95ee\u9898<\/h2>\n

\u597d\u4e86\uff0c\u5e9f\u8bdd\u4e0d\u591a\u8bf4\u4e86\uff0c\u8fd9\u7bc7\u535a\u5ba2\u6211\u4eec\u8981\u89e3\u51b3\u7684\u95ee\u9898\u6709\uff1a<\/p>\n

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    \n
  1. \u5982\u4f55\u4e3aRecyclerView\u6dfb\u52a0Header<\/li>\n
  2. \u5982\u4f55\u8ba9Header\u9002\u914d\u5404\u79cdLayoutManager<\/li>\n
  3. \u5728\u6709Header\u7684\u60c5\u51b5\u4e0b\uff0c\u6211\u4eec\u7684\u5206\u5272\u7ebf\u8be5\u600e\u4e48\u753b<\/li>\n
  4. \u4f5c\u4e3a\u4e00\u4e2a\u61d2\u60f0\u7684\u7a0b\u5e8f\u5458\uff0c\u5982\u4f55\u5c06\u8fd9\u4e9b\u505a\u5230\u6700\u7b80\u4fbf<\/li>\n<\/ol>\n<\/blockquote>\n

    <\/a>\u5982\u679c\u4e3aRecyclerView\u6dfb\u52a0Header<\/h2>\n

    \u5927\u5bb6\u5728\u4f7f\u7528ListView<\/code>\u7684\u65f6\u5019\u53ef\u4ee5\u5f88\u8f7b\u677e\u7684\u6dfb\u52a0headers\uff0c \u4f46\u662f\u4e0d\u77e5\u9053\u5927\u5bb6\u53d1\u73b0\u6ca1\u6709\uff0cRecyclerView<\/code>\u548c\u5404\u79cdLayoutManager<\/code>\u90fd\u6ca1\u6709\u54ea\u4e2a\u65b9\u6cd5\u662f\u4e3a\u6dfb\u52a0header\u800c\u8bbe\u7acb\u7684\uff0c\u8fd9\u4e2a\u65f6\u5019\u6211\u4eec\u5c31\u5f00\u59cb\u601d\u8003\u5982\u4f55\u4e3aRecyclerView<\/code>\u6dfb\u52a0header\u4e86\u3002 \u8fd9\u91cc\u6211\u4eec\u7684\u89e3\u51b3\u65b9\u6848\u548c\u7f51\u4e0a\u4f60\u80fd\u641c\u5230\u7684\u5927\u591a\u6570\u65b9\u6848\u4e00\u6837\uff0c\u662f\u901a\u8fc7\u63a7\u5236Adapter<\/code>\u7684itemType<\/code>\u6765\u8bbe\u7f6e\u7684\uff0c\u601d\u8def\u5c31\u662f\u6839\u636e\u4e0d\u540c\u7684itemType\u53bb\u52a0\u8f7d\u4e0d\u540c\u7684\u5e03\u5c40<\/strong>\u3002<\/p>\n

    \/**\r\n * Created by qibin on 2015\/11\/5.\r\n *\/<\/span>\r\npublic<\/span> class<\/span> MyAdapter<\/span> extends<\/span> RecyclerView<\/span>.Adapter<\/span><RecyclerView<\/span>.ViewHolder<\/span>> {<\/span>\r\n\r\n    public<\/span> static<\/span> final<\/span> int<\/span> TYPE_HEADER = 0<\/span>;\r\n    public<\/span> static<\/span> final<\/span> int<\/span> TYPE_NORMAL = 1<\/span>;\r\n\r\n    private<\/span> ArrayList<String> mDatas = new<\/span> ArrayList<>();\r\n\r\n    private<\/span> View mHeaderView;\r\n\r\n    private<\/span> OnItemClickListener mListener;\r\n\r\n    public<\/span> void<\/span> setOnItemClickListener<\/span>(OnItemClickListener li) {\r\n        mListener = li;\r\n    }\r\n\r\n    public<\/span> void<\/span> setHeaderView<\/span>(View headerView) {\r\n        mHeaderView = headerView;\r\n        notifyItemInserted(0<\/span>);\r\n    }\r\n\r\n    public<\/span> View getHeaderView<\/span>() {\r\n        return<\/span> mHeaderView;\r\n    }\r\n\r\n    public<\/span> void<\/span> addDatas<\/span>(ArrayList<String> datas) {\r\n        mDatas.addAll(datas);\r\n        notifyDataSetChanged();\r\n    }\r\n\r\n    @Override<\/span>\r\n    public<\/span> int<\/span> getItemViewType<\/span>(int<\/span> position) {\r\n        if<\/span>(mHeaderView == null<\/span>) return<\/span> TYPE_NORMAL;\r\n        if<\/span>(position == 0<\/span>) return<\/span> TYPE_HEADER;\r\n        return<\/span> TYPE_NORMAL;\r\n    }\r\n\r\n    @Override<\/span>\r\n    public<\/span> RecyclerView.ViewHolder onCreateViewHolder<\/span>(ViewGroup parent, int<\/span> viewType) {\r\n        if<\/span>(mHeaderView != null<\/span> && viewType == TYPE_HEADER) return<\/span> new<\/span> Holder(mHeaderView);\r\n        View layout = LayoutInflater.from(parent.getContext()).inflate(R.layout.item, parent, false<\/span>);\r\n        return<\/span> new<\/span> Holder(layout);\r\n    }\r\n\r\n    @Override<\/span>\r\n    public<\/span> void<\/span> onBindViewHolder<\/span>(RecyclerView.ViewHolder viewHolder, int<\/span> position) {\r\n        if<\/span>(getItemViewType(position) == TYPE_HEADER) return<\/span>;\r\n\r\n        final<\/span> int<\/span> pos = getRealPosition(viewHolder);\r\n        final<\/span> String data = mDatas.get(pos);\r\n        if<\/span>(viewHolder instanceof<\/span> Holder) {\r\n            ((Holder) viewHolder).text.setText(data);\r\n            if<\/span>(mListener == null<\/span>) return<\/span>;\r\n            viewHolder.itemView.setOnClickListener(new<\/span> View.OnClickListener() {\r\n                @Override<\/span>\r\n                public<\/span> void<\/span> onClick<\/span>(View v) {\r\n                    mListener.onItemClick(pos, data);\r\n                }\r\n            });\r\n        }\r\n    }\r\n\r\n    public<\/span> int<\/span> getRealPosition<\/span>(RecyclerView.ViewHolder holder) {\r\n        int<\/span> position = holder.getLayoutPosition();\r\n        return<\/span> mHeaderView == null<\/span> ? position : position - 1<\/span>;\r\n    }\r\n\r\n    @Override<\/span>\r\n    public<\/span> int<\/span> getItemCount<\/span>() {\r\n        return<\/span> mHeaderView == null<\/span> ? mDatas.size() : mDatas.size() + 1<\/span>;\r\n    }\r\n\r\n    class Holder extends RecyclerView.ViewHolder {\r\n\r\n        TextView text;\r\n\r\n        public<\/span> Holder<\/span>(View itemView) {\r\n            super<\/span>(itemView);\r\n            if<\/span>(itemView == mHeaderView) return<\/span>;\r\n            text = (TextView) itemView.findViewById(R.id.text);\r\n        }\r\n    }\r\n\r\n    interface OnItemClickListener {\r\n        void<\/span> onItemClick(int<\/span> position, String data);\r\n    }\r\n}<\/code><\/pre>\n
    \u8fd9\u91cc\u6211\u4eec\u91cd\u5199\u4e86getItemViewType<\/code>\u65b9\u6cd5\uff0c\u5e76\u6839\u636e\u4f4d\u7f6e\u6765\u8fd4\u56de\u4e0d\u540c\u7684type\uff0c\u8fd9\u4e2atype\u662f\u6211\u4eec\u9884\u5148\u5546\u5b9a\u597d\u7684\u5e38\u91cf\uff0c\u63a5\u5728onCreateViewHolder<\/code>\u65b9\u6cd5\u4e2d\u6765\u5224\u65aditemType\uff0c\u5982\u679c\u662fheader\uff0c\u5219\u8fd4\u56de\u6211\u4eec\u8bbe\u7f6e\u7684headerView\uff0c\u5426\u5219\u6b63\u5e38\u52a0\u8f7ditem\u5e03\u5c40\uff0c\u76f8\u4fe1\u5927\u5bb6\u5bf9\u4e8e\u4e0a\u9762\u7684\u4ee3\u7801\u4e0d\u4f1a\u6709\u4efb\u4f55\u7591\u95ee\uff0c\u63a5\u4e0b\u6765\u6211\u4eec\u5c31\u5728Activity\u4e2d\u7528\u4e00\u4e0b\u8bd5\u8bd5\u770b\uff0c<\/p>\n
    @Override<\/span>\r\nprotected<\/span> void<\/span> onCreate<\/span>(Bundle savedInstanceState) {\r\n    super<\/span>.onCreate(savedInstanceState);\r\n    setContentView(R.layout.activity_main);\r\n\r\n    mRecyclerView = (RecyclerView) findViewById(R.id.list);\r\n    mLayoutManager = new<\/span> LinearLayoutManager(this<\/span>, LinearLayoutManager.VERTICAL, false<\/span>);\r\n    mRecyclerView.setLayoutManager(mLayoutManager);\r\n    mRecyclerView.setItemAnimator(new<\/span> DefaultItemAnimator());\r\n\r\n    mAdapter = new<\/span> MyAdapter();\r\n    mRecyclerView.setAdapter(mAdapter);\r\n    mAdapter.addDatas(generateData());\r\n    setHeader(mRecyclerView);\r\n    mAdapter.setOnItemClickListener(new<\/span> MyAdapter.OnItemClickListener() {\r\n        @Override<\/span>\r\n        public<\/span> void<\/span> onItemClick<\/span>(int<\/span> position, String data) {\r\n            Toast.makeText(MainActivity.this<\/span>, data, Toast.LENGTH_SHORT).show();\r\n        }\r\n    });\r\n}\r\n\r\nprivate<\/span> void<\/span> setHeader<\/span>(RecyclerView view) {\r\n    View header = LayoutInflater.from(this<\/span>).inflate(R.layout.header, view, false<\/span>);\r\n    mAdapter.setHeaderView(header);\r\n}<\/code><\/pre>\n
    \u8fd9\u91ccLayoutManager<\/code>\u6211\u4eec\u4f7f\u7528\u4e86LinearLayoutManager<\/code>\uff0c\u5e76\u4e14\u7ed9Adapter<\/code>\u8bbe\u7f6e\u4e86\u4e00\u4e2aheader\uff0c\u8fd0\u884c\u4e00\u4e0b
    \n\u770b\u770b\u6548\u679c\uff1a<\/p>\n
    \u6069\uff0c\u8fd8\u4e0d\u9519\uff0citem\u7684\u70b9\u51fb\u4e8b\u4ef6\u4e5f\u5f88\u5b8c\u7f8e\uff0c\u90a3\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u5c06LayoutManager<\/code>\u6362\u6210GridLayoutManager<\/code>\u770b\u770b\u548b\u6837\u3002<\/p>\n
    <\/a>\u4e3aGridLayoutManager\u6dfb\u52a0header<\/h2>\n
    \/\/  mLayoutManager = new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false);<\/span>\r\nmLayoutManager = new<\/span> GridLayoutManager(this<\/span>, 2<\/span>);<\/code><\/pre>\n
    \u54ce\u54df\uff0c\u6211\u7684\u5c0f\u5fc3\u810f\u554a\uff0c\u5feb\u53d7\u4e0d\u4e86\u4e86\uff0c\u8fd9\u662f\u4ec0\u4e48\u73a9\u610f\uff0c\u6211\u4eec\u7684header\u7adf\u7136\u4f5c\u4e3a\u4e00\u4e2acell\u51fa\u73b0\u5728\u4e86\u754c\u9762\u4e0a\uff0c\u8fd9\u5b8c\u5168\u4e0d\u662f\u6211\u4eec\u60f3\u8981\u7684\u6548\u679c\u554a\uff01 \u51b7\u9759\u4e0b\u6765\u60f3\u60f3\uff0c\u80af\u5b9a\u4f1a\u6709\u89e3\u51b3\u65b9\u6cd5\u7684\u5427\u3002\u8fd9\u65f6\u5019\u6211\u4eec\u5c31\u8be5\u5f15\u5165\u4e00\u4e2a\u4e0d\u592a\u5e38\u7528\u7684\u65b9\u6cd5\u4e86\uff1a<\/p>\n
    gridManager.setSpanSizeLookup(new<\/span> GridLayoutManager.SpanSizeLookup() {\r\n    @Override<\/span>\r\n    public<\/span> int<\/span> getSpanSize<\/span>(int<\/span> position) {\r\n        return<\/span> getItemViewType(position) == TYPE_HEADER\r\n                ? gridManager.getSpanCount() : 1<\/span>;\r\n    }\r\n});<\/code><\/pre>\n
    \u6211\u4eec\u89e3\u91ca\u4e00\u4e0b\u8fd9\u6bb5\u4ee3\u7801\uff0c\u9996\u5148\u6211\u4eec\u8bbe\u7f6e\u4e86\u4e00\u4e2aSpanSizeLookup<\/code>\uff0c\u8fd9\u4e2a\u7c7b\u662f\u4e00\u4e2a\u62bd\u8c61\u7c7b\uff0c\u800c\u4e14\u4ec5\u6709\u4e00\u4e2a\u62bd\u8c61\u65b9\u6cd5getSpanSize<\/code>\uff0c\u8fd9\u4e2a\u65b9\u6cd5\u7684\u8fd4\u56de\u503c\u51b3\u5b9a\u4e86\u6211\u4eec\u6bcf\u4e2aposition\u4e0a\u7684item\u5360\u636e\u7684\u5355\u5143\u683c\u4e2a\u6570\uff0c\u800c\u6211\u4eec\u8fd9\u6bb5\u4ee3\u7801\u7efc\u5408\u4e0a\u9762\u4e3aGridLayoutManager<\/code>\u8bbe\u7f6e\u7684\u6bcf\u884c\u7684\u4e2a\u6570\u6765\u89e3\u91ca\u7684\u8bdd\uff0c
    \n\u5c31\u662f\u5f53\u524d\u4f4d\u7f6e\u662fheader\u7684\u4f4d\u7f6e\uff0c\u90a3\u4e48\u8be5item\u5360\u636e2\u4e2a\u5355\u5143\u683c\uff0c\u6b63\u5e38\u60c5\u51b5\u4e0b\u5360\u636e1\u4e2a\u5355\u5143\u683c<\/strong>\u3002\u90a3\u8fd9\u6bb5\u4ee3\u7801\u653e\u54ea\u5462\uff1f \u4e3a\u4e86\u4ee5\u540e\u7684\u5c01\u88c5\uff0c\u6211\u4eec\u8fd8\u662f\u5728Adapter<\/code>\u4e2d\u627e\u65b9\u6cd5\u653e\u5427\u3002
    \n\u6211\u4eec\u5728Adapter<\/code>\u4e2d\u518d\u91cd\u5199\u4e00\u4e2a\u65b9\u6cd5onAttachedToRecyclerView<\/code>\uff0c<\/p>\n
    @Override<\/span>\r\npublic<\/span> void<\/span> onAttachedToRecyclerView<\/span>(RecyclerView recyclerView) {\r\n    super<\/span>.onAttachedToRecyclerView(recyclerView);\r\n    RecyclerView.LayoutManager manager = recyclerView.getLayoutManager();\r\n    if<\/span>(manager instanceof<\/span> GridLayoutManager) {\r\n        final<\/span> GridLayoutManager gridManager = ((GridLayoutManager) manager);\r\n        gridManager.setSpanSizeLookup(new<\/span> GridLayoutManager.SpanSizeLookup() {\r\n            @Override<\/span>\r\n            public<\/span> int<\/span> getSpanSize<\/span>(int<\/span> position) {\r\n                return<\/span> getItemViewType(position) == TYPE_HEADER\r\n                        ? gridManager.getSpanCount() : 1<\/span>;\r\n            }\r\n        });\r\n    }\r\n}<\/code><\/pre>\n
    \u8fd9\u4e2a\u65f6\u5019\u6211\u4eec\u518d\u6765\u770b\u4e00\u4e0b\u6548\u679c\uff0c<\/p>\n
    \"\"<\/p>\n
    \u6069\uff0c\u8fd9\u6b21\u8fbe\u5230\u6211\u4eec\u7684\u8981\u6c42\u4e86\uff0c\u4e0d\u8fc7\u5bf9\u4e8eStaggeredGridLayoutManager<\/code>\u6211\u4eec\u8fd8\u6ca1\u505a\u5904\u7406\uff0c\u800c\u4e14\u6211\u4eec\u8fd8\u53d1\u73b0StaggeredGridLayoutManager<\/code>\u4e2d\u5e76\u6ca1\u6709\u50cfGridLayoutManager<\/code>\u4e2d\u8fd9\u6837\u7684\u65b9\u6cd5\uff0c\u6211\u4eec\u8fd8\u9700\u8981\u5355\u72ec\u4e3aStaggeredGridLayoutManager<\/code>\u5355\u72ec\u5904\u7406\u4e00\u4e0b\u3002<\/p>\n
    <\/a>\u4e3aStaggeredGridLayoutManager\u6dfb\u52a0header<\/h2>\n
    \u6211\u4eec\u7ee7\u7eed\u91cd\u5199Adapter<\/code>\u4e2d\u53e6\u5916\u4e00\u4e2a\u65b9\u6cd5\u3002<\/p>\n
    @Override<\/span>\r\npublic<\/span> void<\/span> onViewAttachedToWindow<\/span>(RecyclerView.ViewHolder holder) {\r\n    super<\/span>.onViewAttachedToWindow(holder);\r\n    ViewGroup.LayoutParams lp = holder.itemView.getLayoutParams();\r\n    if<\/span>(lp != null<\/span>\r\n            && lp instanceof<\/span> StaggeredGridLayoutManager.LayoutParams) {\r\n            StaggeredGridLayoutManager.LayoutParams p = (StaggeredGridLayoutManager.LayoutParams) lp;\r\n            p.setFullSpan(holder.getLayoutPosition() == 0<\/span>);\r\n    }\r\n}<\/code><\/pre>\n
    \u8fd9\u91cc\u7684\u5904\u7406\u65b9\u5f0f\u662f\u7528\u901a\u8fc7LayoutParams<\/code>\uff0c\u800c\u4e14\u8fd9\u91cc\u66f4\u7b80\u5355\uff0cStaggeredGridLayoutManager.LayoutParams<\/code>\u4e3a\u6211\u4eec\u63d0\u4f9b\u4e86\u4e00\u4e2asetFullSpan<\/code>\u65b9\u6cd5\u6765\u8bbe\u7f6e\u5360\u9886\u5168\u90e8\u7a7a\u95f4\uff0c\u597d\u5f00\u5fc3\uff0c\u770b\u4e00\u4e0bStaggeredGridLayoutManager<\/code>\u7684\u6548\u679c\uff0c<\/p>\n
    \"\"<\/p>\n
    \u554a\uff0c \u600e\u4e48\u548c\u4e0a\u9762\u7684\u6548\u679c\u4e00\u6837\uff1f \u5f88\u7b80\u5355\u561b\uff0c\u6211\u4eec\u7684item\u90fd\u662f\u7b49\u9ad8\u7684\u3002<\/p>\n
    <\/a>\u5904\u7406\u5206\u9694\u7b26<\/h2>\n
    \u8fd9\u662f\u6211\u4eec\u5f00\u5f00\u5fc3\u5fc3\u7684\u7ee7\u7eed\u5199\u4ee3\u7801\uff0c\u5e76\u4e14\u4e3a\u6211\u4eec\u7684item\u6dfb\u52a0\u4e86\u5206\u9694\u7b26\uff0c\u5206\u9694\u7b26\u6211\u8fd8\u662f\u7528\u7684\u7fd4\u54e5\u5199\u7684\u90a3\u4e2a\uff0c\u6bd5\u7adf\u7fd4\u54e5\u5199\u7684\u592a\u597d\u4e86\uff0c\u800c\u4e14\u6211\u4eec\u6ca1\u6709\u5fc5\u8981\u91cd\u590d\u9020\u8f6e\u5b50\uff0c\u4e0d\u8fc7\u8fd9\u65f6\u5019\u95ee\u9898\u51fa\u73b0\u4e86\uff0c\u76f8\u4fe1\u4f60\u4e5f\u80af\u5b9a\u80fd\u731c\u5230\u5e94\u8be5\u4f1a\u51fa\u73b0\u95ee\u9898\u4e86\uff0c\u56e0\u4e3a\u4e0d\u7ba1\u6211\u4eec\u600e\u4e48\u5904\u7406\uff0cheader\u5bf9\u4e8eRecyclerView<\/code>\u6765\u8bf4\u8fd8\u662f\u4e00\u4e2a\u666e\u666e\u901a\u901a\u7684item\uff0c\u8fd9\u65f6\u5019\u6211\u4eec\u6dfb\u52a0\u5206\u5272\u7ebf\uff0c\u80af\u5b9a\u4e5f\u4f1a\u5bf9header\u4ea7\u751f\u5f71\u54cd\uff0c\u90a3\u4e0b\u9762\uff0c\u6211\u4eec\u518d\u6765\u5bf9\u7fd4\u54e5\u7684\u5206\u5272\u7ebf\u6539\u9020\u4e00\u4e0b\u5427\u3002<\/p>\n
    public<\/span> class<\/span> GridItemDecoration<\/span> extends<\/span> RecyclerView<\/span>.ItemDecoration<\/span> {<\/span>\r\n    private<\/span> static<\/span> final<\/span> int<\/span>[] ATTRS = new<\/span> int<\/span>[]{android.R.attr.listDivider};\r\n    private<\/span> Drawable mDivider;\r\n    private<\/span> boolean<\/span> hasHeader;\r\n\r\n    public<\/span> GridItemDecoration<\/span>(Context context) {\r\n        final<\/span> TypedArray a = context.obtainStyledAttributes(ATTRS);\r\n        mDivider = a.getDrawable(0<\/span>);\r\n        a.recycle();\r\n    }\r\n\r\n    public<\/span> GridItemDecoration<\/span>(Context context, boolean<\/span> header) {\r\n        this<\/span>(context);\r\n        hasHeader = header;\r\n    }\r\n\r\n    ...\r\n\r\n    @Override<\/span>\r\n    public<\/span> void<\/span> getItemOffsets<\/span>(Rect outRect, View view,\r\n                               RecyclerView parent, RecyclerView.State state) {\r\n        int<\/span> position = parent.getChildAdapterPosition(view);\r\n        int<\/span> spanCount = getSpanCount(parent);\r\n        int<\/span> childCount = parent.getAdapter().getItemCount();\r\n        int<\/span> pos = position;\r\n\r\n        if<\/span>(hasHeader) {\r\n            if<\/span>(position == 0<\/span>) {\r\n                outRect.set(0<\/span>, 0<\/span>, 0<\/span>, mDivider.getIntrinsicHeight());\r\n                return<\/span>;\r\n            } else<\/span> {\r\n                pos = position - 1<\/span>;\r\n            }\r\n        }\r\n\r\n        if<\/span> (isLastColum(parent, pos, spanCount, childCount)) {\r\n            outRect.set(0<\/span>, 0<\/span>, mDivider.getIntrinsicWidth(), mDivider.getIntrinsicHeight());\r\n        } else<\/span> {\r\n            outRect.set(0<\/span>, 0<\/span>, mDivider.getIntrinsicWidth(),\r\n                    mDivider.getIntrinsicHeight());\r\n        }\r\n    }\r\n}<\/code><\/pre>\n
    \u6539\u9020\u7684\u5730\u65b9\u662f\u83b7\u53d6\u504f\u79fb\u91cf\u7684\u65b9\u6cd5\u6211\u4eec\u6362\u4e86\u4e00\u4e2a\uff0c\u56e0\u4e3a\u539f\u6765\u7684\u90a3\u4e2a\u5df2\u7ecf\u8fc7\u65f6\u4e86\uff0c\u800c\u4e14\uff0c\u8fd9\u91cc\u6211\u4eec\u8fd8\u52a0\u4e86\u4e00\u4e2aboolean\u7c7b\u578b\u7684hasHeader<\/code>\u53d8\u91cf\u6765\u8868\u793a\u662f\u4e0d\u662f\u6709header\uff0c\u5982\u679chasHeader\u5e76\u4e14position\u4e3a0\uff0c\u90a3\u4e48\u6211\u4eec\u4ec5\u4ec5\u7ed8\u5236\u5e95\u90e8\u7684\u5206\u5272\u7ebf\uff0c\u5176\u4ed6\u7684\u5730\u65b9\u4e0d\u7ed8\u5236\uff0c\u5728\u6709header\u7684\u60c5\u51b5\u4e0b\uff0c\u6211\u4eec\u8fd8\u9700\u8981\u5c06position\u51cf1\uff0c\u56e0\u4e3a\u6211\u4eec\u8ba4\u4e3a\u7684\u7b2c1\u4e2aitem\u5176\u5b9e\u662f\u7b2c2\u4e2a\u3002\u8fd9\u4e2a\u65f6\u5019\u6211\u4eec\u518d\u6765\u770b\u770b\u6709\u5206\u5272\u7ebf\u7684\u6548\u679c\u3002<\/p>\n
    \"\"<\/p>\n
    \u770b\u6765\u6211\u4eec\u7684\u60f3\u6cd5\u662f\u5bf9\u7684\uff0cheader\u90e8\u5206\u9664\u4e86\u5e95\u90e8\u6709\u4e00\u4e2a\u5206\u5272\u7ebf\u5916\uff0c\u5e76\u6ca1\u6709\u5176\u4ed6\u7684\u5206\u5272\u7ebf\uff0c\u8fd9\u4e5f\u5b8c\u5168\u7b26\u5408\u6211\u4eec\u7684\u9700\u6c42\u3002<\/p>\n
    <\/a>\u5c01\u88c5<\/h2>\n
    \u8fd9\u4e0b\u597d\u4e86\uff0c\u57fa\u672c\u4e0a\u5b8c\u7f8e\u7684\u5904\u7406\u597d\u4e86\uff0c\u53ef\u662f\u96be\u9053\u6211\u4eec\u5bf9\u4e8e\u4e0d\u540c\u7684Adapter<\/code>\u90fd\u9700\u8981\u5199\u90a3\u4e48\u591a\u4ee3\u7801\u5417\uff1f \u5bf9\u4e8e\u4e00\u4e2a\u61d2\u7a0b\u5e8f\u5458\u6765\u8bf4\uff0c\u8fd9\u80af\u5b9a\u662f\u4e00\u4e2a\u53ef\u6015\u7684\u4e8b\u60c5\uff0c\u6240\u4ee5\uff0c\u6211\u4eec\u8fd8\u9700\u8981\u5bf9\u6211\u4eec\u7684Adapter<\/code>\u8fdb\u884c\u5c01\u88c5\uff0c\u76ee\u7684\u5c31\u662f\u53ef\u4ee5\u8f7b\u8f7b\u677e\u677e\u7684\u5199\u4ee3\u7801\uff0c<\/p>\n
    \/**\r\n * Created by qibin on 2015\/11\/5.\r\n *\/<\/span>\r\npublic<\/span> abstract<\/span> class<\/span> BaseRecyclerAdapter<\/span><T<\/span>> extends<\/span> RecyclerView<\/span>.Adapter<\/span><RecyclerView<\/span>.ViewHolder<\/span>> {<\/span>\r\n\r\n    public<\/span> static<\/span> final<\/span> int<\/span> TYPE_HEADER = 0<\/span>;\r\n    public<\/span> static<\/span> final<\/span> int<\/span> TYPE_NORMAL = 1<\/span>;\r\n\r\n    private<\/span> ArrayList<T> mDatas = new<\/span> ArrayList<>();\r\n\r\n    private<\/span> View mHeaderView;\r\n\r\n    private<\/span> OnItemClickListener mListener;\r\n\r\n    public<\/span> void<\/span> setOnItemClickListener<\/span>(OnItemClickListener li) {\r\n        mListener = li;\r\n    }\r\n\r\n    public<\/span> void<\/span> setHeaderView<\/span>(View headerView) {\r\n        mHeaderView = headerView;\r\n        notifyItemInserted(0<\/span>);\r\n    }\r\n\r\n    public<\/span> View getHeaderView<\/span>() {\r\n        return<\/span> mHeaderView;\r\n    }\r\n\r\n    public<\/span> void<\/span> addDatas<\/span>(ArrayList<T> datas) {\r\n        mDatas.addAll(datas);\r\n        notifyDataSetChanged();\r\n    }\r\n\r\n    @Override<\/span>\r\n    public<\/span> int<\/span> getItemViewType<\/span>(int<\/span> position) {\r\n        if<\/span>(mHeaderView == null<\/span>) return<\/span> TYPE_NORMAL;\r\n        if<\/span>(position == 0<\/span>) return<\/span> TYPE_HEADER;\r\n        return<\/span> TYPE_NORMAL;\r\n    }\r\n\r\n    @Override<\/span>\r\n    public<\/span> RecyclerView.ViewHolder onCreateViewHolder<\/span>(ViewGroup parent, final<\/span> int<\/span> viewType) {\r\n        if<\/span>(mHeaderView != null<\/span> && viewType == TYPE_HEADER) return<\/span> new<\/span> Holder(mHeaderView);\r\n        return<\/span> onCreate(parent, viewType);\r\n    }\r\n\r\n\r\n    @Override<\/span>\r\n    public<\/span> void<\/span> onBindViewHolder<\/span>(RecyclerView.ViewHolder viewHolder, int<\/span> position) {\r\n        if<\/span>(getItemViewType(position) == TYPE_HEADER) return<\/span>;\r\n\r\n        final<\/span> int<\/span> pos = getRealPosition(viewHolder);\r\n        final<\/span> T data = mDatas.get(pos);\r\n        onBind(viewHolder, pos, data);\r\n\r\n        if<\/span>(mListener != null<\/span>) {\r\n            viewHolder.itemView.setOnClickListener(new<\/span> View.OnClickListener() {\r\n                @Override<\/span>\r\n                public<\/span> void<\/span> onClick<\/span>(View v) {\r\n                    mListener.onItemClick(pos, data);\r\n                }\r\n            });\r\n        }\r\n    }\r\n\r\n    @Override<\/span>\r\n    public<\/span> void<\/span> onAttachedToRecyclerView<\/span>(RecyclerView recyclerView) {\r\n        super<\/span>.onAttachedToRecyclerView(recyclerView);\r\n\r\n        RecyclerView.LayoutManager manager = recyclerView.getLayoutManager();\r\n        if<\/span>(manager instanceof<\/span> GridLayoutManager) {\r\n            final<\/span> GridLayoutManager gridManager = ((GridLayoutManager) manager);\r\n            gridManager.setSpanSizeLookup(new<\/span> GridLayoutManager.SpanSizeLookup() {\r\n                @Override<\/span>\r\n                public<\/span> int<\/span> getSpanSize<\/span>(int<\/span> position) {\r\n                    return<\/span> getItemViewType(position) == TYPE_HEADER\r\n                            ? gridManager.getSpanCount() : 1<\/span>;\r\n                }\r\n            });\r\n        }\r\n    }\r\n\r\n    @Override<\/span>\r\n    public<\/span> void<\/span> onViewAttachedToWindow<\/span>(RecyclerView.ViewHolder holder) {\r\n        super<\/span>.onViewAttachedToWindow(holder);\r\n        ViewGroup.LayoutParams lp = holder.itemView.getLayoutParams();\r\n        if<\/span>(lp != null<\/span>\r\n                && lp instanceof<\/span> StaggeredGridLayoutManager.LayoutParams) {\r\n                        StaggeredGridLayoutManager.LayoutParams p = (StaggeredGridLayoutManager.LayoutParams) lp;\r\n            p.setFullSpan(holder.getLayoutPosition() == 0<\/span>);\r\n        }\r\n    }\r\n\r\n    public<\/span> int<\/span> getRealPosition<\/span>(RecyclerView.ViewHolder holder) {\r\n        int<\/span> position = holder.getLayoutPosition();\r\n        return<\/span> mHeaderView == null<\/span> ? position : position - 1<\/span>;\r\n    }\r\n\r\n    @Override<\/span>\r\n    public<\/span> int<\/span> getItemCount<\/span>() {\r\n        return<\/span> mHeaderView == null<\/span> ? mDatas.size() : mDatas.size() + 1<\/span>;\r\n    }\r\n\r\n    public<\/span> abstract<\/span> RecyclerView.ViewHolder onCreate<\/span>(ViewGroup parent, final<\/span> int<\/span> viewType);\r\n    public<\/span> abstract<\/span> void<\/span> onBind<\/span>(RecyclerView.ViewHolder viewHolder, int<\/span> RealPosition, T data);\r\n\r\n    public<\/span> class<\/span> Holder<\/span> extends<\/span> RecyclerView<\/span>.ViewHolder<\/span> {<\/span>\r\n        public<\/span> Holder<\/span>(View itemView) {\r\n            super<\/span>(itemView);\r\n        }\r\n    }\r\n\r\n    public<\/span> interface<\/span> OnItemClickListener<\/span><T<\/span>> {<\/span>\r\n        void<\/span> onItemClick(int<\/span> position, T data);\r\n    }\r\n}<\/code><\/pre>\n
    \u6211\u4eec\u5c06BaseRecyclerAdapter<\/code>\u62bd\u8c61\u8d77\u6765\uff0c\u5e76\u4e14\u63d0\u4f9b\u4e24\u4e2a\u62bd\u8c61\u65b9\u6cd5onCreate<\/code>\u548conBind<\/code>\u7528\u6765\u521b\u5efaholder\u548c\u7ed1\u5b9a\u6570\u636e\uff0c\u800c\u5bf9\u4e8eheader\u505a\u7684\u4e00\u7cfb\u5217\u5de5\u4f5c\uff0c\u6211\u4eec\u90fd\u653e\u5230\u4e86BaseRecyclerAdapter<\/code>\u4e2d\uff0c\u800c\u7ee7\u627fBaseRecyclerAdapter<\/code>\u540e\uff0c\u6211\u4eec\u4ec5\u4ec5\u5173\u5fc3\u6211\u4eec\u7684holder\u600e\u4e48\u521b\u5efa\u548c\u6570\u636e\u600e\u4e48\u7ed1\u5b9a\u5c31ok\u3002\u4f8b\u5982\u4e0b\u9762\u4ee3\u7801\uff1a<\/p>\n
    \/**\r\n * Created by qibin on 2015\/11\/7.\r\n *\/<\/span>\r\npublic<\/span> class<\/span> MyAdapter<\/span> extends<\/span> BaseRecyclerAdapter<\/span><String<\/span>> {<\/span>\r\n\r\n    @Override<\/span>\r\n    public<\/span> RecyclerView.ViewHolder onCreate<\/span>(ViewGroup parent, int<\/span> viewType) {\r\n        View layout = LayoutInflater.from(parent.getContext()).inflate(R.layout.item, parent, false<\/span>);\r\n        return<\/span> new<\/span> MyHolder(layout);\r\n    }\r\n\r\n    @Override<\/span>\r\n    public<\/span> void<\/span> onBind<\/span>(RecyclerView.ViewHolder viewHolder, int<\/span> RealPosition, String data) {\r\n        if<\/span>(viewHolder instanceof<\/span> MyHolder) {\r\n            ((MyHolder) viewHolder).text.setText(data);\r\n        }\r\n    }\r\n\r\n    class MyHolder extends BaseRecyclerAdapter.Holder {\r\n        TextView text;\r\n        public<\/span> MyHolder<\/span>(View itemView) {\r\n            super<\/span>(itemView);\r\n            text = (TextView) itemView.findViewById(R.id.text);\r\n        }\r\n    }\r\n}<\/code><\/pre>\n
    \u8fd9\u6837\u6211\u4eec\u518d\u7528\u8d77\u6765\u5c31\u7b80\u5355\u591a\u4e86\uff0c\u5bf9\u4e8e\u8fd9\u6837\u7684\u5c01\u88c5\uff0c\u6211\u4eec\u8fd8\u7b97\u6ee1\u610f\uff0c\u518d\u505a\u5b8c\u6dfb\u52a0header\u540e\uff0c\u76f8\u4fe1\u5927\u5bb6\u5bf9\u4e8efooter\u4e5f\u6709\u60f3\u6cd5\u4e86\uff0c\u6709\u60f3\u6cd5\u5c31\u5b9e\u73b0\u5b83\u5427\uff0c\u6269\u5c55\u4e00\u4e0bBaseRecyclerAdapter<\/code>\u5c31ok\u5566\u3002<\/p>\n
    \u597d\u4e86\uff0c\u8fd9\u7bc7\u535a\u5ba2\u5c31\u5230\u8fd9\u91cc\u5427\uff0c\u6700\u540e\u662f\u672c\u6587\u4ee3\u7801\u7684\u4e0b\u8f7d\u3002<\/p>\n
    \u539f\u6587\u51fa\u5904:RecyclerView\u6dfb\u52a0Header\u7684\u6b63\u786e\u65b9\u5f0f<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
    \u770b\u4e86\u4e00\u4e0b\u535a\u5ba2\u76ee\u5f55\uff0c\u5df2\u7ecf\u6709\u597d\u51e0\u7bc7\u535a\u5ba2\u662f\u5173\u4e8eRecyclerView\u7684\uff0c\u4e0d\u8fc7\u5bf9\u4e8e\u8fd9\u4e48\u4e00\u6b3e\u5f3a\u5927\u7684\u63a7\u4ef6\uff0c\u6211\u8fd8\u662f\u8981\u518d\u5199\u4e00 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[3],"tags":[75],"_links":{"self":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts\/1193"}],"collection":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1193"}],"version-history":[{"count":6,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts\/1193\/revisions"}],"predecessor-version":[{"id":2531,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts\/1193\/revisions\/2531"}],"wp:attachment":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1193"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1193"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1193"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
    \u4ee3\u7801\u4e0b\u8f7d\uff0c\u6233\u8fd9\u91cc<\/a><\/p>\n
    \"\u256c\u0432\u2568\u253c\u255c\u256a\u2550\u255d_20200331114941\"<\/a><\/p>\n
    \"\u256c\u0432\u2568\u253c\u255c\u256a\u2550\u255d_20200331114905\"<\/a><\/p>\n