android RecyclerView

mRecyclerView = findView(R.id.id_recyclerview);
//设置布局管理器
mRecyclerView.setLayoutManager(layout);
//设置adapter
mRecyclerView.setAdapter(adapter)
//设置Item增加、移除动画
mRecyclerView.setItemAnimator(new DefaultItemAnimator());
//添加分割线
mRecyclerView.addItemDecoration(new DividerItemDecoration(
                getActivity(), DividerItemDecoration.HORIZONTAL_LIST));

Adapter

• OnCreateViewHolder(),需要创建并返回一个ViewHolder对象,inflate view,findViewById。
• onBindViewHolder(),绑定控件数据,ViewHolder+Position。
• getItemCount(),返回数据项个数
• ViewHolder

class MyAdapter extends RecyclerView.Adapter<MyAdapter.MyViewHolder>
    {

        @Override
        public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType)
        {
            MyViewHolder holder = new MyViewHolder(LayoutInflater.from(
                    HomeActivity.this).inflate(R.layout.item_home, parent,
                    false));
            return holder;
        }

        @Override
        public void onBindViewHolder(MyViewHolder holder, int position)
        {
            holder.tv.setText(mDatas.get(position));
        }

        @Override
        public int getItemCount()
        {
            return mDatas.size();
        }

        class MyViewHolder extends ViewHolder
        {

            TextView tv;

            public MyViewHolder(View view)
            {
                super(view);
                tv = (TextView) view.findViewById(R.id.id_num);
            }
        }
    }

LayoutManager

• LinearLayoutManager 线行管理器，支持横向、纵向，类似ListView。
• GridLayoutManager 网格布局管理器，类似GridView。
• StaggeredGridLayoutManager 瀑布流式布局。

ItemDecoration

• getItemOffsets(Rect outRect, View view, RecyclerView parent, RecyclerView.State state)

  为outRect设置的4个方向的值,作为decoration,计入item的padding

• onDraw(Canvas c, RecyclerView parent, RecyclerView.State state)
• onDrawOver(Canvas c, RecyclerView parent, RecyclerView.State state)

ItemAnimator

• 更新数据使用notifyItemInserted(position)与notifyItemRemoved(position)

Click and LongClick