androidRecyclerView

引用

在项目的build.gradle添加依赖

compile 'com.android.support:recyclerview-v7:23.4.0'

RecyclierView使用的基本方法

recyclerView.setAdapter(); 添加适配器(必须)

recyclerView.setLayoutManager(); 选择一种布局(必须)

recyclerAdapter.setHeaderView(); 添加头布局

recyclerAdapter.setFooterView(); 添加底部布局

recyclerView.setItemAnimator(new DefaultItemAnimator()); 添加默认动画

recyclerView.addItemDecoration(); 添加分割线

Layout Manager布局管理器

1.三种布局管理器：

new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false)以垂直或者水平列表方式展示Item，第三个参数是否颠倒数据显示

new GridLayoutManager(this,4) 以网格方式展示Item，第二个参数代表列数

new StaggeredGridLayoutManager(4, StaggeredGridLayoutManager.HORIZONTAL)以瀑布流方式展示Item，第一个参数代表列数

2.常用方法

canScrollHorizontally();//能否横向滚动canScrollVertically();//能否纵向滚动scrollToPosition(int position);//滚动到指定位置setOrientation(int orientation);//设置滚动的方向getOrientation();//获取滚动方向findViewByPosition(int position);//获取指定位置的Item ViewfindFirstCompletelyVisibleItemPosition();//获取第一个完全可见的Item位置findFirstVisibleItemPosition();//获取第一个可见Item的位置findLastCompletelyVisibleItemPosition();//获取最后一个完全可见的Item位置findLastVisibleItemPosition();//获取最后一个可见Item的位置

Adapter适配器模板

RecyclerView必须自定义适配器，并且自己创建事件监听，布局和数据的绑定顺序，每个Item都会执行一遍：getIItemViewType(绑定类型) > onCreateViewHolder(选择布局类型) > onBindViewHolder(绑定数据)

notifyItemInserted(position);插入一个item

notifyItemRemoved(position); 移除一个item

notifyItemChanged(position) 刷新item

public class DataRecyclerAdapter extends RecyclerView.Adapter{    private List list;    private Context context;    private List mHeights;    private static int TYPE_TITLE=0;    private static int TYPE_FOOTER=1;    private static int TYPE_CONTENT =2;    private View mHeaderView;    private View mFooterView;    public DataRecyclerAdapter(Context context, List list) {        this.list=list;        mHeights = new ArrayList<>();        this.context=context;    }    //根据不同的类型适应不用的布局    @Override    public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {        if(mHeaderView != null && viewType == TYPE_TITLE) {            return new MyViewHolder(mHeaderView);        }        if(mFooterView != null && viewType == TYPE_FOOTER) {            return new MyViewHolder(mFooterView);        }        return new MyViewHolder(LayoutInflater.from(context).inflate(R.layout.options_item3,parent,false));    }    //给item分布不同的类型    @Override    public int getItemViewType(int position) {        if (position == 0){            return TYPE_TITLE;         }else if(position==list.size()){            return TYPE_FOOTER;        }else{            return TYPE_CONTENT;        }    }    public View getHeaderView() {        return mHeaderView;    }    //添加自定义的头部    public void setHeaderView(View headerView) {        mHeaderView = headerView;        notifyItemInserted(0);    }    public View getFooterView() {        return mFooterView;    }    //添加自定义底部    public void setFooterView(View footerView) {        mFooterView = footerView;        notifyItemInserted(list.size()+1);    }    //主体布局    @Override    public void onBindViewHolder(final MyViewHolder holder, int position) {        if(getItemViewType(position) != TYPE_CONTENT) {            return;        }            holder.textView.setText(list.get(position-1));        if (mOnItemClickLitener != null){            holder.itemView.setOnClickListener(new View.OnClickListener(){                @Override                public void onClick(View v){                    int pos = holder.getLayoutPosition();                    mOnItemClickLitener.onItemClick(holder.itemView, pos);                }            });            holder.itemView.setOnLongClickListener(new View.OnLongClickListener(){                @Override                public boolean onLongClick(View v){                    int pos = holder.getLayoutPosition();                    mOnItemClickLitener.onItemLongClick(holder.itemView, pos);                    return true;                }            });        }    }    //获取item总数    @Override    public int getItemCount() {         if(mFooterView !=null){            return list.size()+1;        }else {            return list.size();        }    }    //监听器接口    public interface OnItemClickLitener{        void onItemClick(View view, int position);        void onItemLongClick(View view , int position);    }    private OnItemClickLitener mOnItemClickLitener;    public void setOnMyItemClickLitener(OnItemClickLitener mOnItemClickLitener) {        this.mOnItemClickLitener = mOnItemClickLitener;    }   //头和底部的布局    class MyViewHolder extends RecyclerView.ViewHolder {        private TextView textView;        MyViewHolder(View itemView) {            super(itemView);            if (itemView == mHeaderView||itemView == mFooterView){                return;            }            textView= (TextView) itemView.findViewById(R.id.options_tv);            textView.setText("UUU");        }    }    //模拟新增的数据    public void addData(int position) {        list.add(position, "Insert 数据");        notifyItemInserted(position+1);        Toast.makeText(context,""+list.size(),Toast.LENGTH_SHORT).show();    }    //移除一个布局    public void removeData(int position) {        list.remove(position);        notifyItemRemoved(position);    }

实例

private void initDataRecyclerAdapter(){    recyclerAdapter=new DataRecyclerAdapter(this,mData);    //布局管理器    recyclerView.setLayoutManager( new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false));    //分割线    recyclerView.addItemDecoration(new DividerItemDecoration(this,            DividerItemDecoration.HORIZONTAL));    //使用默认动画    recyclerView.setItemAnimator(new DefaultItemAnimator());    //不使用默认的布局类型，添加自定义头部布局    recyclerAdapter.setHeaderView(LayoutInflater.from(this).inflate(R.layout.options_title, recyclerView, false));    //不使用默认的布局类型，添加自定义底部布局    LayoutInflater inflater= LayoutInflater.from(this);    View footerView = inflater.inflate(R.layout.options_footer, null);    recyclerAdapter.setFooterView(footerView);    //底部布局事件，增加一个item    footerView.setOnClickListener(new View.OnClickListener() {        @Override        public void onClick(View view) {            Toast.makeText(MainActivity.this,"展开",Toast.LENGTH_SHORT).show();            recyclerAdapter.addData(mData.size());        }    });    recyclerView.setAdapter(recyclerAdapter);    recyclerAdapter.setOnMyItemClickLitener(new DataRecyclerAdapter.OnItemClickLitener() {        //item的点击事件，移除一个item        @Override        public void onItemClick(View view, int position) {            recyclerAdapter.removeData(position);            Toast.makeText(MainActivity.this,""+mData.size(),Toast.LENGTH_SHORT).show();        }        //item的长按事件，显示item下标        @Override        public void onItemLongClick(View view, int position) {            Toast.makeText(MainActivity.this,"第"+position+"个",Toast.LENGTH_SHORT).show();        }    });}//模拟数据源private void addData(){    mData= new ArrayList<>();    for (int i=1;i<20;i++) {        mData.add("数据"+i+"个");    }}