public class MainActivity extends AppCompatActivity {
    private RecyclerView mList;//成员变量，全局都能操作
    private List<ItemBean> mData;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //找到控件
        mList = (RecyclerView) this.findViewById(R.id.parent);
        //准备数据
        initData();
    }
    //这个方法用于模拟数据
    private void initData() {
        //List<DataBea>---->Adapter---->setAdapter---->显示数据
        //创建数据集合
        mData = new ArrayList<>();

        //创建模拟数据
        for(int i=0;i< Datas.icons.length;i++){
            //创建数据对象
            ItemBean data=new ItemBean();
            data.icon=Datas.icons[i];
            data.title="我是第"+i+"个条目";
            //添加到集合里头
            mData.add(data);
        }
        //RecycleView需要设置样式1就是布局管理器
        LinearLayoutManager layoutManager=new LinearLayoutManager(this);
        mList.setLayoutManager(layoutManager);

        //创建适配器
        ListViewAdapter adapter=new ListViewAdapter(mData);
        //设置到RecycleView里
        mList.setAdapter(adapter);

    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu){
        getMenuInflater().inflate(R.menu.menu,menu);
        return super.onCreateOptionsMenu(menu);
    }
    @Override
    public boolean onOptionsItemSelected(MenuItem item){
        int itemId=item.getItemId();
        switch (itemId){
            case R.id.list_view_v_stander:
                break;
            case R.id.list_view_v_reverse:
                break;
            case R.id.list_view_h_stander:
                break;
            case R.id.list_view_h_reverse:
                break;

            case R.id.grid_view_v_stander:
                break;
            case R.id.grid_view_v_reverse:
                break;
            case R.id.grid_view_h_stander:
                break;
            case R.id.grid_view_h_reverse:
                break;

            case R.id.stagger_view_v_stander:
                break;
            case R.id.stagger_view_v_reverse:
                break;
            case R.id.stagger_view_h_stander:
                break;
            case R.id.stagger_view_h_reverse:
                break;
        }
        return super.onOptionsItemSelected(item);
    }
}

public class ListViewAdapter extends RecyclerView.Adapter<ListViewAdapter.InnerHolder>{

    private final List<ItemBean> mData;

    public ListViewAdapter(List<ItemBean>data){
        this.mData=data;
    }
    //创建条目

    @Override
    public InnerHolder onCreateViewHolder(ViewGroup parent, int viewType) {

        //传进去的这个view其实就是条目的界面
        //两个步骤
        //1.拿到view
        //2.创建InnerHolder
        View view= View.inflate(parent.getContext(),R.layout.item_list_view,null);
        return new InnerHolder(view);
    }

    //绑定Holder,用来设置数据
    @Override
    public void onBindViewHolder(InnerHolder holder, int position) {
        holder.setData(mData.get(position));

    }

    @Override
    public int getItemCount() {
        if(mData!=null){
            return mData.size();
        }
        return 0;
    }

    public class InnerHolder extends RecyclerView.ViewHolder {

        private  ImageView mIcon;
        private  TextView mTitle;

        public InnerHolder(View itemView) {
            super(itemView);
            //找到条目控件
            mIcon = (ImageView) itemView.findViewById(R.id.list_view_icon);
            mTitle = (TextView) itemView.findViewById(R.id.list_view_title);
        }

        //这个方法用于设置数据
        public void setData(ItemBean itemBean) {
                 //开始设置数据
            mIcon.setImageResource(itemBean.icon);

            mTitle.setText(itemBean.title);
        }
    }
}

public class ItemBean {
    public int icon;
    public String title;
}

public class Datas {
    public static int[] icons = {
            R.mipmap.a01,
            R.mipmap.a02,
            R.mipmap.a03,
            R.mipmap.a04,
            R.mipmap.a05,
            R.mipmap.a06,
            R.mipmap.a07,
            R.mipmap.a08,
            R.mipmap.a09,
            R.mipmap.a10};

}