RecyclerView . item多条目加载

来源：互联网发布：骑士队数据编辑：程序博客网时间：2024/06/06 06:44

////////////////////////////////main.xml///////////////////

    <android.support.v4.widget.SwipeRefreshLayout
        android:id="@+id/srl"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <android.support.v7.widget.RecyclerView
            android:id="@+id/rv"
            android:layout_width="match_parent"
            android:layout_height="match_parent" />
    </android.support.v4.widget.SwipeRefreshLayout>

/////////////////////////////////////////MainAcitivity////////////////////////////////////////////

public class MainActivity extends BaseActivity implements View.OnClickListener {
    private List<ItemBean> list = new ArrayList<>();
    private Button mBt;
    private RecyclerView rv;
    private SwipeRefreshLayout mSrl;
    private MyAdapter adapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initView();
    }

    private void initView() {
        mBt = (Button) findViewById(R.id.bt);
        mBt.setOnClickListener(this);
        mSrl = (SwipeRefreshLayout) findViewById(srl);
        mSrl.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
            @Override
            public void onRefresh() {
                Toast.makeText(MainActivity.this, "onRefresh开始", Toast.LENGTH_SHORT).show();
                //网络请求数据，然后更新列表
                new Handler().postDelayed(new Runnable() {
                    @Override
                    public void run() {
                        Toast.makeText(MainActivity.this, "数据请求完成，并且更新了列表", Toast.LENGTH_SHORT).show();
                        List<ItemBean> l = new ArrayList<ItemBean>();
                        for (int i = 0; i < 10; i++) {
                            ItemBean itemBean = new ItemBean("名字" + i, "年龄" + i);
                            l.add(itemBean);
                        }
                        adapter.refresh(l);
                        mSrl.setRefreshing(false);
                    }
                }, 3000);
            }
        });
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.bt:
               /* String str = mBt.getText().toString().trim();
                if ("网格".equals(str)) {
                    show(false);
                    mBt.setText("垂直");
                } else {
                    show(true);
                    mBt.setText("网格");
                }*/
                //给该列表，填加一个新的条目
                adapter.addItem(new ItemBean("新的", "心底"));
                break;
        }
    }

private void refresh() {

}

    /**
     * 展示页面数据
     *
     * @param flag
     */
    private void show(boolean flag) {
        //设置布局管理器
        rv.setLayoutManager(new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false));
//        rv.setLayoutManager(new GridLayoutManager(this, 2));
        //添加分割线
        RecyclerView.LayoutManager layoutManager = null;
        if (flag) {
            layoutManager = new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false);
        } else {
            layoutManager = new GridLayoutManager(this, 2);
        }
//        rv.setLayoutManager(new StaggeredGridLayoutManager(3,StaggeredGridLayoutManager.VERTICAL));
        rv.setLayoutManager(layoutManager);
        //设置分割线
        rv.addItemDecoration(new DividerItemDecoration(this, DividerItemDecoration.VERTICAL));
        //设置动画
        rv.setItemAnimator(new DefaultItemAnimator());
        //设置适配器
        for (int i = 0; i < 100; i++) {
            ItemBean itemBean = new ItemBean("name" + i, "age" + i);
            list.add(itemBean);
        }
        adapter = new MyAdapter(this, list);
        rv.setAdapter(adapter);

        adapter.setOnItemListener(new MyAdapter.OnItemListener() {
            @Override
            public void onItemClick(ItemBean itemBean, int position) {
                Toast.makeText(MainActivity.this, "点击：" + position + " " + itemBean.toString(), Toast.LENGTH_SHORT).show();
            }

            @Override
            public void onItemLongClick(ItemBean itemBean, int position) {
                Toast.makeText(MainActivity.this, "长按：" + position + " " + itemBean.toString(), Toast.LENGTH_SHORT).show();
            }
        });
    }
}

///////////////////////适配器/////////////////////

public class MyAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
    private Context context;
    private List<ItemBean> list;
    private OnItemListener onItemListener;
    private static int TYPE1 = 0;
    private static int TYPE2 = 1;

public interface OnItemListener {
public void onItemClick(ItemBean itemBean, int position);

public void onItemLongClick(ItemBean itemBean, int position);
}

    public void setOnItemListener(OnItemListener onItemListener) {
        this.onItemListener = onItemListener;
    }

    public MyAdapter(Context context, List<ItemBean> list) {
        this.context = context;
        this.list = list;
    }

    @Override
    public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        //加载写好的item布局
        RecyclerView.ViewHolder viewHolder = null;
        if (viewType == TYPE1) {
            View view1 = LayoutInflater.from(context).inflate(R.layout.item1, parent, false);
            viewHolder = new Type1Viewholder(view1);
        } else {
            View view2 = LayoutInflater.from(context).inflate(R.layout.item2, parent, false);
            viewHolder = new Type2Viewholder(view2);
        }

return viewHolder;
}

    @Override
    public int getItemViewType(int position) {
        return position % 2 == 0 ? TYPE1 : TYPE2;
    }

    @Override
    public void onBindViewHolder(RecyclerView.ViewHolder holder, final int position) {
        //给item布局里的组件设置值
        if (holder instanceof Type1Viewholder) {
            final ItemBean itemBean = list.get(position);
            Type1Viewholder type1Viewholder = (Type1Viewholder) holder;
            type1Viewholder.tvName.setText(itemBean.getName());
            type1Viewholder.tvAge.setText(itemBean.getAge());

            type1Viewholder.ll.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    if (onItemListener != null) {
                        onItemListener.onItemClick(itemBean, position);
                    }
                }
            });
            type1Viewholder.ll.setOnLongClickListener(new View.OnLongClickListener() {
                @Override
                public boolean onLongClick(View view) {
                    if (onItemListener != null) {
                        onItemListener.onItemLongClick(itemBean, position);
                    }
                    return true;
                }
            });
        } else {
            Type2Viewholder type2Viewholder = (Type2Viewholder) holder;
        }
    }

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

    private class Type1Viewholder extends RecyclerView.ViewHolder {
        //类似listview的adapter的viewholder
        private TextView tvName;
        private TextView tvAge;
        private LinearLayout ll;

        public Type1Viewholder(View itemView) {
            super(itemView);
            tvName = itemView.findViewById(R.id.tv_name);
            tvAge = itemView.findViewById(R.id.tv_age);
            ll = itemView.findViewById(R.id.ll);
        }
    }

private class Type2Viewholder extends RecyclerView.ViewHolder {

        public Type2Viewholder(View itemView) {
            super(itemView);
        }
    }

    public void refresh(List<ItemBean> l) {
        list.clear();
        list.addAll(l);
        notifyDataSetChanged();
    }

    public void addItem(ItemBean itemBean) {
        list.add(0, itemBean);
        notifyItemInserted(0);
    }
}

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