RecyclerView

来源：互联网发布：炉石大数据各数据意义编辑：程序博客网时间：2024/06/08 04:54
//bean包
public class ItemBean {    private String name;    private String age;    public ItemBean(String name, String age) {        this.name = name;        this.age = age;    }    public String getName() {        return name;    }    public void setName(String name) {        this.name = name;    }    public String getAge() {        return age;    }    public void setAge(String age) {        this.age = age;    }    @Override    public String toString() {        return "ItemBean{" +                "name='" + name + '\'' +                ", age='" + age + '\'' +                '}';    }}//adapterpublic 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);        }*/        View view1 = LayoutInflater.from(context).inflate(R.layout.item1, parent, false);        viewHolder = new Type1Viewholder(view1);        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(itemBean);        notifyItemInserted(1);    }}//main方法 package com.bwei.recylerviewdemo;import android.os.Bundle;import android.os.Handler;import android.support.v4.widget.SwipeRefreshLayout;import android.support.v7.app.AppCompatActivity;import android.support.v7.widget.DefaultItemAnimator;import android.support.v7.widget.DividerItemDecoration;import android.support.v7.widget.GridLayoutManager;import android.support.v7.widget.LinearLayoutManager;import android.support.v7.widget.RecyclerView;import android.view.View;import android.widget.Button;import android.widget.Toast;import java.util.ArrayList;import java.util.List;public class MainActivity extends AppCompatActivity 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();        //初始化组件        rv= (RecyclerView) findViewById(R.id.rv);        show(false);    }    private void initView() {        mBt = (Button) findViewById(R.id.bt);        mBt.setOnClickListener(this);        mSrl = (SwipeRefreshLayout) findViewById(R.id.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 view) {        switch (view.getId()){            case R.id.bt:                String str = mBt.getText().toString().trim();                mBt.setText("垂直");                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() {    }    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();            }        });    }}
//布局
<?xml version="1.0" encoding="utf-8"?><LinearLayout    xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:app="http://schemas.android.com/apk/res-auto"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical"    tools:context="com.bwei.recylerviewdemo.MainActivity">        <Button            android:id="@+id/bt"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:text="网格"/>    <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="wrap_content"            android:layout_height="wrap_content"/>    </android.support.v4.widget.SwipeRefreshLayout></LinearLayout>

//item
<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:id="@+id/ll"    android:layout_width="match_parent"    android:layout_height="45dp"    android:background="#330000ff"    android:gravity="center_vertical"    android:orientation="horizontal">    <ImageView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:background="@mipmap/ic_launcher" />    <TextView        android:id="@+id/tv_name"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:textSize="20sp" />    <TextView        android:id="@+id/tv_age"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:textSize="20sp" /></LinearLayout>
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