RecyclerView的用法

最新推荐文章于 2024-09-07 00:06:36 发布

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最新推荐文章于 2024-09-07 00:06:36 发布

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本文链接：https://blog.youkuaiyun.com/qq_36073227/article/details/53305950

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本文详细介绍了一个使用Android RecyclerView进行数据展示的例子，包括依赖引入、布局文件定义、适配器编写及主Activity中的数据获取与展示流程。

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//导包

compile 'com.android.support:recyclerview-v7:24.1.1'
compile 'com.squareup.okhttp3:okhttp:3.4.2'
compile 'com.squareup.okhttp3:logging-interceptor:3.4.2'

//先布局

<android.support.v7.widget.RecyclerView

    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@+id/re"

    />

//子布局

<TextView
    android:id="@+id/tv_context"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:maxLines="2"
    android:text="内容" />

<RelativeLayout
    android:layout_width="wrap_content"
    android:layout_height="wrap_content">

    <TextView
        android:id="@+id/tv_time"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"
        android:text="时间" />
</RelativeLayout>

//适配器

package com.bwie.nainxi;

import android.content.Context;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

import com.bwie.nainxi.bean.Bean;

import java.util.List;

/**
 * Created by shenhao on 2016/11/23.
 */
public class RecyclerViewAdapter extends RecyclerView.Adapter<RecyclerViewAdapter.MyViewHolder> {
    private List<Bean> list;
    private Context context;

    public RecyclerViewAdapter(List<Bean> list, Context context) {


        this.list = list;
        this.context = context;

    }

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


    }

    @Override
    public void onBindViewHolder(MyViewHolder holder, int position) {
        holder.tv_context.setText(list.get(position).getContent());
        holder.tv_time.setText(list.get(position).getUpdatetime());
    }

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


    class MyViewHolder extends RecyclerView.ViewHolder{
        TextView tv_context, tv_time;
        public MyViewHolder(View itemView) {
            super(itemView);
            tv_time= (TextView) itemView.findViewById(R.id.tv_context);
            tv_context  = (TextView) itemView.findViewById(R.id.tv_time);
        }
    }
}

//主Activity

package com.bwie.nainxi;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;

import com.bwie.nainxi.bean.Bean;

import org.json.JSONArray;
import org.json.JSONObject;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import okhttp3.Request;


public class MainActivity extends AppCompatActivity {
    private RecyclerViewAdapter adapter;
    private RecyclerView re;
    private List<Bean> list=new ArrayList<Bean>();
    private String path="http://japi.juhe.cn/joke/content/list.from?key=%20874ed931559ba07aade103eee279bb37%20&page=3&pagesize=10&sort=asc&time=1418745237";
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        re =(RecyclerView)findViewById(R.id.re);

        re.setLayoutManager(new LinearLayoutManager(this));

//如果想要实现Gridview的样子  很easy     //re.setLayoutManager(new GridLayoutManager(this,4));
        initData();        adapter =new RecyclerViewAdapter(list,MainActivity.this);    }    protected void initData()    {        OkHttp.getAsync(path, new OkHttp.DataCallBack() {            @Override            public void requestFailure(Request request, IOException e) {            }            @Override            public void requestSuccess(String result) throws Exception {                List<Bean> lists=new ArrayList<Bean>();                JSONObject object=new JSONObject(result);                JSONObject reas=object.optJSONObject("result");                JSONArray arr=reas.optJSONArray("data");                for(int i=0;i<arr.length();i++)                {                    JSONObject o=(JSONObject)arr.get(i);                    String content=o.getString("content");                    String updatetime=o.getString("updatetime");                    Bean bean=new Bean(content,updatetime);                    lists.add(bean);                }                list.addAll(lists);      re.setAdapter(adapter);
      }        });    }}