读取本地json的时候，asset下的文件名要包括扩展名

package com.example.jsonresolvetest;

import java.io.BufferedReader;
import java.io.File;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.List;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import com.example.jsonresolvetest.bean.ArenaBean;

import android.support.v7.app.ActionBarActivity;
import android.support.v7.app.ActionBar;
import android.support.v4.app.Fragment;
import android.content.Context;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ListView;
import android.os.Build;

public class MainActivity extends ActionBarActivity {
    
    //这个类就是解析类
 //1 从网络拿，展示数据，2从本地json里拿，展示数据
    private ListView lv_arena;
    

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        lv_arena = (ListView) findViewById(R.id.lv_arena);
        
        jsonData(MainActivity.this, "jsonarena.json");/**尤其需要注意：这里的json文件要带扩展名，要写成"jsonarena.json" 而不是"jsonarena"*/
    }
    
     public static JSONObject jsonData(Context context,String fileName){//filename assets目录下的json文件名  
            JSONObject jsonDate=null; 
            
            try {  
　　　　　　　　　//jsonarena.json文件是放在项目的assets文件夹下的
                InputStreamReader inputStreamReader=new InputStreamReader(context.getAssets().open(fileName),"UTF-8"); //找不着jsonarena文件 
                BufferedReader bufferedReader=new BufferedReader(inputStreamReader);  
                String line;  
                StringBuilder stringBuilder=new StringBuilder();  
                while ((line=bufferedReader.readLine())!=null){  
                    stringBuilder.append(line);  
                }  
                bufferedReader.close();  
                inputStreamReader.close();  
                jsonDate=JSON.parseObject(stringBuilder.toString());//得到JSONobject对象   
                Log.e("jsonDate","=="+jsonDate);  
                int retArray=jsonDate.getIntValue("ret");//得到ret的内容  
                Log.e("retArray","=="+retArray);  
                
                String msgArray = jsonDate.getString("msg");//得到msg的内容
                Log.e("msgArray","=="+msgArray); 
                
                
                JSONArray  arenaArray=jsonDate.getJSONArray("arena");//得到arena节点，不懂得看Log打印就清楚了  
                Log.e("arenaArray","=="+arenaArray);  
                
                List<ArenaBean> listArenaBean=JSON.parseArray(arenaArray.toString(),ArenaBean.class);  //Series 相当于ArenaBean节点
                for(ArenaBean arenaBean:listArenaBean){  
                    Log.e("arena.getId","="+arenaBean.getId());  
                    Log.e("arena.getname","="+arenaBean.getName());  
                    Log.e("arena.getId","="+arenaBean.getStatus()); 
                }  
      
            } catch (IOException e) { 
                e.printStackTrace();  
            }  
            
            return jsonDate;  
        } 
    

}

package com.example.jsonresolvetest.bean;

public class ArenaBean {

    private int id;
    private String name;
    private int status;
    
    public int getId() {
        return id;
    }
    public void setId(int id) {
        this.id = id;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public int getStatus() {
        return status;
    }
    public void setStatus(int status) {
        this.status = status;
    }
    
    
    
}