package com.example.yummy.turingrobot;

import android.os.AsyncTask;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;

/**
 * 异步网络訪问类
 * Created by yummy on 2015/7/12.
 */
public class MyAsync extends AsyncTask<String,Void,String>{


    private String url;
    private HttpClient httpClient;
    private HttpGet httpGet;
    private HttpResponse httpResponse;
    private HttpEntity httpEntity;
    private InputStream inputStream;

    //使用回调的方法
    private CallData data;



    public MyAsync(String url, CallData data) {
        this.url = url;
        this.data = http://www.mamicode.com/data;>

（2）写一个数据接口，使得AsyncTask可以回调MainActivity组件进行显示。（一般也可以通过在AsyncTask的构造器中传进MainActivity引用来调用其组件）

package com.example.yummy.turingrobot;

/**
 * 数据回调接口
 * Created by yummy on 2015/7/12.
 */
public interface CallData {
    void getDataUrl(String data);
}

    @Override
         public void getDataUrl(String data) {
        System.out.println(data);
        lists.add(dataParse(data));
        //通知改变
        adapter.notifyDataSetChanged();
    }

            MyAsync myAsync = (MyAsync)new MyAsync("http://www.tuling123.com/openapi/api?" +
                    "key=<自己的key>"+"发送内容",this).execute();

    /**
     * 解析数据
     * @param result
     * @return
     */
    public Bean dataParse(String result){

        try{
            if(result.equals("亲。你还没有联网哦!")){
                Bean listData = http://www.mamicode.com/new Bean(result, Bean.RECEIVER,getTime());>

listview的优化显示
因为左右两边布局。传统的listview优化方法须要进行改进。
一般我们使用viewholder来进行缓存，只是因为多布局适配。所以应该相应多布局缓存。

package com.example.yummy.turingrobot;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;

import com.example.yummylau.turingrobot.ui.CircularImage;

import java.util.List;

/**
 * 适配器
 * Created by yummy on 2015/7/12.
 */
public class Adapter extends BaseAdapter{

    private List<Bean> lists;
    private Context context;
    private LayoutInflater inflater;
    private ViewHolderLeft left;
    private ViewHolderRight right;

    //布局数目
    private final int VIEW_TYPE = 2;
    //0为发送
    private final int TYPE_0 = 0;
    //1为接受
    private final int TYPE_1 = 1;



    public Adapter(List<Bean> lists,Context context) {
        this.lists = lists;
        this.context = context;
    }

    @Override
    public int getCount() {
        return lists.size();
    }

    @Override
    public Object getItem(int position) {
        return lists.get(position);
    }

    @Override
    public long getItemId(int position) {
        return position;
    }


    /**
     * 说明下这种方法。每个view被调用的时候都会调用此方法。获取当前所须要的view样式
     * @param position
     * @return
     */
    @Override
    public int getItemViewType(int position) {
        return (lists.get(position).getFlag()== Bean.SEND)?TYPE_0:TYPE_1;
    }


    /**
     * 返回布局类型
     * @return
     */
    @Override
    public int getViewTypeCount() {
        return VIEW_TYPE;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {

        left = null;
        right = null;

        inflater = LayoutInflater.from(context);

        int tpye = getItemViewType(position);
       //System.out.print(tpye+"                             ddd            ");

        //初始化布局
        if(convertView == null){

            switch (tpye){

                //0为发送
                case TYPE_0:
                    convertView = inflater.inflate(R.layout.rightitem,null);
                    right = new ViewHolderRight();
                    right.rtextView = (TextView)convertView.findViewById(R.id.id_tv);
                    right.rtime = (TextView)convertView.findViewById(R.id.id_time);
                    right.riv = (CircularImage)convertView.findViewById(R.id.id_iv);
                    convertView.setTag(right);
                    break;

                //1为接受
                case TYPE_1:
                    convertView = inflater.inflate(R.layout.leftitem,null);
                    left = new ViewHolderLeft();
                    left.ltextView = (TextView)convertView.findViewById(R.id.id_tv);
                    left.ltime = (TextView)convertView.findViewById(R.id.id_time);
                    left.liv = (CircularImage)convertView.findViewById(R.id.id_iv);
                    convertView.setTag(left);
                    break;
            }

        }else{

            switch (tpye){

                //0为发送
                case TYPE_0:
                    right = (ViewHolderRight)convertView.getTag();
                    break;

                //1为接收
                case TYPE_1:
                    left = (ViewHolderLeft)convertView.getTag();
                    break;

            }

        }


        /**
         * 设置每个布局的资源
         */
        switch (tpye){

            //0为发送
            case TYPE_0:
                right.rtextView.setText(lists.get(position).getContent());
                right.rtime.setText(lists.get(position).getTime());
                right.riv.setImageResource(R.drawable.youtouxiang);
                break;

                //1为接收
            case TYPE_1:
                left.ltextView.setText(lists.get(position).getContent());
                left.ltime.setText(lists.get(position).getTime());
                left.liv.setImageResource(R.drawable.zuotouxiang);
                break;

        }


        return convertView;

    }


    //左側缓冲类
    static class ViewHolderLeft{
        TextView ltextView;
        TextView ltime;
        CircularImage liv;
    }

    //右側缓冲类
    static class ViewHolderRight{
        TextView rtextView;
        TextView rtime;
        CircularImage riv;
    }


}