关于给ListView item加点击事件。

[zZzzoi]

package com.example.qqclient;

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

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

import com.example.qquser.QqUser;

import MySocket.MySocket;
import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.View;
import android.view.ViewGroup;
import android.view.Window;
import android.widget.BaseAdapter;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;

public class ShowActivity extends Activity {
	
	MySocket socket;
	String jsonbuf;
	MyHandler h;
	QqUser user;
	ArrayList<QqUser> users;
	Myadapter adapter;
	ListView lv;
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		requestWindowFeature(Window.FEATURE_NO_TITLE);
		setContentView(R.layout.activity_show);
		new Thread(new ClientThread()).start();
		
		
		lv = (ListView) findViewById(R.id.lv1);
		adapter = new Myadapter();
		
		h = new MyHandler();
		lv.setOnItemClickListener(new MyItemClickListener());
		
	}
	//	网络连接，得到登陆完传回来的jsonbuf
	class ClientThread implements Runnable {
		public void run() {
			try {
				socket = MySocket.getSocket();
				jsonbuf = socket.getjsonbuf();
				h.sendEmptyMessage(1);
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
	}
	
	class MyHandler extends Handler {
		@Override
		public void handleMessage(Message msg) {
			switch (msg.what) {
			case 1:
				jsonstrToobj();
				lv.setAdapter(adapter);
				break;
			}
		}
	}
	//item点击监听
	public class MyItemClickListener implements OnItemClickListener{

		@Override
		public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
			// TODO Auto-generated method stub
			QqUser userc = (QqUser) parent.getItemAtPosition(position);
			System.out.println("position::"+position);
			System.out.println(userc);
		//	System.out.println(user.getName());
		}
	}

	//ListView  数据适配器
	class Myadapter extends BaseAdapter{

		@Override
		public int getCount() {
			// TODO Auto-generated method stub
			return users.size();
		}

		@Override
		public Object getItem(int position) {
			// TODO Auto-generated method stub
			return null;
		}

		@Override
		public long getItemId(int position) {
			// TODO Auto-generated method stub
			return 0;
		}

		@Override
		public View getView(int position, View convertView, ViewGroup parent) {
			// TODO Auto-generated method stub
			
			QqUser user = users.get(position);
			View view = View.inflate(ShowActivity.this, R.layout.list_item1, null);
			TextView tv_name = (TextView) view.findViewById(R.id.tv_name);
			tv_name.setText(user.getName());
			
			TextView tv_qq = (TextView) view.findViewById(R.id.tv_qq);
			tv_qq.setText(Integer.toString(user.getQq()));
			
			return view;
		}
		
	}
	
	//jsonbuf获取用户集合
	public void jsonstrToobj(){
		JSONObject obj;
		try {
			users = new ArrayList<QqUser>();
			obj = new JSONObject(jsonbuf);
			JSONArray arr = obj.getJSONArray("users");
			for(int i=0; i<arr.length(); i++){
				JSONObject o = arr.getJSONObject(i);
				user = new QqUser();
				user.setAge(o.getInt("age"));
				user.setName(o.getString("name"));
				user.setQq(o.getInt("qq"));
				user.setSex(o.getBoolean("sex"));
				user.setStatus(o.getBoolean("status"));
				users.add(user);
			}
		} catch (JSONException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
	
	
}

	

83行的地方，为什么user的值null?
点击的时候打印的position位置是正确的。