android开发教程之listview显示sqlite数据

package com.it.db;

import java.util.list;
import com.it.dao.persondao;
import com.it.domain.person;
import android.os.bundle;
import android.app.activity;
import android.content.intent;
import android.view.view;
import android.view.viewgroup;
import android.widget.adapterview;
import android.widget.adapterview.onitemclicklistener;
import android.widget.baseadapter;
import android.widget.listview;
import android.widget.textview;

public class mainactivity extends activity {
 private listview lv;
 private list<person> persons;
 @override
 protected void oncreate(bundle savedinstancestate) {
  super.oncreate(savedinstancestate);
  setcontentview(r.layout.activity_main);

  persondao dao=new persondao(this);
  persons=dao.findall();
  lv=(listview) findviewbyid(r.id.lv);
  lv.setadapter(new myadapter());

  lv.setonitemclicklistener(new onitemclicklistener() {
   //点击的数据 传到上一个activity
   @override
   public void onitemclick(adapterview<?> parent, view view,
     int position, long id) {
    // todo auto-generated method stub
    person mperson=persons.get(position);
    string number=mperson.getnumber();
    intent data=new intent();
    data.putextra("number", number);
    setresult(0, data);
    //点击 即关闭此activity
    finish();
   }
  });
 }

 private class myadapter extends baseadapter{
  private static final string tag = "myadapter";

  /**
   * 控制listview里有多少个条目
   */
  @override
  public int getcount() {
   // todo auto-generated method stub
   return persons.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
   /**
    * 采用inflater显示
    */
   person person=persons.get(position);
   view view=view.inflate(mainactivity.this, r.layout.list_item, null);

   textview tv_id=(textview) view.findviewbyid(r.id.tv_id);
   tv_id.settext("id:"+person.getid());

   textview tv_name=(textview) view.findviewbyid(r.id.tv_name);
   tv_name.settext("姓名:"+person.getname());

   textview tv_number=(textview) view.findviewbyid(r.id.tv_number);
   tv_number.settext("电话:"+person.getnumber());

   return view;
   }
   /**
    * 不用inflater
    *
   log.i(tag, "位置"+position);   //看效果
   textview tv=new textview(getapplicationcontext());
   tv.settextsize(20);
   tv.settextcolor(color.black);
   //每个位置上的条目
   person person=persons.get(position);
   tv.settext(person.tostring());
   return tv;
  }*/

 }
}