ListView的应用---------Day05 2014 06 05 小书童代码

package com.example.ex_day00_mb;

import java.util.ArrayList;

import android.os.Bundle;

import android.app.Activity;

import android.content.ClipData.Item;

import android.content.Intent;

import android.util.Log;

import android.view.ContextMenu;

import android.view.LayoutInflater;

import android.view.Menu;

import android.view.MenuItem;

import android.view.View;

import android.view.ContextMenu.ContextMenuInfo;

import android.view.View.OnCreateContextMenuListener;

import android.view.View.OnLongClickListener;

import android.view.ViewGroup;

import android.view.View.OnClickListener;

import android.widget.Adapter;

import android.widget.AdapterView;

import android.widget.AdapterView.OnItemClickListener;

import android.widget.AdapterView.OnItemLongClickListener;

import android.widget.AdapterView.OnItemSelectedListener;

import android.widget.BaseAdapter;

import android.widget.Button;

import android.widget.ImageView;

import android.widget.ListView;

import android.widget.TextView;

import android.widget.Toast;

public class MainActivity extends Activity implements OnClickListener {

int[] tupian = {R.drawable.cn01,R.drawable.cn02,R.drawable.cn03,R.drawable.cn04,

R.drawable.cn05,R.drawable.cn06,R.drawable.cn07,R.drawable.cn08,

R.drawable.cn09,R.drawable.cn10,R.drawable.cn11,R.drawable.cn12};

String[] text = {"时钟","机器人管家","二维码扫描","蓝牙","世界地图",

"wifi共享软件","计算器","日历","录像机","照相机","指南针","小书童"}; 

String[] text2 = {"下载信息：版本 v3.0 受欢迎：55% 大小3.3M","下载信息：版本 v5.2 受欢迎：88% 大小 9.3M,下载信息：版本 v8.2 受欢迎：88% 大小 2.3M","下载信息：版本 v8.2 受欢迎：98% 大小 2.3M," +

"下载信息：版本 v3.2 受欢迎：98% 大小 2.3M","下载信息：版本 v3.2 受欢迎：98% 大小 2.3M," +

"下载信息：版本 v3.2 受欢迎：98% 大小 2.3M","下载信息：版本 v3.2 受欢迎：98% 大小 2.3M," +

"下载信息：版本 v3.2 受欢迎：98% 大小 2.3M","下载信息：版本 v3.2 受欢迎：98% 大小 2.3M," +

"下载信息：版本 v3.2 受欢迎：88% 大小 2.3M","下载信息：版本 v8.2 受欢迎：98% 大小 2.3M," +

"下载信息：版本 v3.2 受欢迎：98% 大小 2.3M","下载信息：版本 v3.2 受欢迎：98% 大小 2.3M," +

"下载信息：版本 v3.2 受欢迎：98% 大小 2.3M","下载信息：版本 v8.2 受欢迎：98% 大小 2.3M," +

"下载信息：版本 v3.2 受欢迎：98% 大小 2.3M","下载信息：版本 v3.2 受欢迎：98% 大小 2.3M," +

"下载信息：版本 v5.2 受欢迎：98% 大小 2.3M","下载信息：版本 8.2 受欢迎：98% 大小 2.3M," +

"下载信息：版本 v3.2 受欢迎：98% 大小 2.3M","下载信息：版本 v3.2 受欢迎：98% 大小 2.3M"};

class Mydate

{

int tupian;

String text;

String text2;

public Mydate(int tupian, String text, String text2) {

super();

this.tupian = tupian;

this.text = text;

this.text2 = text2;

}

}

ArrayList<Mydate> list = new ArrayList<Mydate>();

MyAdapter myAdapter = null;

int pos;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        final ListView listview = (ListView)findViewById(R.id.listView1);

         findViewById(R.id.button1).setOnClickListener(this);

        findViewById(R.id.button2).setOnClickListener(this);

        for (int i = 0; i < tupian.length; i++) {

list.add(new Mydate(tupian[i],text[i],text2[i]));

}

         myAdapter = new MyAdapter();

        listview.setAdapter(myAdapter);

        listview.setOnItemClickListener(new OnItemClickListener() {

@Override

public void onItemClick(AdapterView<?> parent, View view,

int position, long id) {

   Mydate mydate = list.get(position);

                    Intent intent = new Intent();

                    intent.putExtra("name", mydate.text+"下载");

                    intent.putExtra("tupian", mydate.tupian);

                    intent.setClass(MainActivity.this, SecondActivity.class);

                    startActivity(intent);

}

});

        listview.setOnItemLongClickListener(new OnItemLongClickListener() {

@Override

public boolean onItemLongClick(AdapterView<?> parent, View view,

int position, long id) {

   pos = position;

   listview.showContextMenu();

return true;

}

});

       listview.setOnCreateContextMenuListener(new OnCreateContextMenuListener() {

@Override

public void onCreateContextMenu(ContextMenu menu, View v,

ContextMenuInfo menuInfo) {

  menu.setHeaderTitle(list.get(pos).text);

  menu.add(0, 1, 0, "编辑");

  menu.add(0,2,0,"***");

               menu.add(0, 3, 0, "取消");

}

});

   

    }

    

    @Override

    public boolean onContextItemSelected(MenuItem item) {

    Mydate mydate = list.get(pos);

    switch (item.getItemId()) {

case 1:

Toast.makeText(this, "��"+mydate.text, Toast.LENGTH_LONG).show();

break;

case 2:

Toast.makeText(this, "�h除"+mydate.text, Toast.LENGTH_LONG).show();

break;

case 3:

Toast.makeText(this, "取消"+mydate.text, Toast.LENGTH_LONG).show();

break;

default:

break;

}

    return super.onContextItemSelected(item);

   

    }

     class User

     {

    ImageView imageview = null;

TextView textview = null;

TextView textview2 = null;

    public User()

    {

     

    }

     }

     class MyAdapter extends BaseAdapter

     {

         

@Override

    public View getView(int position, View convertView, ViewGroup parent)

    {

User user = new User();

LayoutInflater layoutInflater = null;

View inflate = null;

// ImageView imageview = null;

//     TextView textview = null;

//     TextView textview2 = null;

    if (convertView == null) {

//得到布局转换器

    layoutInflater = getLayoutInflater();

    //把布局文件转换成布局对象

    inflate = layoutInflater.inflate(R.layout.itemp, null);

    user.textview = (TextView)inflate.findViewById(R.id.textView1);

    user.imageview = (ImageView)inflate.findViewById(R.id.imageView1);

    user.textview2 = (TextView)inflate.findViewById(R.id.textView2);

    //把�ο蟠嫫��

    inflate.setTag(user);

}else

{

//用已经完全消失的布局对象去替代即将出现的布局对象

inflate = convertView;

user = (User)inflate.getTag();

}

    Mydate mydate = list.get(position);

             user.imageview.setImageResource(mydate.tupian);

             user.textview.setText(position+1+"."+mydate.text);

             Log.e("MyAdapter",""+position+convertView);

             user.textview2.setText(mydate.text2);

    return inflate;

    }

@Override

public int getCount()

{

// TODO Auto-generated method stub

return list.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 void onClick(View v) {

switch (v.getId()) {

case R.id.button1:

list.add(new Mydate(R.drawable.cn13,"小书童","我爱android"));

myAdapter.notifyDataSetChanged();

break;

case R.id.button2:

   if(list.size()>0)

   {

   list.remove(list.size()-1);

   myAdapter.notifyDataSetChanged();

   }

break;

default:

break;

}

}

}

//notifyDataSetChanged()  //更新List,增加数据