新手 看了网上很多资料后 学习写的一个listview

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package wx.android.test.listviewbutton;

  

import java.util.ArrayList;

import java.util.HashMap;

import android.app.Activity;

import android.app.AlertDialog;

import android.content.Context;

import android.content.DialogInterface;

import android.os.Bundle;

import android.util.Log;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;

import android.view.View.OnClickListener;

import android.widget.AdapterView;

import android.widget.BaseAdapter;

import android.widget.Button;

import android.widget.ImageView;

import android.widget.ListView;

import android.widget.TextView;

import android.widget.AdapterView.OnItemClickListener;

  

public class ListViewButton extendsActivity {

    /** Called when the activity is first created. */

    ArrayList<HashMap<String, Object>> listitem ;

    privateListView hh;

  

    @Override

      

    publicvoid onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

          

         

         hh=(ListView)findViewById(R.id.lv);

        MyAdapter mAdapter =new MyAdapter(this);

        hh.setAdapter(mAdapter);

        hh.setOnItemClickListener(newOnItemClickListener(){

              

            @Override

            publicvoid onItemClick(AdapterView<?> arg0, View arg1,int arg2,

                    longarg3) {

                // TODO Auto-generated method stub

                //setTitle("你点击了第"+arg2+"行");

                 Log.v("MyListViewBase","你点击了ListView条目" + arg2);

            }

              

              

        });

    }

    privateArrayList<HashMap<String,Object>> getDate(){

          

        ArrayList<HashMap<String,Object>> listitem =new ArrayList<HashMap<String,Object>>();

    for(inti=0;i<20;i++){

        HashMap<String,Object> map =newHashMap<String,Object>();

        map.put("ItemTitle","第"+i+"行");

        map.put("ItemText","这是第"+i+"行");

        map.put("ItemImage", R.drawable.icon);

        listitem.add(map);

    }

          

          

        returnlistitem;

    

    }

    publicvoid showinfo(){

      

        newAlertDialog.Builder(this)

        .setTitle("Are you sure exit?").setCancelable(false).setPositiveButton("Yes",

                new DialogInterface.OnClickListener() {

                      

                    @Override

                    publicvoid onClick(DialogInterface dialog,int which) {

                        // TODO Auto-generated method stub

                        ListViewButton.this.finish();

  

                    }

                }).setNegativeButton("No",new DialogInterface.OnClickListener() {

                      

                    @Override

                    publicvoid onClick(DialogInterface dialog,int which) {

                        // TODO Auto-generated method stub

                        dialog.cancel();

                    }

                }).show();

          

  

        }

     

    privateclass MyAdapter extends BaseAdapter{

  

        privateLayoutInflater mInflater;

        publicMyAdapter(Context context){

        this.mInflater=LayoutInflater.from(context);

          

        }

  

        @Override

        publicint getCount() {

            // TODO Auto-generated method stub

            returngetDate().size();

        }

  

        @Override

        publicObject getItem(intposition) {

            // TODO Auto-generated method stub

            returnnull;

        }

  

        @Override

        publiclong getItemId(intposition) {

            // TODO Auto-generated method stub

            return0;

        }

  

        @Override

        publicView getView(finalint position, View convertView, ViewGroup parent) {

            ViewHolder hold;

            // Log.v("MyListViewBase", "getView " + position + " " + convertView); 

            if(convertView==null){

                convertView =mInflater.inflate(R.layout.item,null);

                hold=newViewHolder();

                hold.title=(TextView)convertView.findViewById(R.id.ItemTitle);

                hold.text=(TextView)convertView.findViewById(R.id.ItemText);

                hold.image=(ImageView)convertView.findViewById(R.id.ItemImage);

                hold.bt=(Button)convertView.findViewById(R.id.ItemButton);

                convertView.setTag(hold);

            }

            else{

                hold=(ViewHolder)convertView.getTag();

                }

                hold.title.setText(getDate().get(position).get("ItemTitle").toString());

                hold.text.setText(getDate().get(position).get("ItemText").toString());

                  

                hold.image.setBackgroundResource((Integer)getDate().get(position).get("ItemImage"));

                hold.bt.setOnClickListener(newOnClickListener(){

                      

  

                    @Override

                    publicvoid onClick(View v) {

                        // TODO Auto-generated method stub

                        showinfo();

                        //Log.v("MyListBase","你点击了按钮"+position);    

                    }

                });

              

              

              

              

            returnconvertView;

            // TODO Auto-generated method stub

              

        }

          

    }

    publicfinal class ViewHolder{     

        publicImageView image;

        publicTextView title;    

        publicTextView text;    

        publicButton   bt;     

        } 

}

item.xml

<?xml version="1.0"encoding="utf-8"?>

<RelativeLayout

  xmlns:android="http://schemas.android.com/apk/res/android"

  android:layout_width="fill_parent"

  android:layout_height="fill_parent">

     <Button

    android:layout_alignParentRight="true"

    android:layout_width="wrap_content" 

    android:layout_height="wrap_content" 

    android:id="@+id/ItemButton" 

     android:text="点我"

     android:layout_toLeftOf="@+id/ItemImage"

    />    

   <TextView 

android:id="@+id/ItemTitle" 

android:layout_height="wrap_content"

android:layout_width="fill_parent" 

android:textSize="20sp" 

   /> 

   <TextView  

   android:id="@+id/ItemText"

    android:layout_width="fill_parent" 

    android:layout_height="wrap_content" 

    android:layout_below="@+id/ItemTitle"

    />

    <ImageView

    android:id="@+id/ItemImage"

    android:layout_width="fill_parent" 

    android:layout_height="wrap_content" 

     android:layout_marginLeft="138dip"

      android:layout_marginRight="138dip" 

    />

      

</RelativeLayout>

main.xml

<?xml version="1.0"encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    

    android:layout_width="fill_parent"

    android:layout_height="fill_parent"

    >

<ListView

    android:id="@+id/lv"

    android:layout_width="fill_parent" 

    android:layout_height="fill_parent" 

  

    />

  

</LinearLayout>