安卓开发--ListView

package com.zx.listview01;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import android.R.integer;
import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.AbsListView;
import android.widget.AbsListView.OnScrollListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.Toast;

public class MainActivity extends Activity implements OnItemClickListener,OnScrollListener{
//ListView需要创建适配器用于绑定展示数据
private ArrayAdapter<String> arr_adapter;
private SimpleAdapter simpleAdapter;
private ListView lView;

private List<Map<String, Object>> data;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

String[] arrStrings={"京东","淘宝","网易"};
lView=(ListView)findViewById(R.id.listView1);
arr_adapter=new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, arrStrings);
//ListView绑定适配器
//lView.setAdapter(arr_adapter);

data=new ArrayList<Map<String,Object>>();
simpleAdapter =  new SimpleAdapter(this, GetData(), R.layout.itemmain, new String[]{"imageView1","textView1"}, new int[] {R.id.imageView1,R.id.textView1});
lView.setAdapter(simpleAdapter);

lView.setOnItemClickListener(this);
lView.setOnScrollListener(this);
}

private List<Map<String, Object>> GetData() {
for(int i=0;i<20;i++){
Map<String, Object> map=new HashMap<String, Object>();
map.put("imageView1", R.drawable.ic_launcher);
map.put("textView1", "你好"+i);
data.add(map);
}
return data;
}

@Override
public void onScrollStateChanged(AbsListView view, int scrollState) {
// TODO 自动生成的方法存根
switch (scrollState) {
case SCROLL_STATE_FLING://用户在手指离开屏幕之前,由于用力划了一下,视图仍然依靠惯性滑动
Map<String, Object> map=new HashMap<String, Object>();
map.put("imageView1", R.drawable.ic_launcher);
map.put("textView1", "淘宝");
data.add(map);
simpleAdapter.notifyDataSetChanged();

break;
case SCROLL_STATE_IDLE://视图停止滑动
break;
case SCROLL_STATE_TOUCH_SCROLL://手指没有离开屏幕,视图正在滑动
break;
}
}

@Override
public void onScroll(AbsListView view, int firstVisibleItem,
int visibleItemCount, int totalItemCount) {
// TODO 自动生成的方法存根

}

@Override
public void onItemClick(AdapterView<?> parent, View view, int position,
long id) {
// TODO 自动生成的方法存根
String txtString = lView.getItemAtPosition(position).toString();

Toast.makeText(this, "下标:"+position+",内容:"+txtString, Toast.LENGTH_SHORT).show();
}
}