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();
	}
}