<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical" ><Button    android:id="@+id/bt_load"          android:layout_width="fill_parent"          android:layout_height="wrap_content"        android:text="加载更多数据" /> <ProgressBarandroid:id="@+id/pg"      android:layout_width="wrap_content"      android:layout_height="wrap_content"      android:layout_gravity="center_horizontal"      android:visibility="gone"/></LinearLayout>

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical" >

<TextViewandroid:id="@+id/tv_title"        android:textSize="20sp"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_marginTop="5dp"/><TextViewandroid:textSize="12sp"        android:id="@+id/tv_content"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_marginTop="5dp"/>

</LinearLayout>

package com.notice.moredate;

import java.util.ArrayList;import java.util.HashMap;

import android.app.Activity;import android.os.Bundle;import android.os.Handler;import android.view.View;import android.view.View.OnClickListener;import android.widget.AbsListView;import android.widget.AbsListView.OnScrollListener;import android.widget.Button;import android.widget.ListView;import android.widget.ProgressBar;import android.widget.SimpleAdapter;import android.widget.Toast;

public class MoreDateListActivity extends Activity implements OnScrollListener {

// ListView的Adapter    private SimpleAdapter mSimpleAdapter;private ListView lv;private Button bt;private ProgressBar pg;private ArrayList<HashMap<String,String>> list;// ListView底部View    private View moreView;private Handler handler;// 设置一个最大的数据条数，超过即不再加载    private int MaxDateNum;// 最后可见条目的索引    private int lastVisibleIndex;

/** Called when the activity is first created. */    @Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);        setContentView(R.layout.main);

        MaxDateNum = 22; // 设置最大数据条数

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

// 实例化底部布局        moreView = getLayoutInflater().inflate(R.layout.moredate, null);

        bt = (Button) moreView.findViewById(R.id.bt_load);        pg = (ProgressBar) moreView.findViewById(R.id.pg);        handler = new Handler();

// 用map来装载数据，初始化10条数据        list = new ArrayList<HashMap<String,String>>();for (int i = 0; i < 10; i++) {            HashMap<String, String> map = new HashMap<String, String>();            map.put("ItemTitle", "第" + i + "行标题");            map.put("ItemText", "第" + i + "行内容");            list.add(map);        }// 实例化SimpleAdapter        mSimpleAdapter = new SimpleAdapter(this, list, R.layout.item,new String[] { "ItemTitle", "ItemText" },new int[] { R.id.tv_title, R.id.tv_content });// 加上底部View，注意要放在setAdapter方法前        lv.addFooterView(moreView);        lv.setAdapter(mSimpleAdapter);// 绑定监听器        lv.setOnScrollListener(this);

        bt.setOnClickListener(new OnClickListener() {

            @Overridepublic void onClick(View v) {                pg.setVisibility(View.VISIBLE);// 将进度条可见                bt.setVisibility(View.GONE);// 按钮不可见

                handler.postDelayed(new Runnable() {

                    @Overridepublic void run() {                        loadMoreDate();// 加载更多数据                        bt.setVisibility(View.VISIBLE);                        pg.setVisibility(View.GONE);                        mSimpleAdapter.notifyDataSetChanged();// 通知listView刷新数据                    }

                }, 2000);            }        });

    }

private void loadMoreDate() {int count = mSimpleAdapter.getCount();if (count + 5 < MaxDateNum) {// 每次加载5条            for (int i = count; i < count + 5; i++) {                HashMap<String, String> map = new HashMap<String, String>();                map.put("ItemTitle", "新增第" + i + "行标题");                map.put("ItemText", "新增第" + i + "行内容");                list.add(map);            }        } else {// 数据已经不足5条            for (int i = count; i < MaxDateNum; i++) {                HashMap<String, String> map = new HashMap<String, String>();                map.put("ItemTitle", "新增第" + i + "行标题");                map.put("ItemText", "新增第" + i + "行内容");                list.add(map);            }        }

    }

    @Overridepublic void onScroll(AbsListView view, int firstVisibleItem,int visibleItemCount, int totalItemCount) {// 计算最后可见条目的索引        lastVisibleIndex = firstVisibleItem + visibleItemCount - 1;

// 所有的条目已经和最大条数相等，则移除底部的View        if (totalItemCount == MaxDateNum + 1) {            lv.removeFooterView(moreView);            Toast.makeText(this, "数据全部加载完成，没有更多数据！", Toast.LENGTH_LONG).show();        }

    }

    @Overridepublic void onScrollStateChanged(AbsListView view, int scrollState) {// 滑到底部后自动加载，判断listview已经停止滚动并且最后可视的条目等于adapter的条目        if (scrollState == OnScrollListener.SCROLL_STATE_IDLE                && lastVisibleIndex == mSimpleAdapter.getCount()) {// 当滑到底部时自动加载// pg.setVisibility(View.VISIBLE);// bt.setVisibility(View.GONE);// handler.postDelayed(new Runnable() {//// @Override// public void run() {// loadMoreDate();// bt.setVisibility(View.VISIBLE);// pg.setVisibility(View.GONE);// mSimpleAdapter.notifyDataSetChanged();// }//// }, 2000);

        }

    }

}