Android的ListView分页功能

一、功能分析----ListView“加载更多”,功能如下图所示:

这个效果是当你上拉拖动页面时（注意有区别于下拉刷新），页面提示正在加载，2秒后显示留言更多内容；具体功能知道那我就来讲解下如何实现这个功能。

二、创建自定义ListView及其底部布局footer

①首先做一个加载提示布局，布局footer_layout如下图：

②将布局添加至ListView，自定义一个ListView

<?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"
    android:layout_marginTop="2dp"
    android:layout_marginBottom="2dp"
    android:layout_marginLeft="2dp"
    android:layout_marginRight="2dp"
    android:background="@drawable/edit_normal">
    <com.mg.message.view.LX_LoadListView
        android:id="@+id/list_content"
        android:layout_width="match_parent"
        android:background="@drawable/edit_normal"
        android:layout_height="0dip"
        android:focusable="true"
        android:layout_weight="1.20" >
    </com.mg.message.view.LX_LoadListView>
</LinearLayout>

package com.mg.message.ui;

import java.util.ArrayList;
import java.util.List;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemLongClickListener;
import android.widget.AdapterView.OnItemClickListener;
import com.mg.core.base.BaseActivity;
import com.mg.core.net.OperateCode;
import com.mg.core.net.ThreadMessage;
import com.mg.message.R;
import com.mg.message.data.GetMessageData;
import com.mg.message.domain.Message;
import com.mg.message.ui.adapter.ContentAdapter;
import com.mg.message.utils.ViewUtil;
import com.mg.message.view.LX_LoadListView;
import com.mg.message.view.LX_LoadListView.ILoadListener;
/* * 获得留言*/
public class LX_GetContentActivity extends BaseActivity implements ILoadListener
{
    private LX_LoadListView listView;
    private List<Message> totalMessages=new ArrayList<Message>();
    private static ContentAdapter myAdapter;
    private int totalSize;
    List<Message> messages=new ArrayList<Message>();
    @Override
    protected void initEvents()
    {
        listView.setOnItemClickListener(new OnItemClickListener() //进入删除页
        {
            @Override
            public void onItemClick(AdapterView<?> arg0, View arg1, int position,
                    long arg3)
            {
                Bundle bundle = new Bundle(); //传递多参数时使用Bundle
                bundle.putString("ID", messages.get(position).getID());
                bundle.putString("UContent", messages.get(position).getContent().toString());
                bundle.putString("UTime", messages.get(position).getCreateTime());
                   startCOActivity(LX_DeleteActivity.class,bundle);
                   finish();
            }
        });
        //修改留言
        listView.setOnItemLongClickListener(new OnItemLongClickListener()
        {
            @Override
            public boolean onItemLongClick(AdapterView<?> arg0, View arg1,
                    int position, long arg3) {
                Bundle bundle = new Bundle(); //传递多参数时使用Bundle
                bundle.putString("ID", messages.get(position).getID());
                   startCOActivity(LX_AddMessageActivity.class,bundle);
                   finish();
                return false;
            }
        });
    }

    @Override
    protected void initViews()
    {
        setContentView(R.layout.lx_get_content_activity);
        mTopBar.setVisibility(View.VISIBLE);
        mTopBar.SetTvName("查看留言");
        listView=(LX_LoadListView)findViewById(R.id.list_content);
        listView.setInterface(this);
          myAdapter=new ContentAdapter(messages);
          listView.setAdapter(myAdapter);
    }
    @Override
    protected void onResume() {
        super.onResume();
        showToast("onResume", false);
        sendToBackgroud(OperateCode.i_getMessageInfo);
    }
    @Override
    protected void receiveRequest(ThreadMessage threadMessage)
    {
        hideProgressDialog();
        OperateCode operateCode = threadMessage.getOperateCode();
        List<Message> messageList;
        switch (operateCode)
        {  //查看留言
            case i_getMessageInfo:
                messageList=GetMessageData.getMessagesList();
                if(ViewUtil.isNotEmpty(messageList))
                {
                    totalMessages.clear();
                    messages.clear();
                    totalMessages.addAll(messageList);
                    totalSize=totalMessages.size();
                    getData();
                    myAdapter.notifyDataSetChanged();
                }
                break;
            default:
                break;
        }
    }
    //listview初始化条数
    private void  getData()
    {
        try {
            if (totalSize<9) {
                messages.addAll(GetMessageData.getMessagesList());
                showToast("留言小于9加载完毕", false);
            }
            else {
                messages.addAll(GetMessageData.getMessagesList().subList(0, 8));
            }
        }
        catch (Exception e) {
        }
    }
    //加载数据
    private void getLoadData()
    {
        int lastsize=totalSize-messages.size();
        if(messages.size()<totalSize)
        {
            if (lastsize<5) {
                messages.clear();
                messages.addAll(GetMessageData.getMessagesList());
                showToast("加载项<5加载完毕", false);
            }
            else {
                messages.addAll(totalMessages.subList(messages.size(), messages.size()+5));
            }
        }       
        else
        {
            messages.clear();
            messages.addAll(GetMessageData.getMessagesList());
            showToast("全部加载完毕", false);
        }
        myAdapter.notifyDataSetChanged();
    }
    @Override
    public void onLoad()
    {
        android.os.Handler handler=new android.os.Handler();
        handler.postDelayed(new Runnable()
        {
            @Override
            public void run() {
                getLoadData();//获取更多数据
                listView.loadComplete();//通知listview加载完毕
            }
        }, 2000);
    }
}