ListView就是可以显示一行行Item的控件，有时候数据非常多，通常需要分页显示，但为了减少用户的输入，我们可以动态更新ListView，把下一页要显示的数据的添加到当前ListView中。 先看看效果：     需要注意的是在什么时候去更新数据 ，listVIew的setOnScrollListener监听是否滚到了最后一条记录，     取到的数据加到list中，最后记得调用adapter的notifyDataSetChanged，通知listview改变。     不废话，上代码。     主文件：     view plain import java.util.ArrayList;  import java.util.List;  import android.app.Activity;  import android.os.AsyncTask;  import android.os.Bundle;  import android.widget.AbsListView;  import android.widget.AbsListView.OnScrollListener;  import android.widget.ListView;  import android.widget.Toast;  public class ListViewActivity extends Activity {  private ListView listView;  //定义适配器              private ListItemAdapter listadpter;  //定义每一页显示行数              private int VIEW_COUNT = 20;  //定义的页数              private int index = 0;  //当前页              private int currentPage = 1;  //所以数据的条数              private int totalCount;  //每次取的数据，只要最后一次可能不一样。              private int maxResult;  //泛型集合ArrayList              private ArrayList
     
       arrayList = new ArrayList
      
       ();  //数据操作的dao类              StudentsDAO dao = new StudentsDAO(ListViewActivity.this);  //实体bean              Students students = new Students();  // 标记：上次的ID                private boolean isUpdating = false;  /** Called when the activity is first created. */              @Override  public void onCreate(Bundle savedInstanceState) {  super.onCreate(savedInstanceState);                  setContentView(R.layout.main);  //初始化界面                  initView();  //插入100条记录。                  dao.insert();                  totalCount  = dao.getCount();                  maxResult = getMaxResult();  //调用dao里面的selectAll()方法                  arrayList = dao.getAllItems(index, maxResult);  //实例化适配器                  System.out.println("arrlist-->"+arrayList.size());                  listadpter = new ListItemAdapter(ListViewActivity.this,arrayList);  //填充适配器                  listView.setAdapter(listadpter);                  listView.setOnScrollListener(new OnScrollListener() {                      @Override  public void onScrollStateChanged(AbsListView view, int scrollState) {                      }                      @Override  public void onScroll(AbsListView view, int firstVisibleItem,  int visibleItemCount, int totalItemCount) {  if(firstVisibleItem + visibleItemCount == totalItemCount && !isUpdating){  if(totalItemCount
       
        > {                  @Override  protected List
        
          doInBackground(Void... params) {  // TODO Auto-generated method stub                      isUpdating = true;                      index += VIEW_COUNT;                      List
         
           list =new ArrayList
          
           (); list = dao.getAllItems(index, maxResult); return list; } @Override protected void onPostExecute(List
           
             result) { // TODO Auto-generated method stub super.onPostExecute(result); arrayList.addAll(result); listadpter.notifyDataSetChanged(); isUpdating = false; System.out.println("end update--------------"); } } private int getMaxResult(){ int totalPage = (totalCount+VIEW_COUNT-1)/VIEW_COUNT; return totalCount-(totalPage-1)*VIEW_COUNT; } } 数据库Dao文件： view plain package com.shao.list; import java.util.ArrayList; import java.util.Random; import android.content.ContentValues; import android.content.Context; import android.database.Cursor; import android.database.sqlite.SQLiteDatabase; import android.database.sqlite.SQLiteOpenHelper; public class StudentsDAO extends SQLiteOpenHelper { private final static String AUDIODATABASE_NAME = "student.db"; private final static String TABLE = "student"; private final static String COLUM_ID = "id"; private final static String COLUM_NAME = "name"; private final static String COLUM_AGE = "age"; private final static int DATABASE_VERSION = 1; private long row; private ArrayList
            
              arrayList; public StudentsDAO(Context context) { super(context, AUDIODATABASE_NAME, null, DATABASE_VERSION); // TODO Auto-generated constructor stub } @Override public void onCreate(SQLiteDatabase db) { // TODO Auto-generated method stub String sql = "CREATE TABLE " + TABLE + " (" + COLUM_ID + " INTEGER primary key autoincrement, " + " " + COLUM_NAME + " text, " + " " + COLUM_AGE + " int)"; db.execSQL(sql); } @Override public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { // TODO Auto-generated method stub String sql = "DROP TABLE IF EXISTS " + TABLE; db.execSQL(sql); } public long insert() { SQLiteDatabase db = getWritableDatabase(); ContentValues cv = new ContentValues(); Random random = new Random(); for(int i=1;i<=100;i++) { cv.put(COLUM_ID, i); cv.put(COLUM_NAME, "name"+String.valueOf(i)); cv.put(COLUM_AGE, random.nextInt(100)); row = db.insert(TABLE, null, cv); } db.close(); return row; } //查询记录的总数 public int getCount() { SQLiteDatabase db = getWritableDatabase(); String sql = "select count(*) from '"+TABLE+"'"; Cursor c = db.rawQuery(sql, null); c.moveToFirst(); int length = c.getInt(0); c.close(); db.close(); // System.out.println("length-->"+length); return length; } public ArrayList
             
               getAllItems(int firstResult, int maxResult) { arrayList=new ArrayList
              
               (); SQLiteDatabase db = getWritableDatabase(); String sql = "select * from '"+TABLE+"' limit ?,?"; Cursor cursor = db.rawQuery(sql, new String[]{String.valueOf(firstResult), String.valueOf(maxResult)}); if (cursor != null && cursor.getCount() > 0) { cursor.moveToFirst(); } for (cursor.moveToFirst(); !cursor.isAfterLast(); cursor.moveToNext()) { Students students=new Students(); students.setId(cursor.getInt(0)); students.setName(cursor.getString(1)); students.setAge(cursor.getInt(2)); arrayList.add(students); } cursor.close(); db.close(); return arrayList; } public ArrayList
               
                 selectAll() { arrayList=new ArrayList
                
                 (); SQLiteDatabase db = this.getWritableDatabase(); Cursor cursor = db.query(TABLE, null, null, null, null, null, null); if (cursor != null && cursor.getCount() > 0) { cursor.moveToFirst(); } for (cursor.moveToFirst(); !cursor.isAfterLast(); cursor.moveToNext()) { Students students=new Students(); students.setId(cursor.getInt(0)); students.setName(cursor.getString(1)); students.setAge(cursor.getInt(2)); arrayList.add(students); } cursor.close(); db.close(); return arrayList; } }