android listview 分页显示 demo

package com.test.demo; import java.util.ArrayList; import java.util.List; import android.app.Activity; import android.content.Intent; import android.graphics.BitmapFactory; import android.os.Bundle; import android.widget.AbsListView; import android.widget.AbsListView.OnScrollListener; import android.widget.LinearLayout; import android.widget.ListView; import android.widget.Toast; import com.test.demo.tool.DataStation; import com.test.demo.tool.DownLoadImgTaskController; public class IndexActivity extends Activity { private ListView mListView = null; private ProductAdapter mAdapter = null; private final static int PAGE_SIZE = 12; //每页显示商品数量 private int mLastItem = 0; //当前显示的最后一项， 用于更新list后， 重新定位。 private int mTotalPage = 0; //总页数 private int mCurrentPageNum = 0; //当前的页数 private boolean mFootFlag = false; //判断是否到达最后一页。 private LinearLayout mFootViewLayout = null; private DataStation mDataStation = null; //图片存储类，单例模式 private List<Product> mProductsList = null; //所有商品存在这个list里，分页显示这里面的商品信息 private DownLoadImgTaskController mTaskController = null; //下载图片任务类 /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main_activity); mTaskController = DownLoadImgTaskController.getController(); this.initParam(); this.initAdapter(); this.initListView(); initProuctsList(); if(!mFootFlag && mTotalPage <= 1){ mListView.removeFooterView(mFootViewLayout); mFootFlag = true; } showNextPage(); } public void initParam(){ mDataStation = DataStation.getDataStation(); mDataStation.setDefaultBitmap(BitmapFactory.decodeResource(this.getResources(), R.drawable.icon)); } public void initAdapter(){ mAdapter = new ProductAdapter(this,mDataStation.getDefaultBitmap()); mTaskController.setAdapter(this, mAdapter); } private void initProuctsList(){ mProductsList = new ArrayList<Product>(); for(int i = 0;i < 62;i++){ Product product = new Product(); product.setProductID(i + ""); product.setProductImgPath("http://www.baidu.com/img/baidu_sylogo1.gif"); product.setProductName(" 资源名称 "+i); mDataStation.setBitmap(i+"", mDataStation.getDefaultBitmap()); mProductsList.add(product); } mCurrentPageNum = 1; int size = mProductsList.size(); if(size % PAGE_SIZE == 0){ mTotalPage = size / PAGE_SIZE; }else{ mTotalPage = size / PAGE_SIZE + 1; } } public void initListView(){ mListView = (ListView)findViewById(R.id.searchList); mFootViewLayout = UIFactory.createFootView(this); //addFooterView方法一定要在setAdapter方法之前执行 mListView.addFooterView(mFootViewLayout); mFootFlag = false; mListView.setAdapter(mAdapter); mListView.setOnScrollListener(new OnScrollListener() { public void onScrollStateChanged(AbsListView paramAbsListView, int paramInt) { if(mLastItem == mAdapter.getCount() && paramInt == SCROLL_STATE_IDLE){ mListView.postDelayed(new Runnable(){ public void run() { showNextPage(); }}, 1500); } } public void onScroll(AbsListView v, int firstVisibleItem, int visibleItemCount, int totalItemCount) { // Log.e("xxxx" , "firstVisibleItem: "+firstVisibleItem +" visibleItemCount: "+visibleItemCount +" totalItemCount: "+totalItemCount); mLastItem = firstVisibleItem + visibleItemCount - 1; } }); } private void showNextPage(){ List<Product> list = new ArrayList<Product>(); if(!mFootFlag && mCurrentPageNum == mTotalPage){ mListView.removeFooterView(mFootViewLayout); mFootFlag = true; } if(mCurrentPageNum > mTotalPage){ return; } if(mCurrentPageNum == mTotalPage){ list = mProductsList.subList((mCurrentPageNum - 1) * PAGE_SIZE, mProductsList.size()); }else{ list = mProductsList.subList((mCurrentPageNum - 1) * PAGE_SIZE, mCurrentPageNum * PAGE_SIZE); } mAdapter.addItemList(list); mAdapter.notifyDataSetChanged(); Toast.makeText(this, "第" + mCurrentPageNum++ + "页，总共" + mTotalPage + "页", Toast.LENGTH_SHORT).show(); mTaskController.setList(list); mTaskController.execute(); mListView.setSelection(mLastItem); } private Intent serviceIntent = null; private void startService() { serviceIntent = new Intent(this, OtherDownloadImageService.class); serviceIntent.putExtra("mag", 2); startService(serviceIntent); } @Override protected void onResume() { startService(); super.onResume(); } @Override protected void onStop() { super.onStop(); stopService(serviceIntent); } //Activity关闭的时候一定要停止所有下载图片线程 private void cancelAllTasks(){ mTaskController.clearTasks(); } public void onDestroy(){ super.onDestroy(); cancelAllTasks(); } }