ListView 实现像Android Market那样 分页加载 滚动加载

 最近几天研究ListView实现分页加载和滚动加载,发现可以用listView的OnScroll方法来实现,直接上代码

ListViewScroll.java

package zy.lucifer.ListViewScroll;import android.app.Activity;import android.os.Bundle;import android.util.Log;import android.view.Gravity;import android.view.View;import android.view.ViewGroup;import android.widget.AbsListView;import android.widget.BaseAdapter;import android.widget.LinearLayout;import android.widget.ListView;import android.widget.ProgressBar;import android.widget.TextView;import android.widget.Toast;import android.widget.AbsListView.OnScrollListener;import android.widget.LinearLayout.LayoutParams;public class ListViewScroll extends Activity {/** Called when the activity is first created. */private LayoutParams mLayoutParams = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT,LinearLayout.LayoutParams.WRAP_CONTENT);/** * 设置布局显示目标最大化属性 */private LayoutParams FFlayoutParams = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.FILL_PARENT,LinearLayout.LayoutParams.FILL_PARENT);ListView listView ;private int lastItem = 0;LinearLayout loadingLayout;private listViewAdapter adapter;@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);listView = (ListView) findViewById(R.id.myList);Log.i("test", "onCreate(Bundle savedInstanceState)>>>>>>>>>>>>>>>");// 线性布局LinearLayout layout = new LinearLayout(this);// 设置布局 水平方向layout.setOrientation(LinearLayout.HORIZONTAL);// 进度条ProgressBar progressBar = new ProgressBar(this);// 进度条显示位置progressBar.setPadding(0, 0, 15, 0);// 把进度条加入到layout中layout.addView(progressBar, mLayoutParams);// 文本内容TextView textView = new TextView(this);textView.setText("加载中...");textView.setGravity(Gravity.CENTER_VERTICAL);// 把文本加入到layout中layout.addView(textView, FFlayoutParams);// 设置layout的重力方向，即对齐方式是layout.setGravity(Gravity.CENTER);// 设置ListView的页脚layoutloadingLayout = new LinearLayout(this);loadingLayout.addView(layout, mLayoutParams);loadingLayout.setGravity(Gravity.CENTER);listView.addFooterView(loadingLayout);adapter = new listViewAdapter();listView.setAdapter(adapter);listView.setOnScrollListener(new OnScrollListener() { @Overridepublic void onScroll(AbsListView view, int firstVisibleItem,int visibleItemCount, int totalItemCount) {// TODO Auto-generated method stubLog.i("test" , "Scroll>>>first: " + firstVisibleItem + ", visible: " + visibleItemCount + ", total: " + totalItemCount);lastItem = firstVisibleItem + visibleItemCount - 1;Log.i("test" , "Scroll>>>lastItem:" + lastItem);//显示50条ListItem，即0-49，因为onScroll是在“滑动”执行过之后才触发，所以用adapter.count<=41作条件int scrolllength=101;if (adapter.count<=scrolllength) {if (firstVisibleItem+visibleItemCount==totalItemCount) {adapter.count += 10;adapter.notifyDataSetChanged();listView.setSelection(lastItem);int currentPage=adapter.count/10;Toast.makeText(getApplicationContext(), "第"+currentPage+"页", Toast.LENGTH_LONG).show();}}else { listView.removeFooterView(loadingLayout); }}@Overridepublic void onScrollStateChanged(AbsListView view, int scrollState) {// TODO Auto-generated method stub}});}class listViewAdapter extends BaseAdapter {int count = 10; /* starting amount */public int getCount() {return count;}public Object getItem(int pos) {return pos;}public long getItemId(int pos) {return pos;}public View getView(int pos, View v, ViewGroup p) {Log.i("test", "getView>>>pos:" + pos);TextView view;if (v == null) {view = new TextView(ListViewScroll.this);} else {view = (TextView) v;}view.setText("ListItem " + pos);view.setTextSize(20f);view.setGravity(Gravity.CENTER);view.setHeight(60);return view;}}}

main.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" ><ListView android:cacheColorHint="#00000000" android:id="@+id/myList"android:layout_width="fill_parent" android:layout_height="fill_parent"></ListView></LinearLayout> 

效果图如下

 

由于是本地的内容，所以看不到下面的转圈圈的等待，如果做耗时操作，例如下载图片什么的，则可以实现

enjoy~!

 

 

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