基本的原理和我的上一篇随笔“”差不多，代码里面有注释，这里就不废话了，直接上代码。

自定义的分页显示ListView——PagedListView.java代码如下：

1 public class PagedListView extends ListView implements OnScrollListener { 2     private View footer; // 底部布局 3     private LayoutInflater inflater; 4     private int totalItemCount; // 总的Item的数量 5     private int lastVisibleItemIndex; // 最后一个可见的Item的索引 6     private boolean isLoading; // 是否正在加载 7     private ListViewLoadListener listener; // 加载更多数据的回掉接口 8  9     public PagedListView(Context context) {10         this(context, null);11     }12 13     public PagedListView(Context context, AttributeSet attrs) {14         this(context, attrs, 0);15     }16 17     public PagedListView(Context context, AttributeSet attrs, int defStyleAttr) {18         super(context, attrs, defStyleAttr);19         initView(context);20     }21 22     // 加载底部布局到ListView中23     private void initView(Context context) {24         inflater = LayoutInflater.from(context);25         footer = inflater.inflate(R.layout.sideworks_layout_footer, null);26         footer.findViewById(R.id.control_layout_footer).setVisibility(View.GONE);27         this.addFooterView(footer);28         this.setOnScrollListener(this);29     }30 31     @Override32     public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {33         this.lastVisibleItemIndex = firstVisibleItem + visibleItemCount;34         this.totalItemCount = totalItemCount;35     }36 37     @Override38     public void onScrollStateChanged(AbsListView view, int scrollState) {39         if (totalItemCount == lastVisibleItemIndex && scrollState == SCROLL_STATE_IDLE) {40             if (!isLoading) {41                 isLoading = true;42                 footer.findViewById(R.id.control_layout_footer).setVisibility(View.VISIBLE);43                 listener.loadData(); // 调用接口中的回调方法进行数据更新44             }45         }46     }47 48     // 加载更多数据的回掉接口49     public interface ListViewLoadListener {50         public void loadData();51     }52 53     public void setListViewLoadInterface(ListViewLoadListener listener) {54         this.listener = listener;55     }56 57     // 数据加载完成之后，隐藏footer布局58     public void onLoadComplete() {59         isLoading = false;60         footer.findViewById(R.id.control_layout_footer).setVisibility(View.GONE);61     }62 }

底部布局sideworks_layout_footer.xml的代码如下：

1 
     
       4  5     
       6     
      
       15 16         
       20 21         
       27     
      28 29 
     

主页面布局activity_main.xml代码如下：

1 
     
       5  6     
      10 11 
     

主界面MainActivity.java代码如下：

1 public class MainActivity extends Activity implements ListViewLoadListener { 2     private PagedListView listView; 3     private ArrayAdapter
     
       listAdapter; 4     private List
      
        listData; 5  6     @Override 7     protected void onCreate(Bundle savedInstanceState) { 8         super.onCreate(savedInstanceState); 9         setContentView(R.layout.activity_main);10         initView();11     }12 13     private void initView() {14         listView = (PagedListView) findViewById(R.id.control_main_listview);15         listView.setListViewLoadInterface(this);16         listData = new ArrayList
       
        ();17         for (int i = 0; i < 10; i++) {18             listData.add("This is an initial data.");19         }20         listAdapter = new ArrayAdapter
        
         (MainActivity.this, android.R.layout.simple_expandable_list_item_1, listData);21         listView.setAdapter(listAdapter);22     }23 24     @Override25     public void loadData() {26         new Handler().postDelayed(new Runnable() {27             public void run() {28                 // 增加两条数据并通知ListView进行数据的更新29                 for (int i = 0; i < 2; i++) {30                     listData.add("This is a new data.");31                 }32                 listAdapter.notifyDataSetChanged();33                 listView.onLoadComplete();34             }35         }, 2000);36     }37 }