Android 数据无限的List实现（滚动到底部，请求数据）

Josef

当ListView到达底部时，请求更多的数据。

One solution is to implement an OnScrollListener and make changes (like adding items, etc.) to the ListAdapter at a convenient state in its onScroll method.

The following ListActivity shows a list of integers, starting with 40, adding items when the user scrolls to the end of the list.

public class Test extends ListActivity implements OnScrollListener {   Aleph0 adapter = new Aleph0();   protected void onCreate(Bundle savedInstanceState) {     super.onCreate(savedInstanceState);     setListAdapter(adapter);     getListView().setOnScrollListener(this);   }   public void onScroll(AbsListView view,     int firstVisible, int visibleCount, int totalCount) {     boolean loadMore = /* maybe add a padding */       firstVisible + visibleCount >= totalCount;     if(loadMore) {       adapter.count += visibleCount; // or any other amount       adapter.notifyDataSetChanged();     }   }   public void onScrollStateChanged(AbsListView v, int s) { }     class Aleph0 extends BaseAdapter {     int count = 40; /* 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) {         TextView view = new TextView(Test.this);         view.setText("entry " + pos);         return view;     }   } }

You should obviously use separate threads for long running actions (like loading web-data) and might want to indicate progress in the last list item (like the market or gmail apps do).

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