用户友好体验之ListView分页

先贴上操作画面。其中最后一个条目是下列三者中其一。

  <string name="record_tips_next">下载另外20条</string>
 <string name="record_tips_eof">资料下载完毕</string>
 <string name="record_tips_none">暂无新闻</string>

完成分页需要作如下:

• 设计ViewHolder,  Adapter

• 异步从Server获取数据(using AsyncTask)

• 更新Adapter

private void updateAdapter() {
		if(!_newsList.isEmpty()) {
			_newsList.clear();
		}
		

		
		long id =  START_ID  + _newsList.size();
		for(int index = 0, listSize = _newsTitleList == null? 0 : _newsTitleList.length; index < listSize; index++) {
			    id  += index;
			    CommonViewHolder viewHolder = new CommonViewHolder();
				viewHolder.id = id;
				viewHolder.text = new TextView(this);
				viewHolder.text.setText(_newsTitleList[index]);
				viewHolder.sign = new ImageView(this);
				_newsList.add(viewHolder);
		}
			
		if(_listView.getAdapter() == null ||  _listView.getAdapter() .getCount() < 1) {
			_newsAdapter = new CommonListItemAdapter(   LayoutInflater.from(this) , _newsList);
			_listView.setAdapter(_newsAdapter);
		}
		else {
			_newsAdapter.notifyDataSetChanged();
		}
		
		
		_listView.setOnItemClickListener( new  OnItemClickListener() {
			@Override
			public void onItemClick(AdapterView<?> parent, View view,
					int position, long id) {
					
					if(position != -1) {
						  new FetchNewsCategoryContent().execute(_newsIdList[position], _newsTitleList[position]);
					}
			}

		});
		
		
		
	}

评论

1 楼 娴静女生 2010-11-07  

专为港版开发的？