随笔分类

1.滚动加载

 

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01	listView.setOnScrollListener(new OnScrollListener() {

02	//添加滚动条滚到最底部，加载余下的元素

03

@Override

04	public void onScrollStateChanged(AbsListView view, int scrollState) {

05	if (scrollState == OnScrollListener.SCROLL_STATE_IDLE) {

06	loadRemnantListItem();

07

}

08

}

09

@Override

10	public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {}

11

});

12

13

14	listView.setOnItemSelectedListener(new OnItemSelectedListener() {

15	//按键选择List中的item，焦点落在最下面的view上加载余下的item

16

@Override

17	public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {

18	if(footerView == view) {

19	loadRemnantListItem();

20	listView.setSelection(position - 1);

21

}

22

}

23

@Override

24	public void onNothingSelected(AdapterView<?> parent) {}

25

});

26

27	private void loadRemnantListItem() {//滚到加载余下的数据

28	//动态的改变listAdapter.getCount()的返回值

29	//使用Handler调用listAdapter.notifyDataSetChanged();更新数据

30

}

2.滚动翻页

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1	//listView监听器代码相同

2	private void loadRemnantListItem() {//滚到加载余下的数据

3	//重新listView.setAdapter(newsAdapter);

4	//使用Handler调用listAdapter.notifyDataSetChanged();更新数据

5

}