OnItemClickListener,OnScrollListener应用

OnItemClickListener：处理视图中单个条目的点击事件

OnScrollListener:监听滚动的变化，可以用于视图在滚动中加载数据

OnItemClickListener：实现AdapterView.OnItemClickListener接口，别忘记在MainActivity中调用listView.setOnItemClickListener(this);



 1  private List<Map<String, Object>> getDataList() {
 2         for (int i=0;i<20;i++){
 3             Map<String,Object> map=new HashMap<String,Object>();
 4             map.put("pic",R.mipmap.ic_launcher);
 5             map.put("txt","慕课网"+i);
 6             dataList.add(map);
 7         }
 8         return dataList;
 9     }
10 
11     @Override
12     public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
13         String text=listView.getItemAtPosition(position)+"";/*获得文本信息,pisition从0开始计数*/
14         Toast.makeText(this,"position="+position+"text="+text,Toast.LENGTH_SHORT).show();
15     }

OnScrollListener：实现AbsListView.OnScrollListener接口，别忘记在MainActivity中调用listView.setOnScrollListener(this);


 1  @Override
 2     public void onScrollStateChanged(AbsListView view, int scrollState) {
 3         switch (scrollState){
 4             case SCROLL_STATE_FLING:
 5                 Log.d("Main","用户在手指离开屏幕之前，由于用力滑一下，视图仍然以惯性继续滑动");
 6                 Map<String,Object> map= new HashMap<String,Object>();
 7                 map.put("pic",R.mipmap.ic_launcher);
 8                 map.put("txt","增加项");
 9                 dataList.add(map);
10                 simpleAdapter.notifyDataSetChanged();/*适配器通知ui线程进行刷新,数据刷新，可以动态的更新视图中所包含的数据*/
11                 break;
12             case SCROLL_STATE_IDLE:
13                 Log.d("Main","视图停止滑动");
14                 break;
15             case SCROLL_STATE_TOUCH_SCROLL:
16                 Log.d("Main","手指没有离开屏幕，视图正在滑动");
17                 break;
18         }
19     }
20 
21     @Override
22     public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
23 
24     }
25 }