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() {
        for (int i=0;i<20;i++){
            Map<String,Object> map=new HashMap<String,Object>();
            map.put("pic",R.mipmap.ic_launcher);
            map.put("txt","慕课网"+i);
            dataList.add(map);
        }
        return dataList;
    }

    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
        String text=listView.getItemAtPosition(position)+"";/*获得文本信息,pisition从0开始计数*/
        Toast.makeText(this,"position="+position+"text="+text,Toast.LENGTH_SHORT).show();
    }

 

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

 1  @Override
    public void onScrollStateChanged(AbsListView view, int scrollState) {
        switch (scrollState){
            case SCROLL_STATE_FLING:
                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");
                Map<String,Object> map= new HashMap<String,Object>();
                map.put("pic",R.mipmap.ic_launcher);
                map.put("txt","增加项");
                dataList.add(map);
                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*/
                break;
            case SCROLL_STATE_IDLE:
                Log.d("Main","视图停止滑动");
                break;
            case SCROLL_STATE_TOUCH_SCROLL:
                Log.d("Main","手指没有离开屏幕，视图正在滑动");
                break;
        }
    }

    @Override
    public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {

    }
}