.Net程序員玩轉Android開發-ListView滾動事件

Android中的ListView 可以上下滑動，並且上下活動可以分頁加載數據，這一節我們看下ListView的滾動事件.

ListView的滾動事件主要通過setOnScrollListener監聽器來實現,主要包括兩個方法onScroll和onScrollStateChanged方法，onScrollStateChanged主要用來監聽滾動狀態

在滑動過程中向ListView添加數據 ，ListView滾動的時候主要有三個狀態，SCROLL_STATE_TOUCH_SCROLL ，SCROLL_STATE_FLING，SCROLL_STATE_IDLE

 lv.setOnItemClickListener(new OnItemClickListener() {   
		            @Override  
		            public void onItemClick(AdapterView arg0,View arg1, int arg2,   
		                    long arg3) {   
		               
		   
		            	TextView   tname= (TextView)arg1.findViewById(R.id.tvname);//名稱  
		            	TextView   tmodel= (TextView)arg1.findViewById(R.id.tvmodel);//規格 
		            	TextView   tprice= (TextView)arg1.findViewById(R.id.tvprice);//單價
		            	TextView   tcode= (TextView)arg1.findViewById(R.id.tvcode);//編碼
		    
		                Toast.makeText(getApplicationContext(),"當前商品 名稱:"+tname.getText()+",編碼:"+tcode.getText(),30).show();  

		            }   
		        });  
		      
		      lv.setOnScrollListener(new OnScrollListener(){

				@Override
				public void onScroll(AbsListView arg0, int arg1, int arg2,
						int arg3) {
					// TODO Auto-generated method stub
					
					
				}

				@Override
				public void onScrollStateChanged(AbsListView arg0, int arg1) {
					// TODO Auto-generated method stub 滾動狀態監聽器
					if(arg1==AbsListView.OnScrollListener.SCROLL_STATE_TOUCH_SCROLL)
					{
						//手指沒有離開屏幕，正在滑動
						Toast.makeText(getApplicationContext(),"手指沒有離開屏幕，正在滑動",30).show(); 
						
						Map map=new HashMap();  
			    		map.put("code","編碼:10");  
			    		map.put("name","名稱:Ipad"); 
			    		map.put("price","價格:22"); 
			    		map.put("model","單位:22"); 
			    		mapList.add(map); 
			    		//adp.notifyDataSetChanged();
			    		SimpleAdapter sAdapter = (SimpleAdapter)lv.getAdapter();   
			            sAdapter.notifyDataSetChanged();   

			    		
					}
					else if(arg1==AbsListView.OnScrollListener.SCROLL_STATE_FLING)
					{
						//手指離開屏幕之前，用力滑動了一下
						Toast.makeText(getApplicationContext(),"手指離開屏幕之前，用力滑動了一下",30).show();  
					}
					else if(arg1==AbsListView.OnScrollListener.SCROLL_STATE_IDLE)
					{
						 //停止滑動
						Toast.makeText(getApplicationContext(),"停止滑動",30).show();  
					}
					
				}
		    	  
		    	  
		      });