2013.05.16——— android 关于listview的bug

2013.05.16——— android 关于listview的bug
参考：http://www.pocketdigi.com/20111018/548.html

错误信息

java.lang.IllegalStateException: The content of the adapter has changed but ListView did not receive a notification. Make sure the content of your adapter is not modified from a background thread, but only from the UI thread. [in ListView(2131165479, class com.wmyc.activity.com.listview.pulllistview.XListView) with Adapter(class com.wmyc.activity.com.listview.multicolumnlistview.internal.PLA_HeaderViewListAdapter)] mItemCount: 2, mAdapter.getCount(): 7

自认为代码没有写错 但是 如果 我切换activity速度非常快的话 基本上都会报这个错

我的代码如下：

private class LoadDataThread implements Runnable{
		private int type;
		public LoadDataThread(int type){
			this.type = type;
		}
		@Override
		public void run() {
			if(type==IXListViewListener.TYPE_REFRESH){
				mIndexShow = 0;
			}
			
			ArrayList<InfoCloth> list = mDaoCloth.getAllByPage(mIndexShow, mTagId);//分页加载数据
			
			switch(type){
			case IXListViewListener.TYPE_LOADMORE:
				mArrData.addAll(list);
				break;
			case IXListViewListener.TYPE_REFRESH:
				mArrData.clear();
				mArrData.addAll(list);
				break;
			}
			System.out.println("LoadDataThread");
			if(mArrData.size()==DBOpenHelper.PAGE_COUNT){//如果达到每页显示个数 就分页
				mIndexShow = mIndexShow+1;
			}
			System.out.println("1111111111");
			
			if(list.size() < DBOpenHelper.PAGE_COUNT){
				System.out.println("2222222222");
				mHandler.sendEmptyMessage(MSG_FOOTVIEWGONE);
			}
			System.out.println("33333333333");
	    	
			Message msg = new Message();
			msg.arg1 = type;
			msg.what = Constant.MSG_SUC;
	    	mHandler.sendMessage(msg);
	    	System.out.println("444444444444");
		}
		
	}

然后 我在handler里面 更新listview

//handler
	private Handler mHandler = new Handler(){

		@Override
		public void handleMessage(Message msg) {
			super.handleMessage(msg);
			if(_dialog!=null && _dialog.isShowing()){
				_dialog.dismiss();
			}
			switch(msg.what){
			case Constant.MSG_FAIL:
				break;
			case Constant.MSG_SUC:
				showData();
				break;
			}
		}
		
	};

这个就是我老是报错的代码 我在线程里面 更改了adapter绑定的数据，然后再handler里面 更新listview

搜了下，发现很多人都遇到这个问题

listView1.setVisibility(View.GONE);
listAdapter.notifyDataSetChanged();
listView1.setVisibility(View.VISIBLE);

说这样写可以解决 反正我这样写是没解决 可能我写的有问题吧


最后，我把ListView的添加，删除，清空等UI操作都用Handler来处理，上面的代码 稍微改下

private class LoadDataThread implements Runnable{
		private int type;
		public LoadDataThread(int type){
			this.type = type;
		}
		@Override
		public void run() {
			if(type==IXListViewListener.TYPE_REFRESH){
				mIndexShow = 0;
			}
			
			mArrDataTemp = mDaoCloth.getAllByPage(mIndexShow, mTagId);//分页加载数据
			
	    	
			Message msg = new Message();
			msg.arg1 = type;
			msg.what = Constant.MSG_SUC;
	    	mHandler.sendMessage(msg);
	    	System.out.println("444444444444");
		}
		
	}

新写一个临时的list集合 用于存储得到的数据

case Constant.MSG_SUC:
				switch( msg.arg1){
				case IXListViewListener.TYPE_LOADMORE:
					mArrData.addAll(mArrDataTemp);
					break;
				case IXListViewListener.TYPE_REFRESH:
					mArrData.clear();
					mArrData.addAll(mArrDataTemp);
					break;
				}
				System.out.println("LoadDataThread");
				if(mArrData.size()==DBOpenHelper.PAGE_COUNT){//如果达到每页显示个数 就分页
					mIndexShow = mIndexShow+1;
				}
				System.out.println("1111111111");
				
				if(mArrDataTemp.size() < DBOpenHelper.PAGE_COUNT){
					System.out.println("2222222222");
					mFallView.setPullLoadEnable(false);
				}
				showData();
				break;
			}

就这样 我大概测了下 暂时没再遇到这个问题