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;}@Overridepublic 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

//handlerprivate Handler mHandler = new Handler(){@Overridepublic 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;}@Overridepublic 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

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