make sure the content of your adapter is not modified from a background thread . but only from the
来源:互联网 发布:php好找工作吗2017 编辑:程序博客网 时间:2024/05/13 02:02
很多新手在Android开发时可能对Thread和Message以及Handler、Looper概念不是很清楚,可能产生类似 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.的错误。在这里给出以下几点可以帮助你了解该问题:
1.改变适配器Adapter内容时不要在后台线程中,必须在UI线程中处理,这点可以通过Handler传出来解决。
2.尝试Adapter的notifyDataSetChanged()方法,当然主要看你代码的具体情况。
以上只貌似只是把错误信息翻译过来而已,真正的原因请看源代码:
mItemCount = mAdapter == null ? 0 : mAdapter.getCount();
..... //中间是其他代码就不拷贝了
else if (mItemCount != mAdapter.getCount()) {//这里可以看出为什么会抛出adapter has changed,是因为你可能还有线程在跑,更新了mAdapter.getCount();的返回值
throw new 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(" + getId() + ", " + getClass()
+ ") with Adapter(" + mAdapter.getClass() + ")]");
============
ps:知其然,知其所以然。刚开始我发现写不写notifyDataSetChanged()都能实现效果,于是我就把它注释了,直到出了问题,我看了以上内容,我就明白为什么会有adapter has changed的提示,也明白了notifyDataSetChanged()的含义。
我的理解是:增加了内容长度改变了 但是没有通知更新 当选中增加的那个内容时 就造成了 数组越界(或者别的问题)
所以添加内容后要更新。
1.改变适配器Adapter内容时不要在后台线程中,必须在UI线程中处理,这点可以通过Handler传出来解决。
2.尝试Adapter的notifyDataSetChanged()方法,当然主要看你代码的具体情况。
以上只貌似只是把错误信息翻译过来而已,真正的原因请看源代码:
mItemCount = mAdapter == null ? 0 : mAdapter.getCount();
..... //中间是其他代码就不拷贝了
else if (mItemCount != mAdapter.getCount()) {//这里可以看出为什么会抛出adapter has changed,是因为你可能还有线程在跑,更新了mAdapter.getCount();的返回值
throw new 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(" + getId() + ", " + getClass()
+ ") with Adapter(" + mAdapter.getClass() + ")]");
============
ps:知其然,知其所以然。刚开始我发现写不写notifyDataSetChanged()都能实现效果,于是我就把它注释了,直到出了问题,我看了以上内容,我就明白为什么会有adapter has changed的提示,也明白了notifyDataSetChanged()的含义。
我的理解是:增加了内容长度改变了 但是没有通知更新 当选中增加的那个内容时 就造成了 数组越界(或者别的问题)
所以添加内容后要更新。
- Make sure the content of your adapter is not modified from a background thread, but only from the UI
- make sure the content of your adapter is not modified from a background thread . but only from the
- make sure the content of your adapter is not modified from a background thread . but only from the
- make sure the content of your adapter is not modified from a background thread . but only from the
- java.lang.IllegalStateException:Make sure the content of your adapter is not modified from a backgro
- The content of the adapter has changed but ListView did not receive a notification make sure the con
- The content of the adapter has changed but ListView did not receive a notification. Make sure the co
- The content of the adapter has changed but ListView did not receive a notification. Make sure the co
- Adapter报错:The content of the adapter has changed but ListView did not receive a
- Adapter报错:The content of the adapter has changed but ListView did not receive a
- Adapter报错:The content of the adapter has changed but ListView did not receive a
- The content of the adapter has changed but ListView did not receive a notification.
- The content of the adapter has changed but ListView did not receive a notification
- 解决bug:The content of the adapter has changed but ListView did not receive a notification
- The content of the adapter has changed but ListView did not receive a notification
- .IllegalStateException:The content of the adapter has changed but ListView did not receive a notific
- The content of the adapter has changed but ListView did not receive a notification.
- The content of the adapter has changed but ListView did not receive a notification
- MySQL索引类型一览 让MySQL高效运行起来
- ORACLE 9I数据库EXP排除部分表导出
- 转载CTreeCtrl的SortChildrenCB的用法,用于个性化排序
- 一些好的java学习网站
- VS 2005 调试过程中不定期出现 ”试图运行项目时出错:无法启动调试。拒绝调试”的对话框的解决方法
- make sure the content of your adapter is not modified from a background thread . but only from the
- NSBundle
- ASP与SQL数据库连接及SQL常用命令使用方法
- Change Organization列表中找不到对应的Org
- 删除页眉页脚中横线的方法
- dhtmlx touch
- Handler的另外一种用法(HandlerThread)
- 使用免费sqlmap工具抵御SQL注入攻击
- 2012-05-17