我们在做android list开发的时候，，有时候会遇到类似这样的问题：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. Make sure your adapter calls notifyDataSetChanged() when its content changes.意思大体是，你的adapter的内容变化了，但是你的ListView并不知情。请保证你adapter的数据在主线程中进行更改！
通过查询Android源码看看该Exception是从哪里抛出来的。在ListView的layoutChildren()方法里有如下一段方法：// Handle the empty set by removing all views that are visible// and calling it a dayif (mItemCount == 0) { resetList(); invokeOnItemScrollListener(); return;} else if (mItemCount != mAdapter.getCount()) { 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() + ")]");}
意思是：当ListView缓存的数据Count和ListView中Adapter.getCount()不等时，会抛出该异常。
知道了原因，改起来就好办多了。就是在你进行adapter内item进行增加、删除的时候，一定要同步进行notifyDataSetChanged()方法通知更新。并且同时在主线程中进行。这样这个问题就解决了！
就算是一辆永久单车也能让你的梦想走很远。
