java.lang.IllegalStateException: The content of the adapter has changed but ListView..

错误日志：

02-21 14:54:28.928: E/AndroidRuntime(2846): FATAL EXCEPTION: main
02-21 14:54:28.928: E/AndroidRuntime(2846): 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(2131165196, class android.widget.ListView) with Adapter(class com.jovision.multiscreen.views.DeviceScanSelectDialog$DeviceAdapter)]

错误分析：

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.

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！

private class DeviceAdapter extends BaseAdapter {  

  

    private LayoutInflater inflater;  

    private ArrayList<Device> devices;  

  

    public DeviceAdapter() {  

        inflater = LayoutInflater.from(mContext);  

    }  

  

    @SuppressWarnings("unchecked")  

    public void setDeviceList(ArrayList<Device> list) {  

        if (list != null) {  

            devices = (ArrayList<Device>) list.clone();  

            notifyDataSetChanged();  

        }  

    }  

  

    public void clearDeviceList() {  

        if (devices != null) {  

            devices.clear();  

        }  

        notifyDataSetChanged();  

    }  

  

    @Override  

    public int getCount() {  

        return devices == null ? 0 : devices.size();  

    } 

相对于原来，做了两项改动：

1.将所有数据“完全”保存在adapter内部，即使有外部数据进入，也会用.clone()重新生成副本，保证了数据完全是由adapter维护的。

2.保证所有setDeviceList()/clearDeviceList()是从主线程里调用的，如何保证是从主线程中调用的呢：

　　a.调用Activity.runOnUIThread()方法；

　　b.使用Handler（其实这并不非常准确，因为Handler也可以运行在非UI线程）；

　　c.使用AsyncTask。