Android 报错：has leaked window XXXXX that was originally added here

最近在AsyncTask的 onPreExecute方法中使用ProgressDialog发现报这个错误

                @Overrideprotected void onPreExecute() {// TODO Auto-generated method stubsuper.onPreExecute();progressDialog = new ProgressDialog(MainFragmentActivity.this);progressDialog.setMessage("请稍后...");progressDialog.show();}

到progressDialog.show();就会报这个错误，但是找了好久也不知道为什么报这个错，最后索性把

//progressDialog = new ProgressDialog(MainFragmentActivity.this);//progressDialog.setMessage("请稍后...");//progressDialog.show();

dialog给注释掉，直接执行doInBackground发现doInBackground中有错误。将doInBackground中的错误修改后就不报“has leaked window XXXXX that was originally added here”这个错误了，如果你也有这样的问题，不妨试试这种办法。