Cannot execute task: the task has already been executed....

遇到如下异常是因为AsyncTask线程只能运行一次，而你当前却在多次运行某个AsyncTask线程

Cannot execute task: the task has already been executed (a task can be executed only once)....

解决方法：
将"task.execute(…) "换成“ new AsyncTask().execute(…)”; 你的task只能execute(…)一次，所以每次要更新的时候都是新建task去更新就好了。
问题解决，已测试验证！！！