带有ASyncTask的Timer中的IllegalStateException

Question

我想每隔几分钟运行一次Background ASycTask.我创建了一个计时器,然后执行后台任务的.execute命令.我还创建了一个bool isChecking,它在BackgroundNotify运行时是真的.问题是我仍然收到以下错误:

01-26 15:09:32.871: E/AndroidRuntime(22332): FATAL EXCEPTION: Timer-0
01-26 15:09:32.871: E/AndroidRuntime(22332): java.lang.IllegalStateException: Cannot execute task: the task has already been executed (a task can be executed only once)
01-26 15:09:32.871: E/AndroidRuntime(22332):    at android.os.AsyncTask.executeOnExecutor(AsyncTask.java:578)
01-26 15:09:32.871: E/AndroidRuntime(22332):    at android.os.AsyncTask.execute(AsyncTask.java:534)
01-26 15:09:32.871: E/AndroidRuntime(22332):    at de.tecfriends.vbtsplash2013.MainActivity$2.run(MainActivity.java:61)
01-26 15:09:32.871: E/AndroidRuntime(22332):    at java.util.Timer$TimerImpl.run(Timer.java:284)

我究竟做错了什么？

Answer 1

AsyncTask只能执行一次.如果需要再次执行任务,请创建一个新实例,然后调用execute():

if (task.getStatus() == AsyncTask.Status.FINISHED) {
    task = new AsyncTask();
}

if (task.getStatus() != AsyncTask.Status.RUNNING) {
    task.execute();
}