我有开始在启动一个AsyncTask的（通过服务调用）。在某些情况下，我想送一个通知，开始主要活动。我的问题是当我尝试调用：

I have an AsyncTask which starts on boot (called by a service). In some cases I would like to send a notification to start the main Activity. My problem comes when I try to call:

NotificationManager notManager = (NotificationManager) getSystemService(ns);

在这里日食表明了我一个错误，因为AsyncTask的还没有得到getSystemService方法。任何想法？

where eclipse shows me an error because AsyncTask hasn't got getSystemService method. Any idea?

感谢您。

推荐答案

由于getSystemService是Context类的方法。检查出来的这里。

Because getSystemService is a method of Context class. Check it out here.

在调用该函数，创建一个在您的AsyncTask一个上下文变量。然后，它在构造函数，即初始化。

Before you call the function, create a Context variable in your AsyncTask. Then initialize it in your constructor, i.e.

Context context;

public MyAsyncTask(Context contextin)
{ context = contextin;}

然后用这个上下文变量调用你的函数：

Then use this context variable to call your function:

NotificationManager notManager = (NotificationManager) context.getSystemService(ns);

当您正在执行的AsyncTask不要忘了输入上下文：

Do not forget to input your context when you are executing AsyncTask:

MyAsyncTask mytask = new MyAsyncTask(getApplicationContext());
mytask.execute();

我也有一种感觉，一种IntentService会更适合您的需求。

I also have a feeling that an IntentService would be more suitable for your needs.