我有一个应用程序，因为你不能在我使用 AsyncTask 的主线程上进行网络操作，所以问题是一旦我 execute() AsyncTask 然后我 finish() Activity ，也许用户会 finish() 整个应用程序，所以我是想知道的是:
AsyncTask是否会始终完成doInBackground()和onPostExecute()，即使应用程序已关闭，只要execute()在应用运行时被调用？
最佳答案
您将能够对此进行测试。是的，确实如此。如果调用了执行，您可以看到 Asynctask 仍将执行，除非它对前台或 UI 相关的操作。 (可能会导致启动器崩溃)。
但是，如果它靠近系统。它可能会或可能不会继续执行该方法。我已经测试并回答了here .
回复评论:
已测试:
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
new Worker().execute();
}
private class Worker extends AsyncTask<Void, Void, String> {
@Override
protected String doInBackground(Void... arg0) {
Log.i("SomeTag",
"start do in background at " + System.currentTimeMillis());
String data = null;
try {
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpGet httpGet = new HttpGet(
"https://stackoverflow.com/questions/tagged/android");
HttpResponse httpResponse = httpClient.execute(httpGet);
HttpEntity httpEntity = httpResponse.getEntity();
data = EntityUtils.toString(httpEntity);
Log.i("SomeTag",
"doInBackGround done at " + System.currentTimeMillis());
} catch (Exception e) {
}
return data;
}
@Override
protected void onPostExecute(String result) {
super.onPostExecute(result);
Log.i("SomeTag", System.currentTimeMillis() / 1000L
+ " post execute \n" + result);
}
}
@Override
protected void onDestroy() {
super.onDestroy();
Log.i("SomeTag", System.currentTimeMillis() / 1000L + " onDestory()");
}
04-24 21:42:57.981: I/SomeTag(5961): start do in background at 1366854177994
04-24 21:43:00.974: I/SomeTag(5961): 1366854180 onDestory()
04-24 21:43:02.946: I/SomeTag(5961): doInBackGround done at 1366854182946
04-24 21:43:02.946: I/SomeTag(5961): 1366854182 post execute
04-24 21:43:02.946: I/SomeTag(5961): <!DOCTYPE html>
04-24 21:43:02.946: I/SomeTag(5961): <html>
04-24 21:43:02.946: I/SomeTag(5961): <head>
04-24 21:43:02.946: I/SomeTag(5961):
04-24 21:43:02.946: I/SomeTag(5961): <title>Newest 'android' Questions - Stack Overflow</title>
04-24 21:43:02.946: I/SomeTag(5961): <link rel="shortcut icon" href="http://cdn.sstatic.net/stackoverflow/img/favicon.ico">
//....
关于android - 即使应用程序被销毁，AsyncTask 也将始终运行？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/16204693/