java - AsyncTask 中的新线程

Question

我刚刚开始使用线程，所以我有一个问题。在这种情况下，当我从 doInBackground() 调用 initOctoshape() 方法时，为什么会创建一个新线程(与后台线程不同)？谢谢!

public class PlayerActivity extends CustomActivity implements 
                                          ProblemListener{

 public class PlayChannel extends AsyncTask<Channel, String, String> {
     Channel channel; 
     PlayerActivity thisActivity;

      @Override
      protected String doInBackground(Channel... params) {
             Thread.currentThread().getName();
             channel=params[0];  
             thisActivity=channel.thisActivity;
             initOctoshapeSystem(thisActivity);

      return url;
      } 
 }


 public void initOctoshapeSystem(Activity thisActivity) {
       os = OctoStatic.create(thisActivity, thisActivity, null);
       os.setOctoshapeSystemListener(new OctoshapeSystemListener() {
            @Override
            public void onConnect() {
                 Thread.currentThread().getName();
                 mStreamPlayer = setupStream(OCTOLINK);
                 mStreamPlayer.requestPlay();
            }
      });
 }

 public StreamPlayer setupStream(final String stream) {
    StreamPlayer sp = os.createStreamPlayer(stream);
    sp.setListener(new StreamPlayerListener() {
        @Override
        public void gotUrl(String url) {
        }
    });
 return sp;
 }
}

Answer 1

AsyncTask 的 doInBackground(Params...) 方法始终在后台线程上执行，并且由于您调用了 initOctoshapeSystem(thisActivity); 从这个方法中，它也将在此后台线程上执行。这就是 AsyncTask 的行为。

所以，

a new thread (different from the background thread) gets created when I call the method initOctoshape() from doInBackground()

不正确。您对 initOctoshape() 的调用仅遵循驱动 doInBackground() 的线程。