如何从活动传递数据，而无需启动一个新的实例来服务？ [英] How to pass data from Activity to Service without starting a new instance?

问题描述

我使用的意图，演员等，并使用startService（意向），在将数据传递到服务没有问题。

I have no problem in passing data to a service using intent, extras, etc and using startService(intent)

Intent intent = new Intent();
intent.setClass(MainActivity.this, MediaPlayerService.class);
intent.setAction(MediaPlayerService.PLAY_PAUSE);

intent.putExtra("URI", URI);
intent.putExtra("TITLE", content.toString());
//PendingIntent.getService(MainActivity.this, 0, intent, 0);
startService(intent);

的问题是，该服务使用的MediaPlayer播放音乐背景服务。使用startService每次我担心它可能产卵多个玩家，最终我得到一个ANR（即使一切顺利运行）

The problem is that the service is a background service using MediaPlayer to play music. Using startService each time I'm afraid that it might be spawning multiple players, and eventually I get an ANR (even if everything is working smoothly)

所有我需要的是告诉MusicPlayerService玩一个新的轨道。有任何想法吗？正如你可以从code我也试过的PendingIntent看到（建议在网络上），但它似乎没有工作。

All I need is to tell the MusicPlayerService to play a new track. Any ideas? As you can see from the code I also tried PendingIntent (suggested on the net) but it didn't seem to work

谢谢！

推荐答案

解决了！
我检查，如果我这样做

Solved! I checked and if I did

public int onStartCommand(Intent intent, int flags, int startId) {
        super.onStartCommand(intent, flags, startId);
        Log.d(TAG,"super called "+startId);
...

我看到startId不断增加，并最终给予超时。通过调用解决

I saw startId was constantly increasing and giving timeouts eventually. Solved by calling

stopService(intent)
...
startService(intent)

这么简单，但这么多的头疼找到它了！

so simple and yet so many headaches to find it out!

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