除了LocalBroadcastManager，事件总线和信使已经回答了这个问题，我们可以使用未决意图从服务通信。

正如我在博客中提到的

Communication between service and Activity can be done using PendingIntent.For that we can use createPendingResult().createPendingResult() creates a new PendingIntent object which you can hand to service to use and to send result data back to your activity inside onActivityResult(int, int, Intent) callback.Since a PendingIntent is Parcelable , and can therefore be put into an Intent extra,your activity can pass this PendingIntent to the service.The service, in turn, can call send() method on the PendingIntent to notify the activity via onActivityResult of an event. Activity public class PendingIntentActivity extends AppCompatActivity { @Override protected void onCreate(@Nullable Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); PendingIntent pendingResult = createPendingResult( 100, new Intent(), 0); Intent intent = new Intent(getApplicationContext(), PendingIntentService.class); intent.putExtra("pendingIntent", pendingResult); startService(intent); } @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { if (requestCode == 100 && resultCode==200) { Toast.makeText(this,data.getStringExtra("name"),Toast.LENGTH_LONG).show(); } super.onActivityResult(requestCode, resultCode, data); } } Service public class PendingIntentService extends Service { private static final String[] items= { "lorem", "ipsum", "dolor", "sit", "amet", "consectetuer", "adipiscing", "elit", "morbi", "vel", "ligula", "vitae", "arcu", "aliquet", "mollis", "etiam", "vel", "erat", "placerat", "ante", "porttitor", "sodales", "pellentesque", "augue", "purus" }; private PendingIntent data; @Override public void onCreate() { super.onCreate(); } @Override public int onStartCommand(Intent intent, int flags, int startId) { data = intent.getParcelableExtra("pendingIntent"); new LoadWordsThread().start(); return START_NOT_STICKY; } @Override public IBinder onBind(Intent intent) { return null; } @Override public void onDestroy() { super.onDestroy(); } class LoadWordsThread extends Thread { @Override public void run() { for (String item : items) { if (!isInterrupted()) { Intent result = new Intent(); result.putExtra("name", item); try { data.send(PendingIntentService.this,200,result); } catch (PendingIntent.CanceledException e) { e.printStackTrace(); } SystemClock.sleep(400); } } } } }

除了LocalBroadcastManager，事件总线和信使已经回答了这个问题，我们可以使用未决意图从服务通信。

正如我在博客中提到的

Communication between service and Activity can be done using PendingIntent.For that we can use createPendingResult().createPendingResult() creates a new PendingIntent object which you can hand to service to use and to send result data back to your activity inside onActivityResult(int, int, Intent) callback.Since a PendingIntent is Parcelable , and can therefore be put into an Intent extra,your activity can pass this PendingIntent to the service.The service, in turn, can call send() method on the PendingIntent to notify the activity via onActivityResult of an event. Activity public class PendingIntentActivity extends AppCompatActivity { @Override protected void onCreate(@Nullable Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); PendingIntent pendingResult = createPendingResult( 100, new Intent(), 0); Intent intent = new Intent(getApplicationContext(), PendingIntentService.class); intent.putExtra("pendingIntent", pendingResult); startService(intent); } @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { if (requestCode == 100 && resultCode==200) { Toast.makeText(this,data.getStringExtra("name"),Toast.LENGTH_LONG).show(); } super.onActivityResult(requestCode, resultCode, data); } } Service public class PendingIntentService extends Service { private static final String[] items= { "lorem", "ipsum", "dolor", "sit", "amet", "consectetuer", "adipiscing", "elit", "morbi", "vel", "ligula", "vitae", "arcu", "aliquet", "mollis", "etiam", "vel", "erat", "placerat", "ante", "porttitor", "sodales", "pellentesque", "augue", "purus" }; private PendingIntent data; @Override public void onCreate() { super.onCreate(); } @Override public int onStartCommand(Intent intent, int flags, int startId) { data = intent.getParcelableExtra("pendingIntent"); new LoadWordsThread().start(); return START_NOT_STICKY; } @Override public IBinder onBind(Intent intent) { return null; } @Override public void onDestroy() { super.onDestroy(); } class LoadWordsThread extends Thread { @Override public void run() { for (String item : items) { if (!isInterrupted()) { Intent result = new Intent(); result.putExtra("name", item); try { data.send(PendingIntentService.this,200,result); } catch (PendingIntent.CanceledException e) { e.printStackTrace(); } SystemClock.sleep(400); } } } } }

我很惊讶没有人给奥托事件巴士库参考

http://square.github.io/otto/

我一直在我的android应用程序中使用这个功能，它可以无缝地工作。

另一种方法是通过活动和服务本身使用带有假模型类的观察者，实现MVC模式变化。我不知道这是否是最好的方法，但这种方法对我来说很有效。如果你需要一些例子，我会张贴一些东西。

你也可以像EventBus一样使用LiveData。

class MyService : LifecycleService() {
    companion object {
        val BUS = MutableLiveData<Any>()
    }

    override fun onStartCommand(intent: Intent, flags: Int, startId: Int): Int {
        super.onStartCommand(intent, flags, startId)

        val testItem : Object

        // expose your data
        if (BUS.hasActiveObservers()) {
            BUS.postValue(testItem)
        }

        return START_NOT_STICKY
    }
}

然后从您的活动中添加一个观察者。

MyService.BUS.observe(this, Observer {
    it?.let {
        // Do what you need to do here
    }
})

你可以从这个博客上读到更多。

使用LocalBroadcastManager注册一个接收器来监听本地服务在你的应用内发送的广播，参考如下:

http://developer.android.com/reference/android/support/v4/content/LocalBroadcastManager.html