我更愿意全面地回答。

LocalbroadcastManager included in android 3.0 and above so you have to use support library v4 for early releases. see instructions here Create a broadcast receiver: private BroadcastReceiver onNotice= new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { // intent can contain anydata Log.d("sohail","onReceive called"); tv.setText("Broadcast received !"); } }; Register your receiver in onResume of activity like: protected void onResume() { super.onResume(); IntentFilter iff= new IntentFilter(MyIntentService.ACTION); LocalBroadcastManager.getInstance(this).registerReceiver(onNotice, iff); } //MyIntentService.ACTION is just a public static string defined in MyIntentService. unRegister receiver in onPause: protected void onPause() { super.onPause(); LocalBroadcastManager.getInstance(this).unregisterReceiver(onNotice); } Now whenever a localbroadcast is sent from applications' activity or service, onReceive of onNotice will be called :).

编辑:你可以在这里阅读完整的教程LocalBroadcastManager:内部应用程序消息传递

我还是要回答这个问题。以防有人需要。

ReceiverActivity.java

一个监视名为“custom-event-name”的事件通知的活动。

@Override
public void onCreate(Bundle savedInstanceState) {

  ...

  // Register to receive messages.
  // We are registering an observer (mMessageReceiver) to receive Intents
  // with actions named "custom-event-name".
  LocalBroadcastManager.getInstance(this).registerReceiver(mMessageReceiver,
      new IntentFilter("custom-event-name"));
}

// Our handler for received Intents. This will be called whenever an Intent
// with an action named "custom-event-name" is broadcasted.
private BroadcastReceiver mMessageReceiver = new BroadcastReceiver() {
  @Override
  public void onReceive(Context context, Intent intent) {
    // Get extra data included in the Intent
    String message = intent.getStringExtra("message");
    Log.d("receiver", "Got message: " + message);
  }
};

@Override
protected void onDestroy() {
  // Unregister since the activity is about to be closed.
  LocalBroadcastManager.getInstance(this).unregisterReceiver(mMessageReceiver);
  super.onDestroy();
}

SenderActivity.java

第二个活动发送/广播通知。

@Override
public void onCreate(Bundle savedInstanceState) {

  ...

  // Every time a button is clicked, we want to broadcast a notification.
  findViewById(R.id.button_send).setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
      sendMessage();
    }
  });
}

// Send an Intent with an action named "custom-event-name". The Intent sent should 
// be received by the ReceiverActivity.
private void sendMessage() {
  Log.d("sender", "Broadcasting message");
  Intent intent = new Intent("custom-event-name");
  // You can also include some extra data.
  intent.putExtra("message", "This is my message!");
  LocalBroadcastManager.getInstance(this).sendBroadcast(intent);
}

使用上面的代码，每次按钮都是R.id。button_send被点击，Intent被广播并被ReceiverActivity中的mMessageReceiver接收。

调试输出应该是这样的:

01-16 10:35:42.413: D/sender(356): Broadcasting message
01-16 10:35:42.421: D/receiver(356): Got message: This is my message! 

我们也可以使用接口相同的broadcastManger在这里我分享broadcastManager的测试代码，但通过接口。

首先，创建如下界面:

public interface MyInterface {
     void GetName(String name);
}

2-这是第一个需要实现的类

public class First implements MyInterface{

    MyInterface interfc;    
    public static void main(String[] args) {
      First f=new First();      
      Second s=new Second();
      f.initIterface(s);
      f.GetName("Paddy");
  }
  private void initIterface(MyInterface interfc){
    this.interfc=interfc;
  }
  public void GetName(String name) {
    System.out.println("first "+name);
    interfc.GetName(name);  
  }
}

3-这里是实现相同接口的第二个类，其方法自动调用

public class Second implements MyInterface{
   public void GetName(String name) {
     System.out.println("Second"+name);
   }
}

因此，通过这种方法，我们可以使用与broadcastManager功能相同的接口。

我是一名iOS开发者，所以我做了一个类似于NotificationCenter的解决方案:

object NotificationCenter {
    var observers: MutableMap<String, MutableList<NotificationObserver>> = mutableMapOf()

    fun addObserver(observer: NotificationObserver, notificationName: NotificationName) {
        var os = observers[notificationName.value]
        if (os == null) {
            os = mutableListOf<NotificationObserver>()
            observers[notificationName.value] = os
        }
        os.add(observer)
    }

    fun removeObserver(observer: NotificationObserver, notificationName: NotificationName) {
        val os = observers[notificationName.value]
        if (os != null) {
            os.remove(observer)
        }
    }

    fun removeObserver(observer:NotificationObserver) {
        observers.forEach { name, mutableList ->
            if (mutableList.contains(observer)) {
                mutableList.remove(observer)
            }
        }
    }

    fun postNotification(notificationName: NotificationName, obj: Any?) {
        val os = observers[notificationName.value]
        if (os != null) {
            os.forEach {observer ->
                observer.onNotification(notificationName,obj)
            }
        }
    }
}

interface NotificationObserver {
    fun onNotification(name: NotificationName,obj:Any?)
}

enum class NotificationName(val value: String) {
    onPlayerStatReceived("on player stat received"),
    ...
}

一些想要观察通知的类必须符合观察者协议:

class MainActivity : AppCompatActivity(), NotificationObserver {
    override fun onCreate(savedInstanceState: Bundle?) {
        ...
        NotificationCenter.addObserver(this,NotificationName.onPlayerStatReceived)
    }
    override fun onDestroy() {
        ...
        super.onDestroy()
        NotificationCenter.removeObserver(this)
    }

    ...
    override fun onNotification(name: NotificationName, obj: Any?) {
        when (name) {
            NotificationName.onPlayerStatReceived -> {
                Log.d(tag, "onPlayerStatReceived")
            }
            else -> Log.e(tag, "Notification not handled")
        }
    }

最后，向观察者发布一些通知:

NotificationCenter.postNotification(NotificationName.onPlayerStatReceived,null)

在Eclipse中，最终我不得不通过右键单击我的项目并选择添加兼容性/支持库:

Android工具->添加支持库

一旦添加了它，我就可以在代码中使用LocalBroadcastManager类了。

enter code here if (createSuccses){
                        val userDataChange=Intent(BRODCAST_USER_DATA_CHANGE)
                        LocalBroadcastManager.getInstance(this).sendBroadcast(
                            userDataChange
                        )
                        enableSpinner(false)
                        finish()