Activity 未收到来自服务的本地广播

Local broadcast from Service not received by Activity

我有一个 Activity,我在本地注册了一个 BroadcastReceiver,如下所示:

public class SomeActivity extends Activity{

    public static final String PERFORM_SOME_ACTION = "PERFORM_SOME_ACTION";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.some_activity_layout);

        .....
        .....

        IntentFilter filter = new IntentFilter();
        filter.addAction(PERFORM_SOME_ACTION);

        receiver = new BroadcastReceiver() {
            @Override
            public void onReceive(Context context, Intent intent) {
                // perform some action ...
            }
        };

        registerReceiver(receiver, filter);
    }

    .....
    .....
}

我有一个 Service,我从中广播了一个 Intent,如下所示:

@Override
public int onStartCommand(Intent intent, int flags, int startId) {        

    Intent i = new Intent(SomeActivity.PERFORM_SOME_ACTION);
    sendBroadcast(i);   /* Send global broadcast. */

    return START_STICKY;
}

这按预期工作。实现之后,我意识到本地广播更适合这种情况:

@Override
public int onStartCommand(Intent intent, int flags, int startId) {        

    Intent i = new Intent(SomeActivity.PERFORM_SOME_ACTION);
    LocalBroadcastManager.getInstance(this).sendBroadcast(i);   /* Send local broadcast. */

    return START_STICKY;
}

不幸的是,上述方案不起作用。每次都发送全局广播,而本地广播显然从来没有sent/received.

我在这里错过了什么?不能在两个不同的应用程序组件之间发送本地广播,例如两个单独的 Activity 或从 ServiceActivity?我做错了什么??

注:

根据 documentation,发送本地广播(intra-app 广播,其范围仅限于应用程序自己的组件)而不是全局广播(应用程序间 广播传输到每个phone) 上的单个应用程序,只要我们不需要广播在应用程序外部传播。这就是进行上述更改的原因。

What am I missing here?

使用LocalBroadcastManager注册本地广播,目前使用Activity的registerReceiver方法注册全局广播:

LocalBroadcastManager.getInstance(this).registerReceiver(receiver, filter);