Question

我正在尝试从具有2个不同接收器的服务接收广播。一个接收器更新是一个视图，所以我在活动的onResume方法中注册它。

当应用程序不在前台时，我使用其他接收器，以便在后台服务完成时显示系统通知。

以下代码是我如何注册我的接收器：

@Override
protected void onPause() {
    // unregister local
    unregisterReceiver(localReceiver);

    // register remote
    registerReceiver(remoteReceiver, filter);
    super.onPause();
}

@Override
protected void onResume() {
    super.onResume();
    // remove remote receiver
    // since remote is only registered in onPause it won't be registered during the first onResume call
    // so we want to ignore any exceptions
    try {
        unregisterReceiver(remoteReceiver);
    } catch (IllegalArgumentException e) {
        Log.e(LOG_TAG, "No receiver registered, could be first time");
    }

    // add local receiver
    registerReceiver(localReceiver, filter);
    Log.i(LOG_TAG, "resumed. should be registered");
}

这两个接收者在Activity类的顶部实例化如下：

BroadcastReceiver localReceiver = new BroadcastReceiver() { ... };

WaitTimeReceiver remoteReceiver = new WaitTimeReceiver();

服务将意图设为：

broadcastIntent = new Intent(Support.SERVICE_BR);
broadcastIntent.addCategory(Intent.CATEGORY_DEFAULT);

// later on sends using
sendBroadcast(broadcastIntent);

活动中的过滤器匹配：

filter.addAction(Support.SERVICE_BR);
filter.addCategory(Intent.CATEGORY_DEFAULT);

以上所有工作暂停恢复功能都按预期工作，但我的问题是为什么LocalBroadcastManager不是？

使用LocalBroadcastManager lbm = LocalBroadcastManager.getInstance(this)然后拨打lbm.registerReceiver(localReceiver)并未收到我的任何广播。

为什么LocalBroadcastManager不接收我的任何广播？

Answer 1

在javascript:document.getElementsByClassName("arrow up login-required access-required").click();注册的

BroadcastReceiver只能接收与LocalBroadcastManager一起发送的广播。 LocalBroadcastManager接收方无法接收使用Activity或Service sendBroadcast()方法发送的广播。

请改用LocalBroadcastManager方法。例如：

LocalBroadcastManager#sendBroadcast()

Dynamic BroadcastReceivers：LocalBroadcastManager.registerReceiver vs registerReceiver

1 个答案: