android - SendBroadcast Intent 有 Null Extras

Question

我正在尝试使用 BroadcastReceiver 从 IntentService 向 Activity 发送消息。这是我在 IntentService 中的代码:

/**
 * Received a message from the Google GCM service.
 */
@Override
protected void onMessage(Context context, Intent intent) {

    Log.e(TAG, "Got a new message from GCM");

    // create the intent
    Intent broadcastIntent = new Intent(BROADCAST_NOTIFICATION);
    intent.putExtra("name", "Josh");
    intent.putExtra("broadcasting", true);
    sendBroadcast(broadcastIntent);
}

在 Activity 类中，我注册了一个接收器来监听这些消息:

private class IncomingTransmissionReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {

        // if we are looking at a broadcast notification
        if (intent.getAction().equals(GCMIntentService.BROADCAST_NOTIFICATION)) {

            // are we broadcasting?
            boolean broadcasting = intent.getBooleanExtra("broadcasting", false);

            // get the name of the person who is broadcasting
            String name = intent.getStringExtra("name");

            Log.e(TAG, "Got a message, broadcasting= "+ broadcasting + " name= " + name);
        }
    }
}

当我发送广播时，这是日志打印的内容:

收到消息，broadcasting= null name= null。

甚至 intent.getExtras().getString("name") 和 intent.getExtras().getBoolean("broadcasting") 也返回 null(intent.getExtras() 也返回 null)。

我做错了什么？为什么我的 intent extras 在我明显设置它们时为空？

Answer 1

你必须做的:

    // create the intent
    Intent broadcastIntent = new Intent(BROADCAST_NOTIFICATION);
    broadcastIntent.putExtra("name", "Josh");
    broadcastIntent.putExtra("broadcasting", true);
    sendBroadcast(broadcastIntent);