如何为刷新上的活动的接收GCM推送通知如果我的应用程序是打开。我有一个包含列表视图充满了来自服务器的数据的活动。我想刷新我的活动（ 这里再增加一个项目的ListView 的），如果我收到GCM推送通知（其中还包含一些数据）。

How to refresh activity on receiving gcm push notification if my app is open. I have an activity which contains listview filled with data from the server. I want to refresh my activity (here adding one more item to listview) , if I receive gcm push notification(which also contains some data).

尊敬的评论者，请仔细阅读问题，我只需要为刷新列表（如果应用程序是开放的，特定的活动是开放的）的否则没有必要相同

Dear commentors, please read the question carefully, I only need to refresh the list (if app is open and that particular activity is open) else no need for same.

推荐答案

我花了几个小时才能弄明白。张贴在这里的任何人的情况下任何人有同样的问题。

Took me a few hours to figure it out. Posting here in case anyone anyone else has the same problem.

我们的想法是，你必须注册你的活动作为一个广播接收器。要做到这一点最简单的方法是像这样：

The idea is that you have to register your activity as a broadcast receiver. The easiest way to do this is like so:

//register your activity onResume()
@Override
public void onResume() {
    super.onResume();
    context .registerReceiver(mMessageReceiver, new IntentFilter("unique_name"));
}

//Must unregister onPause()
@Override
protected void onPause() {
    super.onPause();
    context.unregisterReceiver(mMessageReceiver);
}


//This is the handler that will manager to process the broadcast intent
private BroadcastReceiver mMessageReceiver = new BroadcastReceiver() {
    @Override
    public void onReceive(Context context, Intent intent) {

        // Extract data included in the Intent
        String message = intent.getStringExtra("message");

        //do other stuff here
    }
};

以上code进去要'听'事件的活动。

The above code goes in the activity that you want to 'listen' for events.

现在，我们如何将数据发送到这个监听器​​？转到您的推送通知处理（或要更新您的活动），当您收到通知调用这个函数：

Now, how do we send data to this 'listener'? Go to your push notification handler(or from where you want to update your activity) and when you receive a notification call this function:

// This function will create an intent. This intent must take as parameter the "unique_name" that you registered your activity with
static void updateMyActivity(Context context, String message) {

    Intent intent = new Intent("unique_name");

    //put whatever data you want to send, if any
    intent.putExtra("message", message);

    //send broadcast
    context.sendBroadcast(intent);
}

当你调用上面的函数，你的活动应该接受它。

When you call the above function, your activity should receive it.

注意：您的活动必须运行/打开接收广播意向

Note: Your activity must be running/open to receive the broadcast intent

注2 ：我切换到一个叫奥托库。它实际上做同样的事情，但更容易，'广播事件'thoughout应用程序。这里有一个链接 http://square.github.io/otto/

Note2: I switched to a library called 'otto'. It does actually the same thing but easier, 'broadcasts events' thoughout the app. Here's a link http://square.github.io/otto/