活动监听器 - Google云消息传递 - BroadcastReceiver [英] Activity Listener - Google Cloud Messaging - BroadcastReceiver

问题描述

我在我的android应用程序中实现了GCM，并且在接收消息时工作正常。
根据Google提供的示例，BroadcastReceiver设置在清单文件中。

我的问题如下：如果用户有应用程序打开并且我想更新该视图中的一些结果 - 这怎么做？我首先想到在BroadCastReceiver收到的任何事情上将此活动注册为监听者。然而，这必须是一个静态的监听器列表，因为BroadcastReceiver的一个新实例将被设置 - 但也许这不是这样做的。

这是我现在有的

  public class GCMBroadcastReceiver extends WakefulBroadcastReceiver {
 
 @Override 
 public void onReceive（Context context，Intent intent）{
 ComponentName comp = new ComponentName（context.getPackageName（），
 GCMIntentService.class.getName（））; 
 startWakefulService（context，（intent.setComponent（comp）））; 
 setResultCode（Activity.RESULT_OK）; 
} 
} 
 
 
 public class GCMIntentService extends IntentService {
 public static final int NOTIFICATION_ID = 1; 
 private NotificationManager mNotificationManager; 
 NotificationCompat.Builder构建器; 
 
 public GCMIntentService（）{
 super（GCMIntentService）; 
 
 
 @Override 
 protected void onHandleIntent（意图意图）{
 Bundle extras = intent.getExtras（）; 
 GoogleCloudMessaging gcm = GoogleCloudMessaging.getInstance（this）; 
字符串messageType = gcm.getMessageType（intent）; 
 $ b $ if if（！extras.isEmpty（））{
 if（GoogleCloudMessaging。
 MESSAGE_TYPE_MESSAGE.equals（messageType））{
 
 / ** How检查活动
 GameActivity是否正在运行，并因此发送一个
更新信号给它？如果没有运行，应该创建一个
通知。 
 ** / 
} 
} 
 GCMBroadcastReceiver.completeWakefulIntent（intent）; 
 
 
 
 
 
 
 
这是清单文件中的重要部分：
 
 
 < receiver 
 android：name =qwegcm.GCMBroadcastReceiver
 android：permission = com.google.android.c2dm.permission.SEND> 
< intent-filter> 
  
< category android：name =q.w/> 
< / intent-filter> 
< / receiver> 
 
< service android：name =q.w.e.gcm.GCMIntentService/> 
  
有什么建议？ 
 
 
谢谢！ / p> 
 
解决方案
有两种方法可以处理这个问题。    1。检查活动是否正在运行。 
  ActivityManager am =（ActivityManager）getSystemService（ACTIVITY_SERVICE）; 
列出< RunningTaskInfo> taskInfo = am.getRunningTasks（1）; 
 ComponentName componentInfo = taskInfo.get（0）.topActivity; 
 if（componentInfo.getPackageName（）。equalsIgnoreCase（com.yourpackagename））{
 // Activity正在运行
发送包含您在活动中注册的意图过滤器的广播
您想要更新的位置
} 
 else {
 //活动未运行
 //生成通知
} 
  
  2。使用 SendOrderedBroadcast 。 
 
 
 
  blog 会给你一个关于如何实现的想法。
 
I have implemented GCM in my android application and it's working fine with receiving messages.
The BroadcastReceiver is set up in the manifest-file according to the examples provided by Google.

My question is the following: If the user is having the application open and I want to update some results in that view - how can this be done? I was first thinking of registering this activity as a listener on whatever the BroadCastReceiver recieves. However, this must then be a static list of listeners, as a new instance of the BroadcastReceiver will be set up - but maybe this is not the way to do this.

This is what I currently have
        public class GCMBroadcastReceiver extends WakefulBroadcastReceiver  {

            @Override
            public void onReceive(Context context, Intent intent) {
                ComponentName comp = new ComponentName(context.getPackageName(),
                        GCMIntentService.class.getName());
                startWakefulService(context, (intent.setComponent(comp)));
                setResultCode(Activity.RESULT_OK);
            }
        }


        public class GCMIntentService extends IntentService {
            public static final int NOTIFICATION_ID = 1;
            private NotificationManager mNotificationManager;
            NotificationCompat.Builder builder;

            public GCMIntentService() {
                super("GCMIntentService");
            }

            @Override
            protected void onHandleIntent(Intent intent) {
                Bundle extras = intent.getExtras();
                GoogleCloudMessaging gcm = GoogleCloudMessaging.getInstance(this);
                String messageType = gcm.getMessageType(intent);

                if (!extras.isEmpty()) {
                   if (GoogleCloudMessaging.
                            MESSAGE_TYPE_MESSAGE.equals(messageType)) {

                     /** How to check if the activity 
GameActivity is running, and hence send an 
update signal to it? If it's not running a 
notification should be created.
    **/
                   }
                }
                GCMBroadcastReceiver.completeWakefulIntent(intent);
            }
        }
Here's the important part for this in the manifest-file:
       <receiver
            android:name="q.w.e.gcm.GCMBroadcastReceiver"
            android:permission="com.google.android.c2dm.permission.SEND" >
            <intent-filter>
                <action android:name="com.google.android.c2dm.intent.RECEIVE" />

                <category android:name="q.w" />
            </intent-filter>
        </receiver>

        <service android:name="q.w.e.gcm.GCMIntentService" />
Any advice?

Thanks!
解决方案
There are two ways to handle this.

1. Check if activity is running.
ActivityManager am = (ActivityManager) getSystemService(ACTIVITY_SERVICE);
List<RunningTaskInfo> taskInfo = am.getRunningTasks(1);
ComponentName componentInfo = taskInfo.get(0).topActivity;
if(componentInfo.getPackageName().equalsIgnoreCase("com.yourpackagename")){
    //Activity Running
    Send a broadcast with the intent-filter which you register in your activity
    where you want to have the updates
} 
else{
    //Activity Not Running
    //Generate Notification
}
2. Using SendOrderedBroadcast. 

This blog will give you an idea on how this could be achieved.

                        
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