【问题标题】:Using GCM service in android在安卓中使用 GCM 服务
【发布时间】:2015-02-17 14:24:27
【问题描述】:

我在做什么:

  • 我正在使用推送通知来接收通知。
  • 我使用了下面的代码
  • 我还在清单中声明了必要的权限

发生了什么:

  • 我可以收到通知
  • 但是当新通知到来时,旧通知会被替换

我想做的事:

  • 说收到第一个通知
  • 当第二个通知到来时,不应替换旧通知 相反,两者都应该显示

GCMNotificationIntentService.java

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

    public GCMNotificationIntentService() {
        super("GcmIntentService");
    }

    public static final String TAG = "GCMNotificationIntentService";

    @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_SEND_ERROR.equals(messageType)) {
                //sendNotification("Send error: " + extras.toString());
            } else if (GoogleCloudMessaging.MESSAGE_TYPE_DELETED.equals(messageType)) {
                //sendNotification("Deleted messages on server: "+ extras.toString());
            } else if (GoogleCloudMessaging.MESSAGE_TYPE_MESSAGE.equals(messageType)) {
                //sendNotification("Message Received from Google GCM Server: "+ extras.get(Keys.MSG_KEY));
            }
        }
        GcmBroadcastReceiver.completeWakefulIntent(intent);
    }
}

GcmBroadcastReceiver.java

public class GcmBroadcastReceiver extends WakefulBroadcastReceiver {

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

        if (intent.getAction().equals("com.google.android.c2dm.intent.RECEIVE")) {
            handleMessage(context, intent);
        }

        ComponentName comp = new ComponentName(context.getPackageName(),
                GCMNotificationIntentService.class.getName());
        startWakefulService(context, (intent.setComponent(comp)));
        setResultCode(Activity.RESULT_OK);
        /*Toast.makeText(context, "notification_Recieved", Toast.LENGTH_LONG)
                .show();*/
    }

    private void handleMessage(Context context, Intent intent) {

        if(intent.getExtras()!=null){

            Bundle message = intent.getExtras();
            String s= message.getString("the_message");
            final Intent emptyIntent = new Intent(context,ActMain.class);
            PendingIntent pendingIntent = PendingIntent.getActivity(context, 1234, emptyIntent, PendingIntent.FLAG_UPDATE_CURRENT);
            NotificationCompat.Builder mBuilder =
                    new NotificationCompat.Builder(context)
                    .setSmallIcon(R.drawable.notification_logo)
                    .setContentTitle(context.getResources().getString(R.string.screenname_apptitle))
                    .setContentText(s)
                    .setAutoCancel(true)
                    .setContentIntent(pendingIntent);

             // Set Vibrate, Sound and Light            
            int defaults = 0;
            defaults = defaults | Notification.DEFAULT_SOUND | Notification.FLAG_AUTO_CANCEL;
            mBuilder.setDefaults(defaults);

            NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
            notificationManager.notify(1234, mBuilder.build());

            /*Toast.makeText(context.getApplicationContext(),
                    "\n message : " + message, 1).show();*/

            NotificationManager objNotfManager = (NotificationManager) context
                    .getApplicationContext().getSystemService(
                            Context.NOTIFICATION_SERVICE);
        }
    }
}

【问题讨论】:

    标签: java android google-cloud-messaging


    【解决方案1】:

    它正在替换旧的,因为所有通知的通知 ID 都是相同的。因此,当您尝试添加新通知时,它会替换旧通知而不是添加新通知。

    notificationManager.notify(1234, mBuilder.build());
    

    这一行是问题所在,您正在发送 1234 作为所有通知的通知 ID,请将此行替换为 notificationManager.notify(uniqueId, mBuilder.build());

    如果您想为不同的推送添加不同的通知,请添加不同的通知 ID。 您也可以为通知设置收件箱模式,以便一组通知在一个下可见,就像 gmail 看到这个link

    为了更好地理解通知,请参阅this

    【讨论】:

      【解决方案2】:
      Date date = new Date();
      int notification_id = (int) date.getTime();
      notificationManager.notify(notification_id, notification);
      

      使用时间戳 ID 而不是通知 ID 的最终值

      【讨论】:

        【解决方案3】:

        尝试改变这个

        NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
                    notificationManager.notify(1234, mBuilder.build());
        

        NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
                    notificationManager.notify(System.currentTimeMillis(), mBuilder.build());
        

        它应该有一个唯一的编号。希望这会有所帮助

        【讨论】:

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