Android GCM：显示消息

当我通过GCM发送消息时，它会毫无问题地出现在通知栏上。如果我单击此通知以在活动中显示它；它不显示消息

但是如果我开始我的活动（NotificationDisplay），然后发送消息，我的消息就会显示出来

因此，如何在notstarted活动中显示通知消息

（我认为问题可能是“registerReceiver”：它在NotificationDisplay onCrate中；所以如果活动未启动，则无法注册？）

GCMinentService：

@Override
    protected void onMessage(Context context, Intent intent) {
        Log.i(TAG, "Received message");
        String message = intent.getExtras().getString("msg"); 

       Intent intent = new Intent(DISPLAY_MESSAGE_ACTION);
        intent.putExtra(EXTRA_MESSAGE, message);
        context.sendBroadcast(intent);
        generateNotification(context, message);

    }

 private static void generateNotification(Context context, String message) {
        int icon = R.drawable.ic_launcher;
        long when = System.currentTimeMillis();
        NotificationManager notificationManager = (NotificationManager)
                context.getSystemService(Context.NOTIFICATION_SERVICE);
        Notification notification = new Notification(icon, message, when);

        String title = context.getString(R.string.app_name);

        Intent notificationIntent = new Intent(context, NotificationPage.class);
        // set intent so it does not start a new activity            

        notificationIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP |
                Intent.FLAG_ACTIVITY_SINGLE_TOP);
        PendingIntent intent =
                PendingIntent.getActivity(context, 0, notificationIntent, 0);

        notification.setLatestEventInfo(context, title, message, intent);
        notification.flags |= Notification.FLAG_AUTO_CANCEL;

        // Play default notification sound
        notification.defaults |= Notification.DEFAULT_SOUND;


        // Vibrate if vibrate is enabled
        notification.defaults |= Notification.DEFAULT_VIBRATE;
        notificationManager.notify(0, notification);      

    }

通知显示活动：

@Override
            protected void onCreate(Bundle savedInstanceState) {
                super.onCreate(savedInstanceState);
                setContentView(R.layout.notification_page);         

                lblMessage = (TextView) findViewById(R.id.lblMessage);

                registerReceiver(mHandleMessageReceiver, new IntentFilter(
                        DISPLAY_MESSAGE_ACTION));
            }

public final BroadcastReceiver mHandleMessageReceiver = new BroadcastReceiver() {
                @Override
                public void onReceive(Context context, Intent intent) {

                     newMessage = intent.getExtras().getString(EXTRA_MESSAGE);
                    // Waking up mobile if it is sleeping
                    WakeLocker.acquire(getApplicationContext());

                    /**
                     * Take appropriate action on this message
                     * depending upon your app requirement
                     * For now i am just displaying it on the screen
                     * */

                    // Showing received message
                    lblMessage.setText(newMessage + "\n");
                // lblMessage.append(newMessage + "\n");            
                    Toast.makeText(getApplicationContext(), "New Message: " + newMessage, Toast.LENGTH_LONG).show();

                    // Releasing wake lock
                    WakeLocker.release();
                }
            };

---

检查是否调用onCreate。如果每次单击通知区域的通知时都会调用onCreate，则替换代码：

`PendingIntent intent = PendingIntent.getActivity(context, 0, notificationIntent, 0)`

与

PendingIntent intent = PendingIntent.getActivity(context, 0, notificationIntent, PendingIntent.FLAG_UPDATE_CURRENT)

---

如果未调用onCreate，请尝试更新onResume或onNewIntent方法上的文本。如果您的问题得到解决，请告诉我

我的问题与原始海报相同。如何确定是否调用了onCreate？我确实在我的GCMinentService中添加了“PendingEvent.FLAG_UPDATE_CURRENT”。此外，我不知道如何更新onResume方法以接收那里的意图。请尝试登录onCreate/onResume/onNewIntent，并让我知道调用的是哪一个？学习如何创建日志，在我弄清楚后将报告。使用Util包中的log类。。。。。好的，日志也是这样，当我按下通知栏消息时，它确实调用了onCreate。也许我应该开始一个新的问题，这样我也可以发布我的代码。