Question

当我通过GCM发送消息时，它会显示在通知栏上，没有任何问题。如果我单击此通知以在活动中显示它;它没有显示信息。

但是，如果我开始我的活动（NotificationDisplay），然后发送消息，我的消息显示。

那么如何在 notstarted 活动中显示我的通知消息。

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

GCMIntentService：

@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);      

    }

NotificationDisplay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();
                }
            };

Answer 1

检查onCreate是否被调用..如果每次单击通知区域的通知时调用它，则替换代码：

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

带

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

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

Android GCM：显示消息

1 个答案: