Android/Firebase - 解析 GCM 事件中的时间戳时出错 - 空时间戳

Question

我正在构建一个将接收推送通知的 Android 应用程序。我已经设置了 Firebase 云消息传递并且几乎可以正常工作，这样我就可以将以下有效负载发送到有效 token 并收到通知和数据。

使用网址 https://fcm.googleapis.com/fcm/send

{
 "to":"<valid-token>",
 "notification":{"body":"BODY TEXT","title":"TITLE TEXT","sound":"default"},
 "data":{"message":"This is some data"}
}

我的应用程序正确接收并可以处理它。

唯一的小问题是我在调试中抛出了以下异常:

Error while parsing timestamp in GCM event
    java.lang.NumberFormatException: Invalid int: "null"
        at java.lang.Integer.invalidInt(Integer.java:138)
        ...

它不会使应用程序崩溃，只是看起来不整洁。

我已经尝试将 timestamp 项目添加到主要有效负载、通知、数据，还尝试了诸如 time 之类的变体，但似乎无法获得摆脱异常(和谷歌一样，我找不到答案)。

如何传递时间戳以使其停止提示？

已编辑:这是我的onMessageReceived 方法，但我认为异常在到达此处之前已抛出

@Override
public void onMessageReceived(RemoteMessage remoteMessage) {
    Log.d(TAG, "From: " + remoteMessage.getFrom());

    // Check if message contains a data payload.
    if (remoteMessage.getData().size() > 0) {
        Log.d(TAG, "Message data payload: " + remoteMessage.getData());
        //TODO Handle the data
    }

    // Check if message contains a notification payload.
    if (remoteMessage.getNotification() != null) {
        Log.d(TAG, "Message Notification Body: " + remoteMessage.getNotification().getBody());
    }
}

提前致谢，克里斯

Answer 1

即使 notification 显然是受支持的元素(根据 Firebase 网络文档)，我摆脱异常的唯一方法是完全删除它，并使用 data 部分，然后在我的应用程序中创建一个通知(而不是让 firebase 执行通知)。

我使用这个网站来研究如何发出通知:https://www.androidhive.info/2012/10/android-push-notifications-using-google-cloud-messaging-gcm-php-and-mysql/

我的通知现在如下所示:

    $fields = array("to" => "<valid-token>",
                    "data" => array("data"=>
                                        array(
                                            "message"=>"This is some data",
                                            "title"=>"This is the title",
                                            "is_background"=>false,
                                            "payload"=>array("my-data-item"=>"my-data-value"),
                                            "timestamp"=>date('Y-m-d G:i:s')
                                            )
                                    )
                    );
    ...
    <curl stuff here>
    ...
    curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($fields));

我的 onMessageReceived 看起来像这样:

@Override
public void onMessageReceived(RemoteMessage remoteMessage) {
    Log.d(TAG, "From: " + remoteMessage.getFrom());

    // Check if message contains a data payload.
    if (remoteMessage.getData().size() > 0) {
        Log.e(TAG, "Data Payload: " + remoteMessage.getData().toString());

        try {
            JSONObject json = new JSONObject(remoteMessage.getData().toString());
            handleDataMessage(json);
        } catch (Exception e) {
            Log.e(TAG, "Exception: " + e.getMessage());
        }
    }
}

调用 handleDataMessage 看起来像这样:

private void handleDataMessage(JSONObject json) {
    Log.e(TAG, "push json: " + json.toString());

    try {
        JSONObject data = json.getJSONObject("data");

        String title = data.getString("title");
        String message = data.getString("message");
        boolean isBackground = data.getBoolean("is_background");
        String timestamp = data.getString("timestamp");
        JSONObject payload = data.getJSONObject("payload");

        // play notification sound
        NotificationUtils notificationUtils = new NotificationUtils(getApplicationContext());
        notificationUtils.playNotificationSound();

        if (!NotificationUtils.isBackgroundRunning(getApplicationContext())) {
            // app is in foreground, broadcast the push message
            Intent pushNotification = new Intent(ntcAppManager.PUSH_NOTIFICATION);
            pushNotification.putExtra("message", message);
            LocalBroadcastManager.getInstance(this).sendBroadcast(pushNotification);

        } else {
            // app is in background, show the notification in notification tray
            Intent resultIntent = new Intent(getApplicationContext(), MainActivity.class);
            resultIntent.putExtra("message", message);

            showNotificationMessage(getApplicationContext(), title, message, timestamp, resultIntent);
        }
    } catch (JSONException e) {
        Log.e(TAG, "Json Exception: " + e.getMessage());
    } catch (Exception e) {
        Log.e(TAG, "Exception: " + e.getMessage());
    }
}

然后调用 showNotificationMessage

/**
 * Showing notification with text only
 */
private void showNotificationMessage(Context context, String title, String message, String timeStamp, Intent intent) {
    notificationUtils = new NotificationUtils(context);
    intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
    notificationUtils.showNotificationMessage(title, message, timeStamp, intent);
}

随后 notificationUtils.showNotificationMessage

public void showNotificationMessage(String title, String message, String timeStamp, Intent intent) {
    showNotificationMessage(title, message, timeStamp, intent, null);
}

public void showNotificationMessage(final String title, final String message, final String timeStamp, Intent intent, String imageUrl) {
    // Check for empty push message
    if (TextUtils.isEmpty(message))
        return;


    // notification icon
    final int icon = R.mipmap.ic_launcher;

    intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP);
    final PendingIntent resultPendingIntent =
            PendingIntent.getActivity(
                    mContext,
                    0,
                    intent,
                    PendingIntent.FLAG_CANCEL_CURRENT
            );

    final NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(
            mContext);

    final Uri alarmSound = Uri.parse(ContentResolver.SCHEME_ANDROID_RESOURCE
            + "://" + mContext.getPackageName() + "/raw/notification");


    showSmallNotification(mBuilder, icon, title, message, timeStamp, resultPendingIntent, alarmSound);
    playNotificationSound();

}

private void showSmallNotification(NotificationCompat.Builder mBuilder, int icon, String title, String message, String timeStamp, PendingIntent resultPendingIntent, Uri alarmSound) {

    NotificationCompat.InboxStyle inboxStyle = new NotificationCompat.InboxStyle();

    inboxStyle.addLine(message);

    Notification notification;
    notification = mBuilder.setSmallIcon(icon).setTicker(title).setWhen(0)
            .setAutoCancel(true)
            .setContentTitle(title)
            .setContentIntent(resultPendingIntent)
            .setSound(alarmSound)
            .setStyle(inboxStyle)
            .setWhen(getTimeMilliSec(timeStamp))
            .setSmallIcon(R.mipmap.ic_launcher)
            .setLargeIcon(BitmapFactory.decodeResource(mContext.getResources(), icon))
            .setContentText(message)
            .build();

    NotificationManager notificationManager = (NotificationManager) mContext.getSystemService(Context.NOTIFICATION_SERVICE);
    notificationManager.notify(ntcAppManager.NOTIFICATION_ID, notification);
}

上面的链接中有更多详细信息，处理很多，但至少异常消失了，我可以控制通知。