即使应用程序被杀死，如何向安卓设备发送推送通知？

Question

当应用程序处于前台和后台时，我可以发送通知。但是当应用程序被杀死时无法发送它，即应用程序没有在后台运行。我手机中的其他应用程序即使在后台运行时也能够向我发送通知。我正在使用奥利奥版本。

我也用“数据”替换了“通知”，这并没有什么不同。 我已经在 onMessageReceived 方法上添加了自定义通知，“通知”和“数据”都在前台和后台提供通知。唯一的区别是“数据”也在后台运行 onMessageReceived 方法。但是在两者上，当应用程序被杀死时都没有收到通知。我在 php 上尝试了以下代码。我做错了什么？

function sendPushNotification($token) {

    $url = "https://fcm.googleapis.com/fcm/send";

    $serverKey = 'AAAA.....theKey';
    $title = "My App";
    $body = "hello there!!";
    $notification = array('title' =>$title , 'body' => $body, 'sound' => 'default', 'badge' => '1');
    $arrayToSend = array('to' => $token, 'notification' => $notification,'priority'=>'high');
    $json = json_encode($arrayToSend);
    $headers = array();
    $headers[] = 'Content-Type: application/json';
    $headers[] = 'Authorization: key='. $serverKey;
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_CUSTOMREQUEST,"POST");
    curl_setopt($ch, CURLOPT_POSTFIELDS, $json);
    curl_setopt($ch, CURLOPT_HTTPHEADER,$headers);
    //Send the request
    $response = curl_exec($ch);
    //Close request
 /*   if ($response === FALSE) {
    die('FCM Send Error: ' . curl_error($ch));
    }*/
    curl_close($ch);

   // echo "<br>";

   return $response;

}

在 onMessageReceived 方法之后：

对于“通知”：

public void onMessageReceived(RemoteMessage remoteMessage) {

    Log.d("apkflow","onMessageReceived Started");

    if (remoteMessage.getNotification() != null) {
        title = remoteMessage.getNotification().getTitle();
        body = remoteMessage.getNotification().getBody();

        Log.d("apkflow","title = " + title);
        Log.d("apkflow","body = " + body);
    }
}

对于“数据”：

        title = remoteMessage.getData().get("title");
        body = remoteMessage.getData().get("body");

更新:: 我现在得到了解决方案！它是由于移动最近更新。在vivo、oppo、xiomi等手机中，当app被清除时，会强制停止应用程序强制停止所有服务。因此，FCM 服务也停止了，移动设备上也没有收到任何通知。因此，为了获得通知，用户必须允许应用程序在后台运行，必须选中“允许在后台”。这解决了问题。如果还有问题，请留言！！

Answer 1

同时包含通知和数据负载的消息，当在 背景。

更改notification 类型data

$arrayToSend = array('to' => $token, 'data' => $notification,'priority'=>'high');

请仔细阅读以下文档 https://firebase.google.com/docs/cloud-messaging/android/receive

您必须创建自定义通知。

private void setNotification(RemoteMessage content) {
        Log.d(TAG, "custom notification: ");
        Intent intent = new Intent(this, NotificationActivity.class);
        if (!content.getData().get("url").isEmpty())
            intent.putExtra("url", content.getData().get("url"));
        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
        intent.setAction(Long.toString(System.currentTimeMillis()));
        PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, intent,
                PendingIntent.FLAG_ONE_SHOT);


        RemoteViews remoteViews = new RemoteViews(getPackageName(),
                R.layout.custome_notification);

        remoteViews.setTextViewText(R.id.tvTime, currentDate());
        remoteViews.setTextViewText(R.id.text, content.getData().get("text"));

        Uri defaultSoundUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
        NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this, getPackageName())
                .setSmallIcon(R.drawable.ic_alert)
                .setContent(remoteViews)
                .setAutoCancel(true)
                .setSound(defaultSoundUri);
        notificationBuilder.setContentIntent(pendingIntent);
        NotificationManager notificationManager =
                (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
        // To avoid replacing old notification by new one. To set new id for every new Notification following notifications.
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            int importance = NotificationManager.IMPORTANCE_HIGH;
            NotificationChannel mChannel = new NotificationChannel(getPackageName(), "AppName", importance);
            notificationManager.createNotificationChannel(mChannel);
        }
        int notifyId = (int) System.currentTimeMillis();
        notificationManager.notify(notifyId, notificationBuilder.build());
    }