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，即应用程序不在后台运行。我手机中的其他应用程序即使在后台运行时也可以向我发送通知。我正在使用奥利奥版本。

我也用">

数据"替换了"通知"，这并没有区别。 我已经在onMessageReceived方法上添加了自定义通知，"通知"和"数据"都在前台和后台发出通知。唯一的区别是"数据"在后台也运行在MessageReceived方法上。但是在两者上，当应用程序被杀死时，不会收到通知。我已经尝试在 php 上遵循代码。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 方法中执行以下操作：

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！这是由于移动最近的更新。在Vivo，oppo，xiomi等手机中，当应用程序被清除时，它会强制停止应用程序强制停止所有服务。因此，FCM 服务也会停止，并且在移动设备上不会收到任何通知。因此，要获得通知，用户必须允许应用程序在后台运行，必须选中"允许在后台运行"。这就解决了问题。如果您仍然有问题，请发表评论！！

Answer 1

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());
}