从服务器端发送FCM消息到Android设备 [英] Send FCM messages from server side to android device

问题描述

我尝试了git中的示例应用程序，它工作得很好。我可以从控制台发送通知。

但是我想在触发某个事件后从服务器发送通知。

  05-20 20：40：58.941 30132-30919 / com我喜欢在GCM中遵循相同的方法，但它不起作用。 .google.firebase.quickstart.fcm E / AndroidRuntime：FATAL EXCEPTION：pool-1-thread-1 
进程：com.google.firebase.quickstart.fcm，PID：30132 
 java.lang.NullPointerException ：尝试在com.google.firebase.quickstart.fcm.MyFirebaseMessagingService的空对象引用
上调用虚拟方法'java.lang.String com.google.firebase.messaging.RemoteMessage $ Notification.getBody（）'。 onMessageReceived（MyFirebaseMessagingService.java:53）
，位于com.google.firebase.messaging.FirebaseMessagingService.zzo（未知源）
，位于com.google.firebase.messaging.FirebaseMessagingService.zzn（未知源）
位于com.google.firebase.messaging.FirebaseMessagingService.zzm（未知源）
，位于com.google .firebase.iid.zzb $ 2.run（Unknown Source）
在java.util.concurrent.ThreadPoolExecutor.runWorker（ThreadPoolExecutor.java:1113）
在java.util.concurrent.ThreadPoolExecutor $ Worker.run （ThreadPoolExecutor.java:588）
 java.lang.Thread.run（Thread.java:818）
 05-20 20：40：5 9.118 30132-30279 / com.google.firebase.quickstart.fcm E / Surface：getSlotFromBufferLocked：unknown buffer：0xb9e83390 
  

遵循这个 PHP脚本发送通知。
如果我尝试执行脚本，我会得到以下结果。

  {multicast_id：4679427854122301046，成功：1，failure：0，canonical_ids：0，results：[{message_id：0：1463757518309261％31bd1c96f9fd7ecd}]} 
  pre> 
 
 
注意：我浏览了他们的 docs 并修改代码的要点是只有主体和标题。即使那样它不起作用。 
解决方案
您可以使用这个完整的代码 
 
 
 <？php 
 
函数sendFCM（$ mess，$ id）{
 $ url ='https://fcm.googleapis.com/fcm/send'; 
 $ fields = array（
'to'=> $ id，
'notification'=> array（
body=> $ mess，
title=>Title，
icon=>myicon
）
）; 
 $ fields = json_encode（$ fields）; 
 $ headers = array（
'Authorization：key ='。AIzaSyA9vpL9OuX6moOYw-4n3YTSXpoSGQVGnyM，
'Content-Type：application / json'
）; 
 
 $ ch = curl_init（）; 
 curl_setopt（$ ch，CURLOPT_URL，$ url）; 
 curl_setopt（$ ch，CURLOPT_POST，true）; 
 curl_setopt（$ ch，CURLOPT_HTTPHEADER，$ headers）; 
 curl_setopt（$ ch，CURLOPT_RETURNTRANSFER，true）; 
 curl_setopt（$ ch，CURLOPT_POSTFIELDS，$ fields）; 
 
 $ result = curl_exec（$ ch）; 
 curl_close（$ ch）; 
} 
 
？> 
  
将消息和标记ID作为参数传递给 sendFCM（$ mess， $ id）呼叫。  
With the new update, FCM is now going to be used.

I tried the sample app from git and it's working all fine. I can send notifications from the console.

But I want to send the notification from the server after a certain event is triggered. I followed the same approach like in GCM but it's not working.
05-20 20:40:58.941 30132-30919/com.google.firebase.quickstart.fcm E/AndroidRuntime: FATAL EXCEPTION: pool-1-thread-1
                                                                                    Process: com.google.firebase.quickstart.fcm, PID: 30132
                                                                                    java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String com.google.firebase.messaging.RemoteMessage$Notification.getBody()' on a null object reference
                                                                                        at com.google.firebase.quickstart.fcm.MyFirebaseMessagingService.onMessageReceived(MyFirebaseMessagingService.java:53)
                                                                                        at com.google.firebase.messaging.FirebaseMessagingService.zzo(Unknown Source)
                                                                                        at com.google.firebase.messaging.FirebaseMessagingService.zzn(Unknown Source)
                                                                                        at com.google.firebase.messaging.FirebaseMessagingService.zzm(Unknown Source)
                                                                                        at com.google.firebase.iid.zzb$2.run(Unknown Source)
                                                                                        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)
                                                                                        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
                                                                                        at java.lang.Thread.run(Thread.java:818)
05-20 20:40:59.118 30132-30279/com.google.firebase.quickstart.fcm E/Surface: getSlotFromBufferLocked: unknown buffer: 0xb9e83390
Am following this PHP Script to send the notification. 
If I try to execute the script, I get the following result.
{"multicast_id":4679427854122301046,"success":1,"failure":0,"canonical_ids":0,"results":[{"message_id":"0:1463757518309261%31bd1c96f9fd7ecd"}]}
NOTE : I went through their docs and modified the code is gist to have only body and title. Even then it's not working. 
解决方案
You can use this complete code
<?php

function sendFCM($mess,$id) {
$url = 'https://fcm.googleapis.com/fcm/send';
$fields = array (
        'to' => $id,
        'notification' => array (
                "body" => $mess,
                "title" => "Title",
                "icon" => "myicon"
        )
);
$fields = json_encode ( $fields );
$headers = array (
        'Authorization: key=' . "AIzaSyA9vpL9OuX6moOYw-4n3YTSXpoSGQVGnyM",
        'Content-Type: application/json'
);

$ch = curl_init ();
curl_setopt ( $ch, CURLOPT_URL, $url );
curl_setopt ( $ch, CURLOPT_POST, true );
curl_setopt ( $ch, CURLOPT_HTTPHEADER, $headers );
curl_setopt ( $ch, CURLOPT_RETURNTRANSFER, true );
curl_setopt ( $ch, CURLOPT_POSTFIELDS, $fields );

$result = curl_exec ( $ch );
curl_close ( $ch );
}

?>
Pass message and token id as a parameter to the sendFCM($mess,$id) call. 

                        
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