使用 GCM 向多个 Android 设备发送推送通知
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时间：2020-08-20 09:45:48 来源:igfitidea点击:
sending push notifications to multiple android devices using GCM
提问by user3225075
I am following http://javapapers.com/android/google-cloud-messaging-gcm-for-android-and-push-notifications/? to send push notifications via GCM. Everything works fine but, i am able to send push notification to just one device. Registering another device replaces registration id of previous device. I tried solution provided by Shardool in http://javapapers.com/android/android-multicast-notification-using-google-cloud-messaging-gcm/? but its not working.
我正在关注http://javapapers.com/android/google-cloud-messaging-gcm-for-android-and-push-notifications/？通过 GCM 发送推送通知。一切正常，但是，我只能向一台设备发送推送通知。注册另一个设备会替换之前设备的注册 ID。我在http://javapapers.com/android/android-multicast-notification-using-google-cloud-messaging-gcm/ 中尝试了 Shardool 提供的解决方案？但它不工作。
Any suggestion would be of great help.
任何建议都会有很大帮助。
Here are my gcm.phpcodes that registers device and sends push notifications but, only to a single device registered recently.
这是我gcm.php注册设备并发送推送通知的代码，但仅限于最近注册的单个设备。
gcm.php
文件
<?php
//generic php function to send GCM push notification
function sendPushNotificationToGCM($registatoin_ids, $message) {
//Google cloud messaging GCM-API url
$url = 'https://android.googleapis.com/gcm/send';
$fields = array(
'registration_ids' => $registatoin_ids,
'data' => $message,
);
// Google Cloud Messaging GCM API Key
define("GOOGLE_API_KEY", "MY_KEY");
$headers = array(
'Authorization: key=' . GOOGLE_API_KEY,
'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($ch, CURLOPT_POSTFIELDS, json_encode($fields));
$result = curl_exec($ch);
if ($result === FALSE) {
die('Curl failed: ' . curl_error($ch));
}
curl_close($ch);
return $result;
}
?>
<?php
//this block is to post message to GCM on-click
$pushStatus = "";
if ( ! empty($_GET["push"])) {
$gcmRegID = file_get_contents("GCMRegId.txt");
$pushMessage = $_POST["message"];
if (isset($gcmRegID) && isset($pushMessage)) {
$gcmRegIds = array($gcmRegID);
$message = array("m" => $pushMessage);
$pushStatus = sendPushNotificationToGCM($gcmRegIds, $message);
}
}
//this block is to receive the GCM regId from external (mobile apps)
if ( ! empty($_GET["shareRegId"])) {
$gcmRegID = $_POST["regId"];
file_put_contents("GCMRegId.txt",$gcmRegID);
echo "Ok!";
exit;
}
?>
<html>
<head>
<title>Google Cloud Messaging (GCM) Server in PHP</title>
</head>
<body>
<h1>Google Cloud Messaging (GCM) Server in PHP</h1>
<form method="post" action="gcm.php/?push=1">
<div>
<textarea rows="2" name="message" cols="23" placeholder="Message to transmit via GCM"></textarea>
</div>
<div><input type="submit" value="Send Push Notification via GCM" /></div>
</form>
<p><h3><?php echo $pushStatus; ?></h3></p>
</body>
</html>
Please tell me how do I store multiple device registration ids in GCMRegid.txtand send notifications to each of the registered device
请告诉我如何在GCMRegid.txt 中存储多个设备注册 ID并向每个注册设备发送通知
采纳答案by Coderji
Here I rewrote the php using mysql rather than retrieving the keys from file. In this case, I retrieve all the regIdsfrom the table and put them in an array and pass it to sendPushNotification function to push the message to all. here you have 2 files, one for connect to database and one for GCM:
在这里，我使用 mysql 重写了 php，而不是从文件中检索密钥。在这种情况下，我从表中检索所有regIds并将它们放入一个数组中并将其传递给 sendPushNotification 函数以将消息推送给所有人。这里有 2 个文件，一个用于连接数据库，一个用于 GCM：
connect.php:
连接.php：
<?php
$db_host = "localhost";
$db_user = "root"; //change to your database username, it is root by default
$db_pass = ''; //change to your database password, for XAMPP it is nothing for WAMPP it is root
$db_db = 'gcmFirst'; //change to your database name
if(!@mysql_connect($db_host, $db_user, $db_pass) || !@mysql_select_db($db_db)) {
die('couldnt connect to database ' .mysql_error());
}
?>
gcm.php
文件
<?php
require 'connect.php';
function sendPushNotification($registration_ids, $message) {
$url = 'https://android.googleapis.com/gcm/send';
$fields = array(
'registration_ids' => $registration_ids,
'data' => $message,
);
define('GOOGLE_API_KEY', 'AIzaSyCjctNK2valabAWL7rWUTcoRA-UAXI_3ro');
$headers = array(
'Authorization:key=' . GOOGLE_API_KEY,
'Content-Type: application/json'
);
echo json_encode($fields);
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($fields));
$result = curl_exec($ch);
if($result === false)
die('Curl failed ' . curl_error());
curl_close($ch);
return $result;
}
$pushStatus = '';
if(!empty($_GET['push'])) {
$query = "SELECT regId FROM users";
if($query_run = mysql_query($query)) {
$gcmRegIds = array();
while($query_row = mysql_fetch_assoc($query_run)) {
array_push($gcmRegIds, $query_row['regId']);
}
}
$pushMessage = $_POST['message'];
if(isset($gcmRegIds) && isset($pushMessage)) {
$message = array('message' => $pushMessage);
$pushStatus = sendPushNotification($gcmRegIds, $message);
}
}
if(!empty($_GET['shareRegId'])) {
$gcmRegId = $_POST['regId'];
$query = "INSERT INTO users VALUES ('', '$gcmRegId')";
if($query_run = mysql_query($query)) {
echo 'OK';
exit;
}
}
?>
<html>
<head>
<title>Google Cloud Messaging (GCM) Server in PHP</title>
</head>
<body>
<h1>Google Cloud Messaging (GCM) Server in PHP</h1>
<form method = 'POST' action = 'gcm.php/?push=1'>
<div>
<textarea rows = 2 name = "message" cols = 23 placeholder = 'Messages to Transmit via GCM'></textarea>
</div>
<div>
<input type = 'submit' value = 'Send Push Notification via GCM'>
</div>
<p><h3><?php echo $pushStatus ?></h3></p>
</form>
</body>
</html>
all you have to do is create a database that has a users table with id, regId and name as columns.
您所要做的就是创建一个数据库，该数据库具有一个以 id、regId 和 name 作为列的用户表。
Hope this is what you are looking for
希望这是你正在寻找的
回答by Jahid
I have modified the above gcm.phpa little to meet my needs:
我稍微修改了上面的gcm.php以满足我的需要：
- The page should be automatically reloaded to it's original form after sending push notification.
- It should show the number of users registered.
- GCM doesn't allow more than 1000 regId at a time. So it should tackle that situation. (sending packets of 1000 pushnotifications in a loop).
- 发送推送通知后，页面应自动重新加载到其原始形式。
- 它应该显示注册的用户数量。
- GCM 一次不允许超过 1000 个 regId。所以它应该解决这种情况。（循环发送 1000 个推送通知的数据包）。
gcm_main.php:
gcm_main.php:
<?php
require 'connect.php'; //this is the same as as other answers on this topic
function sendPushNotification($registration_ids, $message) {
$url = 'https://android.googleapis.com/gcm/send';
$fields = array(
'registration_ids' => $registration_ids,
'data' => $message,
);
define('GOOGLE_API_KEY', 'your_google_api_key_here');
$headers = array(
'Authorization:key=' . GOOGLE_API_KEY,
'Content-Type: application/json'
);
echo json_encode($fields);
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($fields));
$result = curl_exec($ch);
if($result === false)
die('Curl failed ' . curl_error());
curl_close($ch);
return $result;
}
function redirect($url)
{
if (!headers_sent())
{
header('Location: '.$url);
exit;
}
else
{
echo '<script type="text/javascript">';
echo 'window.location.href="'.$url.'";';
echo '</script>';
echo '<noscript>';
echo '<meta http-equiv="refresh" content="0;url='.$url.'" />';
echo '</noscript>'; exit;
}
}
$pushStatus = '';
if(!empty($_GET['push'])) {
$query = "SELECT gcm_regid FROM gcm_users";
if($query_run = mysql_query($query)) {
$gcmRegIds = array();
while($query_row = mysql_fetch_assoc($query_run)) {
array_push($gcmRegIds, $query_row['gcm_regid']);
}
}
$pushMessage = $_POST['message'];
if(isset($gcmRegIds) && isset($pushMessage)) {
$message = array('price' => $pushMessage);
$regIdChunk=array_chunk($gcmRegIds,1000);
foreach($regIdChunk as $RegId){
$pushStatus = sendPushNotification($RegId, $message);}
}
$url="url_to_this_php_file";
redirect($url);
}
if(!empty($_GET['shareRegId'])) {
$gcmRegId = $_POST['gcm_regid'];
$query = "INSERT INTO gcm_users VALUES ('', '$gcmRegId')";
if($query_run = mysql_query($query)) {
// echo 'OK';
exit;
}
}
?>
<html>
<head>
<title>Whatever Title</title>
</head>
<body>
<?php
include_once 'db_functions.php';
$db = new DB_Functions();
$users = $db->getAllUsers();
if ($users != false)
$no_of_users = mysql_num_rows($users);
else
$no_of_users = 0;
?>
<h1>Whatever you want</h1>
<h2>Whatever you want</h2>
<h3>Push Notification Admin Panel</h3>
<h4>Current Registered users: <?php echo $no_of_users; ?></h4>
<h4></h4>
<form method = 'POST' action = 'gcm_main.php/?push=1'>
<div>
<textarea rows = "3" name = "message" cols = "75" placeholder = "Type message here"></textarea>
</div>
<div>
<input type = "submit" value = "Send Notification">
</div>
</form>
</body>
</html>
db_connect.php:
db_connect.php:
<?php
class DB_Connect {
// constructor
function __construct() {
}
// destructor
function __destruct() {
// $this->close();
}
// Connecting to database
public function connect() {
require_once 'config.php';
// connecting to mysql
$con = mysql_connect(DB_HOST, DB_USER, DB_PASSWORD);
// selecting database
mysql_select_db(DB_DATABASE);
// return database handler
return $con;
}
// Closing database connection
public function close() {
mysql_close();
}
}
?>
db_functions.php:
db_functions.php:
<?php
class DB_Functions {
private $db;
//put your code here
// constructor
function __construct() {
include_once './db_connect.php';
// connecting to database
$this->db = new DB_Connect();
$this->db->connect();
}
// destructor
function __destruct() {
}
/**
* Storing new user
* returns user details
*/
public function storeUser($name, $email, $gcm_regid) {
// insert user into database
$result = mysql_query("INSERT INTO gcm_users(name, email, gcm_regid, created_at) VALUES('$name', '$email', '$gcm_regid', NOW())");
// check for successful store
if ($result) {
// get user details
$id = mysql_insert_id(); // last inserted id
$result = mysql_query("SELECT * FROM gcm_users WHERE id = $id") or die(mysql_error());
// return user details
if (mysql_num_rows($result) > 0) {
return mysql_fetch_array($result);
} else {
return false;
}
} else {
return false;
}
}
/**
* Get user by email and password
*/
public function getUserByEmail($email) {
$result = mysql_query("SELECT * FROM gcm_users WHERE email = '$email' LIMIT 1");
return $result;
}
/**
* Getting all users
*/
public function getAllUsers() {
$result = mysql_query("select * FROM gcm_users");
return $result;
}
/**
* Check user is existed or not
*/
public function isUserExisted($id) {
$result = mysql_query("SELECT gcm_regid from gcm_users WHERE gcm_regid = '$id'");
$no_of_rows = mysql_num_rows($result);
if ($no_of_rows > 0) {
// user existed
return true;
} else {
// user not existed
return false;
}
}
public function deleteUser($id){
$result=mysql_query("DELETE FROM gcm_users WHERE gcm_regid = '$id'");
}
}
?>
config.php:
配置文件：
<?php
/**
* Database config variables
*/
define("DB_HOST", "localhost");
define("DB_USER", "root");
define("DB_PASSWORD", "");
define("DB_DATABASE", "gcm");
/*
* Google API Key
*/
define("GOOGLE_API_KEY", "your_google_api_key_here"); // Place your Google API Key
?>
EDIT:
编辑：
I have re-written the PHP code with some refinements and using MySqli (instead of MySql). It's in Github.
我已经通过一些改进并使用 MySqli（而不是 MySql）重新编写了 PHP 代码。它在Github 中。
回答by Reyaan Roy
Sending Push Notification to multiple devices is same as we send to individual device. Just store the registration token of all registered device to your server. And when calling the push notification with curl (I am assuming you are using php as server side) Put all the registration id in an array. This is a sample code
向多个设备发送推送通知与我们向单个设备发送相同。只需将所有注册设备的注册令牌存储到您的服务器。当使用 curl 调用推送通知时（我假设您使用 php 作为服务器端）将所有注册 ID 放在一个数组中。这是一个示例代码
<?php
//Define your GCM server key here
define('API_ACCESS_KEY', 'your server api key');
//Function to send push notification to all
function sendToAll($message)
{
$db = new DbOperation();
$tokens = $db->getAllToken();
$regTokens = array();
while($row = $tokens->fetch_assoc()){
array_push($regTokens,$row['token']);
}
sendNotification($regTokens,$message);
}
//function to send push notification to an individual
function sendToOne($email,$message){
$db = new DbOperation();
$token = $db->getIndividualToken($email);
sendNotification(array($token),$message);
}
//This function will actually send the notification
function sendNotification($registrationIds, $message)
{
$msg = array
(
'message' => $message,
'title' => 'Android Push Notification using Google Cloud Messaging',
'subtitle' => 'www.simplifiedcoding.net',
'tickerText' => 'Ticker text here...Ticker text here...Ticker text here',
'vibrate' => 1,
'sound' => 1,
'largeIcon' => 'large_icon',
'smallIcon' => 'small_icon'
);
$fields = array
(
'registration_ids' => $registrationIds,
'data' => $msg
);
$headers = array
(
'Authorization: key=' . API_ACCESS_KEY,
'Content-Type: application/json'
);
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, 'https://android.googleapis.com/gcm/send');
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($fields));
$result = curl_exec($ch);
curl_close($ch);
$res = json_decode($result);
$flag = $res->success;
if($flag >= 1){
header('Location: index.php?success');
}else{
header('Location: index.php?failure');
}
}
Source: Google Cloud Messaging Tutorial
来源：谷歌云消息教程
回答by Kunal Soneta
Following code work for me to send notification to all registered users:
以下代码适用于我向所有注册用户发送通知：
<?php
header("Access-Control-Allow-Origin: *");
$db_host = 'localhost'; //hostname
$db_user = ''; // username
$db_password = ''; // password
$db_name = ''; //database name
$link = mysqli_connect($db_host,$db_user,$db_password, $db_name);
$query = "select * from device_notification_id";
$result = mysqli_query ($link,$query);
while($row=mysqli_fetch_array($result)){
$device_to[] = $row[device_id];
}
if(isset($_POST['submit'])){
$title=$_POST['title'];
$message=$_POST['message'];
for($i=0 ; $i< sizeof($device_to) ; $i++)
{
//echo $to[$i];
$to = $device_to[$i];
sendPush($to,$title,$message);
}
}
function sendPush($to,$title,$message)
{
// API access key from Google API's Console
// replace API
define( 'API_ACCESS_KEY', 'AIdfSyCd8ha2wop84LKtpQvRmCEiY8ZLpeTg2-o');
$registrationIds = array($to);
$msg = array
(
'message' => $message,
'title' => $title,
'vibrate' => 1,
'sound' => 1
// you can also add images, additionalData
);
$fields = array
(
'registration_ids' => $registrationIds,
'data' => $msg
);
$headers = array
(
'Authorization: key=' . API_ACCESS_KEY,
'Content-Type: application/json'
);
$ch = curl_init();
curl_setopt( $ch,CURLOPT_URL, 'https://android.googleapis.com/gcm/send' );
curl_setopt( $ch,CURLOPT_POST, true );
curl_setopt( $ch,CURLOPT_HTTPHEADER, $headers );
curl_setopt( $ch,CURLOPT_RETURNTRANSFER, true );
curl_setopt( $ch,CURLOPT_SSL_VERIFYPEER, false );
curl_setopt( $ch,CURLOPT_POSTFIELDS, json_encode( $fields ) );
$result = curl_exec($ch );
curl_close( $ch );
echo $result;
}
?>
<html>
<form method="POST">
<input type="text" name="title">
<input type="text" name="message">
<input type="submit" name="submit" value="submit">
</form>
</html>