UPDATE
Please ensure you use https:// to call the Google fcm api. "Out of the sudden" one of my apps didn't work anymore
I use php for all my server stuff so here is an updated tutorial how to use php to send messages to devices.
1. Follow Erel's instructions to set up Firebase Messaging and download the example.
https://www.b4x.com/android/forum/t...s-firebase-cloud-messaging-fcm.67716/#content
2. Add the log line to the example to see the device's token (you need to copy it later)
Inside the logs you'll see a long string (=token) like this:
By subscribing every device will get a unique token which is used to send a message to THIS device.
3. Copy the php script into an own folder (I've called mine "FCM") inside the htdocs folder of your php installation. I use XAMPP for my tests (no production server is needed). Change "API_ACCESS_KEY" to the one of your project (see Erel's tutorial).
In the array
you can use key/value pairs like you want to. Add more if needed.
4. Start Erel's example (debug), set a breakpoint at "fm_MessageArrived", copy the token to the clipboard. Open your browser and call the php like this:
Change the ip-address, too (can be a regular website when you use it in production)
Insert the copied token after "r=" and your app will receive the message at once:
As you can see, our key/value pairs arrive as a map. To get the contents of "message":
5. Improvements
Just call the php via httputils to send a message.
Usually you have more than one device and you do't know the tokens. So you need to store the token and some other unique identifier (email address/name/imei -> alias) into a database. So you can add to the script to store update the tokens. In another function you just call the script with the alias.
In one of my apps I store all messages to a table to check the status (sent, received). After the message arrives on the device I call the php to update the status to "received".
Hints:
There is no security here. Don't use this example 1:1 on your production server(s)! (use Google to search for how to secure a php script/MySql).
Please ensure you use https:// to call the Google fcm api. "Out of the sudden" one of my apps didn't work anymore
B4X:
$ch = curl_init();
curl_setopt( $ch,CURLOPT_URL, 'https://fcm.googleapis.com/fcm/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 );I use php for all my server stuff so here is an updated tutorial how to use php to send messages to devices.
1. Follow Erel's instructions to set up Firebase Messaging and download the example.
https://www.b4x.com/android/forum/t...s-firebase-cloud-messaging-fcm.67716/#content
2. Add the log line to the example to see the device's token (you need to copy it later)
B4X:
Public Sub SubscribeToTopics
fm.SubscribeToTopic("general") 'you can subscribe to more topics
Log (fm.Token)
End SubInside the logs you'll see a long string (=token) like this:
B4X:
dzHOKKmwoaeihf98482hfoih0h29hfifh092hfoifhohf309hffh2hfi3209t92hf2gn2dm2jd4029fj24fj29fj24f...........By subscribing every device will get a unique token which is used to send a message to THIS device.
3. Copy the php script into an own folder (I've called mine "FCM") inside the htdocs folder of your php installation. I use XAMPP for my tests (no production server is needed). Change "API_ACCESS_KEY" to the one of your project (see Erel's tutorial).
In the array
B4X:
$msg = array
(
'title' => $t,
'message' => $m,
'MyKey1' => 'MyData1',
'MyKey2' => 'MyData2',
);you can use key/value pairs like you want to. Add more if needed.
B4X:
<?php
$action=$_GET["Action"];
switch ($action) {
Case "M":
$r=$_GET["r"];
$t=$_GET["t"];
$m=$_GET["m"];
$j=json_decode(notify($r, $t, $m));
$succ=0;
$fail=0;
$succ=$j->{'success'};
$fail=$j->{'failure'};
print "Success: " . $succ . "<br>";
print "Fail : " . $fail . "<br>";
break;
default:
print json_encode ("Error: Function not defined ->" . $action);
}
function notify ($r, $t, $m)
{
// API access key from Google API's Console
if (!defined('API_ACCESS_KEY')) define( 'API_ACCESS_KEY', 'AIzasogs94sgjsjsg04......... );
$tokenarray = array($r);
// prep the bundle
$msg = array
(
'title' => $t,
'message' => $m,
'MyKey1' => 'MyData1',
'MyKey2' => 'MyData2',
);
$fields = array
(
'registration_ids' => $tokenarray,
'data' => $msg
);
$headers = array
(
'Authorization: key=' . API_ACCESS_KEY,
'Content-Type: application/json'
);
$ch = curl_init();
curl_setopt( $ch,CURLOPT_URL, 'fcm.googleapis.com/fcm/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 );
return $result;
}
?>4. Start Erel's example (debug), set a breakpoint at "fm_MessageArrived", copy the token to the clipboard. Open your browser and call the php like this:
B4X:
http://192.168.178.23/fcm/fcm.php?Action=M&t=Title&m=Message&r=dzHOKKmwsaj9a0e4jafja9jf49ajfa........Change the ip-address, too (can be a regular website when you use it in production)
Insert the copied token after "r=" and your app will receive the message at once:
B4X:
Message arrived
Message data: {MyKey1=MyData1, MyKey2=MyData2, title=Title, message=Message}As you can see, our key/value pairs arrive as a map. To get the contents of "message":
B4X:
Dim mess As String = Message.GetData.Get("message")5. Improvements
Just call the php via httputils to send a message.
Usually you have more than one device and you do't know the tokens. So you need to store the token and some other unique identifier (email address/name/imei -> alias) into a database. So you can add to the script to store update the tokens. In another function you just call the script with the alias.
In one of my apps I store all messages to a table to check the status (sent, received). After the message arrives on the device I call the php to update the status to "received".
Hints:
There is no security here. Don't use this example 1:1 on your production server(s)! (use Google to search for how to secure a php script/MySql).
Last edited:
