Android Question B4A Firebase Push Notifications 2023+ Sending

[hanyelmehy]

how to send Firebase Push Notifications 2023+ Message from B4A
i use this (https://www.b4x.com/android/forum/threads/b4x-firebase-push-notifications-2023.148715/)
B4J work fine for sending ,when try same code with B4A get (java.lang.ClassNotFoundException: com.google$auth$oauth2$GoogleCredentials) error when GetTokenValue

 

[asales]

You can't.
Check this thread:

Send notification from app

Hi everyone. I have some working apps that receive notifications, and to test them I use b4j and everything works. I was wondering if I wanted to send notifications from a B4X app can I use the same method that is used in b4j? Can anyone give me a tip on how to send notifications from the app...

www.b4x.com

 

[javiito]

Hi,
So, there is no way to send push messages from android application like before? I am confused because in the ititial forum ([B4X] Firebase Push Notifications 2023+) someone says that it works for him in an b4a application.
Thanks!

 

[asales]

Hi,
So, there is no way to send push messages from android application like before?

No.

I am confused because in the ititial forum ([B4X] Firebase Push Notifications 2023+) someone says that it works for him in an b4a application.
Thanks!

For now, I think the final answer is this from Erel:
"The underlying libraries are not compatible with Android."

 

[TILogistic]

Firebase General Send Functions in Using APIs in PHP
ref.

https://firebase.google.com/docs/reference/rest/auth

<?php
function signUp($email, $password) {
    $url = 'https://identitytoolkit.googleapis.com/v1/accounts:signUp?key=[API_KEY]';
    $data = json_encode([
        'email' => $email,
        'password' => $password,
        'returnSecureToken' => true
    ]);

    $options = [
        'http' => [
            'header'  => "Content-type: application/json\r\n",
            'method'  => 'POST',
            'content' => $data,
        ],
    ];

    $context  = stream_context_create($options);
    $result = file_get_contents($url, false, $context);
    return json_decode($result);
}

$response = signUp('[email protected]', 'user_password');
print_r($response);
?>

<?php
function signIn($email, $password) {
    $url = 'https://identitytoolkit.googleapis.com/v1/accounts:signInWithPassword?key=[API_KEY]';
    $data = json_encode([
        'email' => $email,
        'password' => $password,
        'returnSecureToken' => true
    ]);

    $options = [
        'http' => [
            'header'  => "Content-type: application/json\r\n",
            'method'  => 'POST',
            'content' => $data,
        ],
    ];

    $context  = stream_context_create($options);
    $result = file_get_contents($url, false, $context);
    return json_decode($result);
}

$response = signIn('[email protected]', 'user_password');
print_r($response);
?>

<?php
function verifyIdToken($idToken) {
    $url = 'https://identitytoolkit.googleapis.com/v1/accounts:lookup?key=[API_KEY]';
    $data = json_encode([
        'idToken' => $idToken
    ]);

    $options = [
        'http' => [
            'header'  => "Content-type: application/json\r\n",
            'method'  => 'POST',
            'content' => $data,
        ],
    ];

    $context  = stream_context_create($options);
    $result = file_get_contents($url, false, $context);
    return json_decode($result);
}

$response = verifyIdToken('ID_TOKEN_FROM_CLIENT');
print_r($response);
?>

<?php
function sendNotification($to, $title, $body) {
    $url = 'https://fcm.googleapis.com/fcm/send';
    $apiKey = 'YOUR_SERVER_KEY';

    $fields = json_encode([
        'to' => $to,
        'notification' => [
            'title' => $title,
            'body' => $body
        ]
    ]);

    $headers = [
        'Authorization: key=' . $apiKey,
        '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);
    if ($result === FALSE) {
        die('Curl failed: ' . curl_error($ch));
    }

    curl_close($ch);
    return $result;
}

$response = sendNotification('DEVICE_TOKEN', 'Test Title', 'Test Body');
print_r($response);
?>

 

[aeric]

I think it is not a good idea to use Android or B4A app as a sending tool because it expose to a bad actor can extract the json file and create another app to send notification or message to the users of the original app.

It is more secure to let another server do the sending job.

B4A just need to call this server to make the API call to Firebase and send the message.

 

[javiito]

No.

For now, I think the final answer is this from Erel:
"The underlying libraries are not compatible with Android."

Ok. Thanks. I have been trying things. The problem is only getting the token. If I retrieve the token with the B4J function, the rest works in android

 

[javiito]

Hi again. With the new information from Erel, I still ges an error when trying to get the token. The error arises when this line is executed:

GoogleCredentials.InitializeStatic("com.google.auth.oauth2.GoogleCredentials"):

java.lang.NoClassDefFoundError: Failed resolution of: Ljava/time/Duration;
at com.google.auth.oauth2.OAuth2Credentials.<clinit>(OAuth2Credentials.java:70)
at java.lang.Class.classForName(Native Method)
...

Any help?