I’m new to android and I’m trying to develop push notification in my app.

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Editorial Team

Asked: June 18, 20262026-06-18T08:18:55+00:00 2026-06-18T08:18:55+00:00

I’m new to android and I’m trying to develop push notification in my app.

0

I’m new to android and I’m trying to develop push notification in my app.

I had read so many post and able to generate device registration key and authentication key.

but when I’m trying to send push notification message to device i got following message.

<HTML>
<HEAD>
<TITLE>Unauthorized</TITLE>
</HEAD>
<BODY BGCOLOR="#FFFFFF" TEXT="#000000">
<H1>Unauthorized</H1>
<H2>Error 401</H2>
</BODY>
</HTML>

and following is php code which I’m using to send message:

function sendMessageToPhone($authCode, $deviceRegistrationId, $msgType, $messageText) {

$headers = array('Authorization: GoogleLogin auth=' . $authCode);
$data = array(
    'registration_id' => $deviceRegistrationId,
    'collapse_key' => $msgType,
    'data.message' => $messageText //TODO Add more params with just simple data instead           
);

$ch = curl_init();

curl_setopt($ch, CURLOPT_URL, "https://android.apis.google.com/c2dm/send");
if ($headers)
    curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, $data);


$response = curl_exec($ch);

curl_close($ch); 

echo "<pre>";
print_r($response); die;

}

sendMessageToPhone($auth_token, $device_id , "UTF-8","hello");

I had also enable “Google Cloud Messaging for Android” service by emaid which I had used to generate authentication token.