我有一个使用 GCM 推送通知的应用程序。它工作正常，我的设备注册并接收推送消息。
如果我从设备上卸载该应用程序，我将不再像您期望的那样收到消息。在我卸载应用程序后，您在服务器上发送消息的文本框仍然存在，这也是我所期望的。
我查看了有关取消注册的文档，您可以手动或自动完成。
The end user uninstalls the application.
The 3rd-party server sends a message to GCM server.
The GCM server sends the message to the device.
The GCM client receives the message and queries Package Manager about whether there are broadcast receivers configured to receive it, which returns false.
The GCM client informs the GCM server that the application was uninstalled.
The GCM server marks the registration ID for deletion.
The 3rd-party server sends a message to GCM.
The GCM returns a NotRegistered error message to the 3rd-party server.
The 3rd-party deletes the registration ID.
我不明白上面列表中的倒数第二句话。
The GCM returns a NotRegistered error message to the 3rd-party server.
这是如何实现的？
另外，如果应用程序从设备上卸载，它如何执行下面的语句？是否存在从设备中删除应用程序时执行的应用程序生命周期方法？如果有，这是否是放置代码的地方，通知 GCM 服务器卸载并调用 3rd 方服务器上的 php 脚本从数据库中删除 regID？
The GCM client informs the GCM server that the application was uninstalled.
提前致谢，
Matt
[edit1]
static void unregister(final Context context, final String regId) {
Log.i(TAG, "unregistering device (regId = " + regId + ")");
String serverUrl = SERVER_URL + "/unregister.php";
Map<String, String> params = new HashMap<String, String>();
params.put("regId", regId);
try {
post(serverUrl, params);
GCMRegistrar.setRegisteredOnServer(context, false);
String message = context.getString(R.string.server_unregistered);
CommonUtilities.displayMessage(context, message);
} catch (IOException e) {
// At this point the device is unregistered from GCM, but still
// registered in the server.
// We could try to unregister again, but it is not necessary:
// if the server tries to send a message to the device, it will get
// a "NotRegistered" error message and should unregister the device.
String message = context.getString(R.string.server_unregister_error,
e.getMessage());
CommonUtilities.displayMessage(context, message);
}
}
[编辑2]
下面的注销代码用于在从手机中删除应用程序后在第 3 方服务器上注销设备。该代码是对下面教程的补充。
tutorial
发送消息.php
<?php
if (isset($_GET["regId"]) && isset($_GET["message"])) {
$regId = $_GET["regId"];
$message = $_GET["message"];
$strRegID = strval($regId);
include_once './GCM.php';
include_once './db_functions.php';
$gcm = new GCM();
$registatoin_ids = array($regId);
$message = array("price" => $message);
$result = $gcm->send_notification($registatoin_ids, $message);
$db = new db_Functions();
if (strcasecmp ( strval($result) , 'NotRegistered' )) {
$db->deleteUser($strRegID);
}
}
?>
db_functions.php
public function deleteUser($regid) {
$strRegID = strval($regid);
$serverName = "LOCALHOST\SQLEXPRESS";
$uid = "gcm";
$pwd = "gcm";
$databaseName = "gcm";
$connectionInfo = array( "UID"=>$uid, "PWD"=>$pwd, "Database"=>$databaseName);
$db = sqlsrv_connect($serverName,$connectionInfo) or die("Unable to connect to server");
$query = "DELETE FROM gcmUser2 WHERE gcuRegID = '$regid'";
$result = sqlsrv_query($db, $query);
}
