[英]Send GCM Push Notification to device
我正在尝试开发Xamarin Android应用,该应用使用GCM服务发送推送通知。
我遵循了Xamarin教程页面上介绍的教程,该教程教导了如何注册GCM,请求设备令牌以及如何创建消息发送者。
一切正常,除了我想向令牌特别是x的特定设备发送推送消息,而不是向所有设备发送。
消息发送方如下所示:
private static void messageSender(string title, string message, string summary)
{
var jGcmData = new JObject();
var jData = new JObject();
jData.Add("message", message);
jData.Add("title", title);
jData.Add("summary", summary);
jGcmData.Add("to", "/topics/global");
jGcmData.Add("data", jData);
var url = new Uri("https://gcm-http.googleapis.com/gcm/send");
try
{
using (var client = new HttpClient())
{
client.DefaultRequestHeaders.Accept.Add(
new MediaTypeWithQualityHeaderValue("application/json"));
client.DefaultRequestHeaders.TryAddWithoutValidation(
"Authorization", "key=" + API_KEY);
Task.WaitAll(client.PostAsync(url,
new StringContent(jGcmData.ToString(), Encoding.Default, "application/json"))
.ContinueWith(response =>
{
Console.WriteLine(response);
Console.WriteLine("Message sent: check the client device notification tray.");
}));
}
}
catch (Exception e)
{
Console.WriteLine("Unable to send GCM message:");
Console.Error.WriteLine(e.StackTrace);
}
}
有什么帮助吗?
*client side*
private void SendNotification()
{
var jGcmData = new JObject();
var jData = new JObject();
jData.Add("title", txtTitle.Text);
jData.Add("message", txtMessage.Text);
jData.Add("summary", txtSummary.Text);
jGcmData.Add("to", "/topics/global");
jGcmData.Add("data", jData);
var url = new Uri("https://gcm-http.googleapis.com/gcm/send");
try
{
using (var client = new HttpClient())
{
client.DefaultRequestHeaders.Accept.Add(
new MediaTypeWithQualityHeaderValue("application/json"));
client.DefaultRequestHeaders.TryAddWithoutValidation(
"Authorization", "key=" + API_KEY);
Task.WaitAll(client.PostAsync(url,
new StringContent(jGcmData.ToString(), Encoding.Default, "application/json"))
.ContinueWith(response =>
{
Console.WriteLine(response);
Console.WriteLine("Message sent: check the client device notification tray.");
}));
}
}
catch (Exception ex)
{
Console.WriteLine("Unable to send GCM message:");
Console.Error.WriteLine(ex.StackTrace);
}
}
*phone side*
public override void OnMessageReceived(string from, Bundle data)
{
var message = data.GetString("message");
var title = data.GetString("title");
var summary = data.GetString("summary");
Log.Debug("MyGcmListenerService", "From: " + from);
Log.Debug("MyGcmListenerService", "Message: " + message);
Log.Debug("MyGcmListenerService", "Title: " + title);
Log.Debug("MyGcmListenerService", "Summary: " + summary);
SendNotification(message, title, summary);
}
void SendNotification(string message,string title,string summary)
{
var intent = new Intent(this, typeof(MainActivity));
intent.AddFlags(ActivityFlags.ClearTop);
var pendingIntent = PendingIntent.GetActivity(this, 0, intent, PendingIntentFlags.OneShot);
var notificationBuilder = new Notification.Builder(this)
.SetSmallIcon(Resource.Drawable.aalogo2)
.SetContentTitle(title)
.SetContentText(message)
.SetSubText(summary)
.SetAutoCancel(true)
.SetContentIntent(pendingIntent);
var notificationManager = (NotificationManager)GetSystemService(Context.NotificationService);
notificationManager.Notify(0, notificationBuilder.Build());
}
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