How to set GCM priority with Azure Notification Hub - azure

Question

I am currently using Azure Push Notification Service to send messages to android phones. According to This link you can set the priority of a GCM message to help deal with apps in Doze mode.
Here is how I currently use it:
string content = JsonConvert.SerializeObject(new GCMCarrier(data));
result = await Gethub().SendGcmNativeNotificationAsync(content, toTag);
here is GCMCarrier
public class GCMCarrier
{
public GCMCarrier(Object _data)
{
data = _data;
}
}
Now how do I add priority to the message? The constructor to send a GCM only has a data parameter?
Or can I simply add it to my `GCMCarrier" object along with data?

Answer 1

Give a try to the way someone use - add the Priority field to the payload. It was discussed recently in the Github repository as the issue. Windows Phone has that functionality in the SDK, while it looks like the Android does not. But Notification Hubs, AFAIK, is pass-through mechanism, so the payload will be treated by GCM itself.

Answer 2

You can enhance your current model and add required properties in correct format and then convert it to json payload.
public class GcmNotification
{
[JsonProperty("time_to_live")]
public int TimeToLiveInSeconds { get; set; }
public string Priority { get; set; }
public NotificationMessage Data { get; set; }
}
public class NotificationMessage
{
public NotificationDto Message { get; set; }
}
public class NotificationDto
{
public string Key { get; set; }
public string Value { get; set; }
}
Now you can convert your data with json converter but remember use lowercase setting in JsonConverter otherwise there might be expection on device. I have implementation of this in LowercaseJsonSerializer class.
private void SendNotification(GcmNotification gcmNotification,string tag)
{
var payload = LowercaseJsonSerializer.SerializeObject(gcmNotification);
var notificationOutcome = _hubClient.SendGcmNativeNotificationAsync(payload, tag).Result;
}
public class LowercaseJsonSerializer
{
private static readonly JsonSerializerSettings Settings = new JsonSerializerSettings
{
ContractResolver = new LowercaseContractResolver()
};
public static string SerializeObject(object o)
{
return JsonConvert.SerializeObject(o,Settings);
}
public class LowercaseContractResolver : DefaultContractResolver
{
protected override string ResolvePropertyName(string propertyName)
{
return propertyName.ToLower();
}
}
}