我正在尝试在我的 Xamarin.Forms 项目中通过 GCM 实现通知。这是我的代码
主 Activity
using Android.App;
using Android.Content.PM;
using Android.OS;
using Android.Gms.Common;
using Android.Content;
namespace AIA.Droid
{
[Activity (Theme = "@style/MyTheme",
ConfigurationChanges = ConfigChanges.ScreenSize | ConfigChanges.Orientation)]
public class MainActivity : global::Xamarin.Forms.Platform.Android.FormsApplicationActivity
{
protected override void OnCreate (Bundle bundle)
{
base.OnCreate (bundle);
global::Xamarin.Forms.Forms.Init (this, bundle);
LoadApplication (new AIA.App ());
var x = typeof(Xamarin.Forms.Themes.DarkThemeResources);
x = typeof(Xamarin.Forms.Themes.LightThemeResources);
x = typeof(Xamarin.Forms.Themes.Android.UnderlineEffect);
if (IsPlayServicesAvailable())
{
var intent = new Intent(this, typeof(RegistrationIntentService));
StartService(intent);
}
}
public bool IsPlayServicesAvailable()
{
int resultCode = GoogleApiAvailability.Instance.IsGooglePlayServicesAvailable(this);
if (resultCode != ConnectionResult.Success)
return false;
else
return true;
}
}
}
我的 RegistrationIntentService.cs
这里 ************ 是我从 Google Play API 控制台收到的申请编号
using System;
using Android.App;
using Android.Content;
using Android.Util;
using Android.Gms.Gcm;
using Android.Gms.Gcm.Iid;
namespace AIA.Droid
{
[Service(Exported = false)]
class RegistrationIntentService : IntentService
{
static object locker = new object();
public RegistrationIntentService() : base("RegistrationIntentService") { }
protected override void OnHandleIntent(Intent intent)
{
try
{
Log.Info("RegistrationIntentService", "Calling InstanceID.GetToken");
lock (locker)
{
var instanceID = InstanceID.GetInstance(this);
var token = instanceID.GetToken(
"************", GoogleCloudMessaging.InstanceIdScope, null);
Log.Info("RegistrationIntentService", "GCM Registration Token: " + token);
SendRegistrationToAppServer(token);
Subscribe(token);
}
}
catch (Exception e)
{
Log.Debug("RegistrationIntentService", "Failed to get a registration token");
return;
}
}
void SendRegistrationToAppServer(string token)
{
// Add custom implementation here as needed.
}
void Subscribe(string token)
{
var pubSub = GcmPubSub.GetInstance(this);
pubSub.Subscribe(token, "/topics/global", null);
}
}
}
我的 MyGcmListenerService.cs
using Android.App;
using Android.Content;
using Android.OS;
using Android.Gms.Gcm;
using Android.Util;
namespace AIA.Droid
{
[Service(Exported = false), IntentFilter(new[] { "com.google.android.c2dm.intent.RECEIVE" })]
public class MyGcmListenerService : GcmListenerService
{
public override void OnMessageReceived(string from, Bundle data)
{
var message = data.GetString("message");
Log.Debug("MyGcmListenerService", "From: " + from);
Log.Debug("MyGcmListenerService", "Message: " + message);
SendNotification(message);
}
void SendNotification(string message)
{
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.Icon)
.SetContentTitle("Akola Industries Association")
.SetContentText(message)
.SetDefaults(NotificationDefaults.Sound)
.SetContentIntent(pendingIntent);
var notificationManager = (NotificationManager)GetSystemService(Context.NotificationService);
notificationManager.Notify(0, notificationBuilder.Build());
}
}
}
最后是我的 AndroidMainfeast
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.AIA.Droid" android:installLocation="auto" android:versionCode="1" android:versionName="1.0">
<uses-sdk android:minSdkVersion="16" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="com.google.android.c2dm.permission.RECEIVE" />
<uses-permission android:name="android.permission.WAKE_LOCK" />
<uses-permission android:name="com.AIA.Droid.permission.C2D_MESSAGE" />
<uses-permission android:name="android.permission.BIND_NOTIFICATION_LISTENER_SERVICE"></uses-permission>
<permission android:name="com.AIA.Droid.permission.C2D_MESSAGE" android:protectionLevel="signature" />
<application android:label="AIA" android:icon="@drawable/Icon">
<receiver android:name="com.google.android.gms.gcm.GcmReceiver"
android:exported="true"
android:permission="com.google.android.c2dm.permission.SEND">
<intent-filter>
<action android:name="com.google.android.c2dm.intent.RECEIVE" />
<action android:name="com.google.android.c2dm.intent.REGISTRATION" />
<category android:name="com.AIA.Droid" />
</intent-filter>
</receiver>
</application>
</manifest>
上述所有代码都在我的客户端应用程序中，用于接收通知
现在这是我发送消息的代码
using System;
using System.Net.Http;
using System.Net.Http.Headers;
using System.Text;
using System.Threading.Tasks;
using Newtonsoft.Json.Linq;
namespace MessageSender
{
class Program
{
public const string API_KEY = "My_API_Key";
public const string MESSAGE = "Welcome to AIA";
static void Main(string[] args)
{
var jGcmData = new JObject();
var jData = new JObject();
jData.Add("message", MESSAGE);
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);
}
}
}
}
服务器响应
Id = 13, Status = RanToCompletion, Method = "{null}", Result = "StatusCode: 200, ReasonPhrase: 'OK', Version: 1.1, Content: System.Net.Http.StreamContent, Headers:\r\n{\r\n X-Content-Type-Options: nosniff\r\n X-Frame-Options: SAMEORIGIN\r\n X-XSS-Protection: 1; mode=block\r\n Alt-Svc: quic=\":443\"; ma=2592000; v=\"36,35,34,33,32\"\r\n Vary: Accept-Encoding\r\n Transfer-Encoding: chunked\r\n Accept-Ranges: none\r\n Cache-Control: max-age=0, private\r\n Date: Tue, 25 Oct 2016 05:02:12 GMT\r\n Server: GSE\r\n Content-Type: application/json; charset=UTF-8\r\n Expires: Tue, 25 Oct 2016 05:02:12 GMT\r\n}"
我不明白我哪里错了。
请帮忙 阿米特·萨拉夫
最佳答案
这个链接对我理解GCM推送通知的过程有很大帮助，你也可以使用POSTMAN来测试推送通知的发送:
http://forums.xamarin.com/discussion/comment/217083/#Comment_217083
How to use Push Notifications in Xamarin Forms
关于c# - xamarin.forms GCM 未接收消息，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/40232106/