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我目前正在Xamarin中开发一个Android应用程序。我正在使用 AWS SNS Push 和 Google Cloud Messenger （GCM）。

我一直在非常密切地关注这个演练：http://docs.aws.amazon.com/mobile/sdkforxamarin/developerguide/getting-started-sns-android.html

我一直在使用的代码与那里的代码非常相似。但是，我有一个注册意向服务，其工作原理如下：

  [Service(Exported = false)]
  public class RegistrationIntentService : IntentService
  {
    private static object locker = new object();
    public RegistrationIntentService() : base("RegistrationIntentService") { }
    protected override void OnHandleIntent(Intent intent)
    {
        try
        {
            Logging.LogMessage(Application, "RegistrationIntentService", "Calling InstanceID.GetToken", LogType.Debug);
            lock (locker)
            {
                var instanceID = InstanceID.GetInstance(Application.Context);
                Constants.token = instanceID.GetToken(
                    Constants.senderId, GoogleCloudMessaging.InstanceIdScope, null);
                Logging.LogMessage(Application, "RegistrationIntentService", "GCM Registration Token: " + Constants.token, LogType.Debug);
                /*SendRegistrationToAppServer(token).GetAwaiter().GetResult();
                Log.Info("RegistrationIntentService", "Registered");*/
                SendRegistrationToAppServer(Constants.token).GetAwaiter().GetResult();
                Logging.LogMessage(Application, "RegistrationIntentService", "Registered", LogType.Debug);
                Subscribe(Constants.token);
            } // Release lock
        }
        catch (Exception e)
        {
            Logging.LogMessage(Application, "RegistrationIntentService", "Failed to get a registration token. Exception:n" + e.ToString(), LogType.Error);
        }
    }
    private async System.Threading.Tasks.Task SendRegistrationToAppServer(string token)
    {
        var config = new AmazonSimpleNotificationServiceConfig()
        {
            RegionEndpoint = RegionEndpoint.USEast1
        };
        var credentials = new BasicAWSCredentials(Constants.accessKeyId, Constants.secretAccessKey);
        Constants.client = new AmazonSimpleNotificationServiceClient(credentials, config);
        Logging.LogMessage(this, "RegistrationIntentService.SendRegistrationToAppServer", "Created client", LogType.Debug);
        if (Constants.createdEndpoint == null)
        {
            var endpoint = new CreatePlatformEndpointRequest()
            {
                PlatformApplicationArn = Constants.endPoint,
                Token = token
            };
            var endpointResponse = await Constants.client.CreatePlatformEndpointAsync(endpoint);
            Logging.LogMessage(this, "RegistrationIntentService.SendRegistrationToAppServer", "Got endpoint. ARN: " + endpointResponse.EndpointArn, LogType.Debug);
            Constants.createdEndpoint = endpointResponse.EndpointArn;
        }
        // Make sure we haven't subscribed yet
        if (Constants.createdEndpoint != null && Constants.subscriptionArn == null)
        {
            var subscription = await Constants.client.SubscribeAsync(Constants.topicARNBeginning + Constants.devicePhoneNumber, "Application", Constants.createdEndpoint);
            Logging.LogMessage(this, "RegistrationIntentService.SendRegistrationToAppServer", "AWS Subscribed", LogType.Debug);
        }
    }
    private bool Subscribe(string token)
    {
        var pubSub = GcmPubSub.GetInstance(Application.Context);
        const string topic = "/topics/global";
        try
        {
            pubSub.Subscribe(token, topic, null);
            Logging.LogMessage(this, "RegistrationIntentService.Subscribe", "GCM Subscribed", LogType.Debug);
            return true;
        }
        catch (Java.IO.IOException)
        {
            try
            {
                pubSub.Unsubscribe(token, topic);
                pubSub.Subscribe(token, topic, null);
                return true;
            }
            catch (Java.IO.IOException)
            {
                Logging.LogMessage(Application, "Subscribe", "Failed to register", LogType.Error);
                return false;
            }
        }
    }
}

我使用 MainActivity OnCreate 事件处理程序中的 StartService（） 调用显式启动注册意图服务。我确保我设置了文档中要求的所有权限：

[assembly: UsesPermission(Android.Manifest.Permission.ReceiveBootCompleted)]
[assembly: UsesPermission (Android.Manifest.Permission.Internet)]
[assembly: UsesPermission (Android.Manifest.Permission.WakeLock)]
[assembly: UsesPermission(Android.Manifest.Permission.Vibrate)]
[assembly: UsesPermission("com.google.android.c2dm.permission.RECEIVE")]
[assembly: Permission(Name = "@PACKAGE_NAME@.permission.C2D_MESSAGE", ProtectionLevel = Protection.Signature)]
[assembly: UsesPermission("@PACKAGE_NAME@.permission.C2D_MESSAGE")]
[assembly: UsesPermission("com.google.android.c2dm.permission.SEND")]

我通过AssemblyInfo和适当的C#属性（例如[Service]属性）创建大部分Android清单.cs。我在XML（应用程序除外）中显式声明的唯一内容如下：

<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.gcmmessaging" />
        </intent-filter>
    </receiver>

以下是最终清单：

<?xml version="1.0" encoding="UTF-8"?>
<manifest android:installLocation="auto" android:versionName="1.0" android:versionCode="1" package="com.gcmmessaging" xmlns:android="http://schemas.android.com/apk/res/android">
    <uses-sdk android:minSdkVersion="16"/>
    <uses-permission android:name="android.permission.INTERNET"/>
    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
<permission android:name="com.gcmmessaging.permission.C2D_MESSAGE" android:protectionLevel="signature"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>
<uses-permission android:name="android.permission.READ_PHONE_STATE"/>
<uses-permission android:name="com.google.android.c2dm.permission.RECEIVE"/>
<uses-permission android:name="android.permission.WAKE_LOCK"/>
<uses-permission android:name="android.permission.VIBRATE"/>
<uses-permission android:name="com.gcmmessaging.permission.C2D_MESSAGE"/>
<uses-permission android:name="com.google.android.c2dm.permission.SEND"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>
<application android:name="mono.android.app.Application"
             android:allowBackup="true"
             android:debuggable="true"
             android:icon="@drawable/sns_icon_48"
             android:label="ProductName">
             <receiver android:name="com.google.android.gms.gcm.GcmReceiver"
                    android:permission="com.google.android.c2dm.permission.SEND"
                    android:exported="true">
                    <intent-filter>
                        <action android:name="com.google.android.c2dm.intent.RECEIVE"/>
                        <action android:name="com.google.android.c2dm.intent.REGISTRATION"/>
                        <category android:name="com.gcmmessaging"/>
                    </intent-filter>
            </receiver>
            <meta-data android:name="com.google.android.gms.version"
                        android:value="@integer/google_play_services_version"/>
            <activity android:name="[ConfigurationName]"
                        android:label="Configuration"/>
            <receiver android:name="md503b8085957a5cb3d4167d0e7cbb2a6b0.GCMBootReceiver">
                <intent-filter>
                    <action android:name="android.intent.action.BOOT_COMPLETED"/>
                </intent-filter>
            </receiver>
            <service android:name="md503b8085957a5cb3d4167d0e7cbb2a6b0.GCMIntentService" android:exported="false"/>
            <receiver android:name="md503b8085957a5cb3d4167d0e7cbb2a6b0.GCMBroadcastReceiver" android:permission="com.google.android.c2dm.permission.SEND">
                <!-- It did occur to me to try to put all of these in a single  -->
                <intent-filter>
                    <action android:name="com.google.android.c2dm.intent.RECEIVE"/>
                    <category android:name="com.gcmmessaging"/>
                    </intent-filter>
                <intent-filter>
                    <action android:name="com.google.android.c2dm.intent.REGISTRATION"/>
                    <category android:name="com.gcmmessaging"/>
                </intent-filter>
                <intent-filter>
                    <action android:name="com.google.android.gcm.intent.RETRY"/>
                    <category android:name="com.gcmmessaging"/>
                </intent-filter>
            </receiver>
            <activity android:name="[Activityname]" android:label="History"/>
            <service android:name="md503b8085957a5cb3d4167d0e7cbb2a6b0.MyInstanceIdListenerService" android:exported="false">
                <intent-filter>
                    <action android:name="com.google.android.gms.iid.InstanceID"/>
                </intent-filter>
            </service>
            <activity android:name="[ActivityName]" android:icon="@drawable/sns_icon_32" android:label="ProductName">
                <intent-filter>
                    <action android:name="android.intent.action.MAIN"/>
                    <category android:name="android.intent.category.LAUNCHER"/>
                </intent-filter>
            </activity>
            <service android:name="md503b8085957a5cb3d4167d0e7cbb2a6b0.RegistrationIntentService" android:exported="false"/>
            <receiver android:name="md5343e36a1bb0d551a047a1a24886e23d0.NetworkReachability_NetworkStatusChangeBroadcastReceiver"/>
            <provider android:name="com.google.android.gms.measurement.AppMeasurementContentProvider" android:exported="false" android:authorities="com.gcmmessaging.google_measurement_service"/>
            <service android:name="com.google.android.gms.measurement.AppMeasurementService" android:exported="false" android:enabled="true"/>
            <receiver android:name="com.google.android.gms.measurement.AppMeasurementReceiver" android:enabled="true">
                <intent-filter>
                    <action android:name="com.google.android.gms.measurement.UPLOAD"/>
                </intent-filter>
            </receiver>
            <provider android:name="mono.MonoRuntimeProvider" android:exported="false" android:authorities="com.gcmmessaging.mono.MonoRuntimeProvider.__mono_init__" android:initOrder="2147483647"/>
    <!--suppress ExportedReceiver-->
    <receiver android:name="mono.android.Seppuku">
        <intent-filter>
            <action android:name="mono.android.intent.action.SEPPUKU"/>
            <category android:name="mono.android.intent.category.SEPPUKU.com.gcmmessaging"/>
        </intent-filter>
    </receiver>
</application>
</manifest>

这是我的广播接收器：

[BroadcastReceiver(Permission = "com.google.android.c2dm.permission.SEND")]
[IntentFilter(new string[] {
  "com.google.android.c2dm.intent.RECEIVE"}, Categories = new string[] {
  "@PACKAGE_NAME@" })]
[IntentFilter(new string[] {
  "com.google.android.c2dm.intent.REGISTRATION"}, Categories = new string[] {
  "@PACKAGE_NAME@" })]
[IntentFilter(new string[] {
  "com.google.android.gcm.intent.RETRY"}, Categories = new string[] {
  "@PACKAGE_NAME@" })]
public class GCMBroadcastReceiver : WakefulBroadcastReceiver
{
    //private const string TAG = "PushHandlerBroadcastReceiver";
    public override void OnReceive(Context context, Intent intent)
    {
        Logging.LogMessage(context, "GCMBroadcastReceiver.OnReceive", "Received message", LogType.Debug);
        GCMIntentService.RunIntentInService(context, intent);
        SetResult(Result.Ok, null, null);
        Logging.LogMessage(context, "GCMBroadcastReceiver.OnReceive", "Ran intent service", LogType.Debug);
    }
}

我目前收到一个GCM令牌，并正确订阅了GCM和SNS。我仔细检查了那里的返回代码，我肯定得到了一个看起来有效的 GCM 令牌，我的订阅显示在 SNS 中。我订阅 GCM 的调用成功，没有引发任何异常。但是，我实际上没有收到任何推送。我知道AWS实际上正在发布数据（如果我创建电子邮件订阅，我会收到我发送的所有内容）。我也知道这些问题不是由我的公司防火墙引起的 - 如果我尝试通过 4G 执行此操作，它也会失败。

我的日志中确实收到以下两个错误：03-11 16：33：08.914 E/GcmReceiver（ 7749）： 无法解析目标意图服务，跳过类名强制03-11 16：33：08.914 E/GcmReceiver（ 7749）： 传递消息时出错：找不到服务意图。

我不确定这些是否是原因。我还没有能够在网上找到解决这些问题的好方法。

有人对尝试什么（或如何调试）有任何建议？说实话，我在这里有点不知所措。

您正在混合 API，一方面您使用新的 InstanceId API 来获取令牌，另一方面您使用带有唤醒广播接收器接收数据的旧方式，将您的接收器替换为来自 GcmListenerService 的派生类型，如下所示：

[Service (Exported = false), IntentFilter (new [] { "com.google.android.c2dm.intent.RECEIVE" })]
public class SignalGCMReceiver : GcmListenerService
{
    public override void OnMessageReceived (string from, Bundle data)
    {
        Console.WriteLine(data.ToString());
    }
}

最后在清单上添加接收器（接收器由服务内部实现）：

    <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="@PACKAGE_NAME@" />
        </intent-filter>
    </receiver>

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