SERVICE_NOT_AVAILABLE 同时使用 Xamarin for Android 注册 Google Cloud Messaging

Posted 2023-02-24

【中文标题】SERVICE_NOT_AVAILABLE 同时使用 Xamarin for Android 注册 Google Cloud Messaging

【英文标题】：SERVICE_NOT_AVAILABLE while registering Google Cloud Messaging with Xamarin for Android

【发布时间】：2013-10-15 04:03:29

【问题描述】：

我正在创建将 GCM 与 Xamarin 一起使用的 android 应用程序。 我关注了this guide from Xamarin team，然后是this guide from Google team

在我实现了 Gcm 的 Xamarin 版本之后，我的 BroadcaseReceiver.OnReceive 什么也没收到。这是清单和广播接收器

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
          android:installLocation="auto" 
          package="com.pushtest.droid" 
          android:versionCode="1" 
          android:versionName="1">

  <uses-sdk android:minSdkVersion="8" android:targetSdkVersion="15" />

  <uses-permission android:name="com.google.android.c2dm.permission.RECEIVE" />
  <uses-permission android:name="android.permission.GET_ACCOUNTS" />
  <uses-permission android:name="android.permission.INTERNET" />
  <uses-permission android:name="android.permission.WAKE_LOCK" />

  <permission android:name="com.pushtest.droid.permission.C2D_MESSAGE" android:protectionLevel="signature"/>
  <uses-permission android:name="com.pushtest.droid.permission.C2D_MESSAGE" />

  <application android:label="push droid"/>
</manifest>

广播接收者：

[BroadcastReceiver(Permission = "com.google.android.c2dm.permission.SEND")]
    [IntentFilter(new[] "com.google.android.c2dm.intent.RECEIVE", Categories = new[] "com.pushtest.droid")]
    [IntentFilter(new[] "com.google.android.c2dm.intent.REGISTRATION", Categories = new[] "com.pushtest.droid")]
    [IntentFilter(new[] "com.google.android.gcm.intent.RETRY", Categories = new[] "com.pushtest.droid")]
    public class MyGcmBroadcastReceiver : BroadcastReceiver
    
        public override void OnReceive(Context context, Intent intent)
        
            System.Diagnostics.Debug.WriteLine("MyGcmBroadcastReceiver.OnReceive");
            if (intent.Action == "com.google.android.c2dm.intent.REGISTRATION")
            
                var registrationId = intent.GetStringExtra("registration_id");
                var error = intent.GetStringExtra("error");
                var unregistered = intent.GetStringExtra("unregistered");
                System.Diagnostics.Debug.WriteLine("!!!! Registration status |R: 0|E: 1|U: 2", registrationId, error, unregistered);
            
            else if (intent.Action == "com.google.android.c2dm.intent.RECEIVE")
            
                System.Diagnostics.Debug.WriteLine("!!!! Push Received: |TBD|");
            
        
    

当我开始意图时，我什么也没得到 - 没有错误，没有调试信息，没有结果：

private void RegisterForGcm(Context context)
        
            const string SenderId = "PROJECT_ID_FROM_GOOGLE_CONSOLE";
            var appExtra = PendingIntent.GetBroadcast(context, 0, new Intent(), 0);

            var intent = new Intent("com.google.android.c2dm.intent.REGISTER");
            intent.PutExtra("app", appExtra);
            intent.PutExtra("sender", SenderId);
            context.StartService(intent);
        

然后我以为 Google 的指南终于得到了注册响应 error = "SERVICE_NOT_AVAILABLE"：

没有额外的字符串（没有registraion_id）。调试信息： ！！！！注册状态 |R: |E: SERVICE_NOT_AVAILABLE|U:

这是我的 Manifest 和 BroadcastReceiver（意图开始是相同的）：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
          android:installLocation="auto" 
          package="com.pushtest.droid" 
          android:versionCode="1" 
          android:versionName="1">

  <uses-sdk android:minSdkVersion="8" android:targetSdkVersion="15" />

  <uses-permission android:name="com.google.android.c2dm.permission.RECEIVE" />
  <uses-permission android:name="android.permission.GET_ACCOUNTS" />
  <uses-permission android:name="android.permission.INTERNET" />
  <uses-permission android:name="android.permission.WAKE_LOCK" />

  <permission android:name="com.pushtest.droid.permission.C2D_MESSAGE" android:protectionLevel="signature"/>
  <uses-permission android:name="com.pushtest.droid.permission.C2D_MESSAGE" />

  <application android:label="push droid">
    <receiver android:name="com.pushtest.droid.MyGcmBroadcastReceiver"
              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" />
        <action android:name="com.google.android.gcm.intent.RETRY" />

        <category android:name="com.pushtest.droid" />
      </intent-filter>
    </receiver>
  </application>
</manifest>

和BroadcastReceiver（没有任何属性）

 public class MyGcmBroadcastReceiver : BroadcastReceiver
    
        public override void OnReceive(Context context, Intent intent)
        
            System.Diagnostics.Debug.WriteLine("MyGcmBroadcastReceiver.OnReceive");
            if (intent.Action == "com.google.android.c2dm.intent.REGISTRATION")
            
                var registrationId = intent.GetStringExtra("registration_id");
                var error = intent.GetStringExtra("error");
                var unregistered = intent.GetStringExtra("unregistered");
                System.Diagnostics.Debug.WriteLine("!!!! Registration status |R: 0|E: 1|U: 2", registrationId, error, unregistered);
            
            else if (intent.Action == "com.google.android.c2dm.intent.RECEIVE")
            
                System.Diagnostics.Debug.WriteLine("!!!! Push Received: |TBD|");
            
        
    

此处的测试示例： https://dl.dropboxusercontent.com/u/19503836/pushtest-issue.zip

我在我的 Android 2.3.6 设备上尝试此代码 非常感谢任何帮助。

TIA！

【问题讨论】：

你的手机上有谷歌账号吗？

是的，我可以使用此配置的帐户访问 Google Play 商店

您是否已将此应用程序注册到 GCM 以获取 API 访问权限？您也可以将代码发布到您的意图服务吗？

是的，我在 google 控制台注册了我的项目并允许它使用 GCM。刚刚编辑了帖子并添加了源代码

***.com/questions/17188982/… 是一个密切相关的问题（如果不是重复的话）。

【参考方案1】：

您尚未创建 Service [IntentService ] 类。 正在启动服务但尚未创建该服务。BroadCastReceiver 将如下所示：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

using Android.App;
using Android.Content;
using Android.OS;
using Android.Runtime;
using Android.Views;
using Android.Widget;
namespace hellomultiscreen


    public class MyGCMBroadcastReceiver : BroadcastReceiver
    

        const string TAG = "PushHandlerBroadcastReceiver";
        public override void OnReceive(Context context, Intent intent)
        

            MyIntentService.RunIntentInService(context, intent);
            SetResult(Result.Ok, null, null);
            Toast.MakeText(context, "Received Message!", ToastLength.Short).Show();
        
    

Intent Service 如下所示

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

using Android.App;
using Android.Content;
using Android.OS;
using Android.Runtime;
using Android.Views;
using Android.Widget;
using Android.Support.V4.App;
using Android.Preferences;
using String = System.String;
namespace hellomultiscreen


    [Service]
    public class MyIntentService : IntentService
    
        static PowerManager.WakeLock sWakeLock;
        static object LOCK = new object();

       public static void RunIntentInService(Context context, Intent intent)
        
            lock (LOCK)
            
                if (sWakeLock == null)
                
                    // This is called from BroadcastReceiver, there is no init.
                    var pm = PowerManager.FromContext(context);
                    sWakeLock = pm.NewWakeLock(
                    WakeLockFlags.Partial, "My WakeLock Tag");
                
            

            sWakeLock.Acquire();
            intent.SetClass(context, typeof(MyIntentService));
            context.StartService(intent);
        

        protected override void OnHandleIntent(Intent intent)
        
            try
            
                Context context = this.ApplicationContext;
                string action = intent.Action;

                if (action.Equals("com.google.android.c2dm.intent.REGISTRATION"))
                
                   HandleRegistration( context,intent);
                
                else if (action.Equals("com.google.android.c2dm.intent.RECEIVE"))
                
                   HandleMessage(intent);
                
            
            finally
            
                lock (LOCK)
                
                    //Sanity check for null as this is a public method
                    if (sWakeLock != null)
                        sWakeLock.Release();
                
            
        
        private void HandleRegistration(Context context, Intent intent)
        
            String registration = intent.GetStringExtra("registration_id");
            if (intent.GetStringExtra("error") != null)
            
                // Registration failed, should try again later.
            
            else if (intent.GetStringExtra("unregistered") != null)
            
                // unregistration done, new messages from the authorized sender will be rejected
            
            else if (registration != null)
            

                string score = "Successful Login To Bullseye Account";
                long[] vibraPattern =  0, 500, 250, 500 ;

                Bundle valuesForActivity = new Bundle();
                valuesForActivity.PutString("score", score);

                // Create the PendingIntent with the back stack             
                // When the user clicks the notification, SecondActivity will start up.
                Intent resultIntent = new Intent(this, typeof(NotificationDetails));
                resultIntent.PutExtras(valuesForActivity); // Pass some values to SecondActivity.

                TaskStackBuilder stackBuilder = TaskStackBuilder.Create(this);
                stackBuilder.AddParentStack(Java.Lang.Class.FromType(typeof(NotificationDetails)));
                stackBuilder.AddNextIntent(resultIntent);

                PendingIntent resultPendingIntent = stackBuilder.GetPendingIntent(0, (int)PendingIntentFlags.UpdateCurrent);

                // Build the notification
                NotificationCompat.Builder builder = new NotificationCompat.Builder(this)
                    .SetAutoCancel(true) // dismiss the notification from the notification area when the user clicks on it
                    .SetContentIntent(resultPendingIntent) // start up this activity when the user clicks the intent.
                    .SetContentTitle(score) // Set the title
                    .SetNumber(1) // Display the count in the Content Info
                    .SetSmallIcon(Resource.Drawable.alert) // This is the icon to display
                    .SetVibrate(vibraPattern)

                    .SetContentText(score); // the message to display.

                // Finally publish the notification
                NotificationManager notificationManager = (NotificationManager)GetSystemService(Context.NotificationService);
                notificationManager.Notify(1, builder.Build());

            
        
        private void HandleMessage(Intent intent)
        
            try
            
                string score = intent.GetStringExtra("message");
                long[] vibraPattern =  0, 500, 250, 500 ;

                Bundle valuesForActivity = new Bundle();
                valuesForActivity.PutString("score", score);

                // Create the PendingIntent with the back stack             
                // When the user clicks the notification, SecondActivity will start up.
                Intent resultIntent = new Intent(this, typeof(NotificationDetails));
                resultIntent.PutExtras(valuesForActivity); // Pass some values to SecondActivity.

                TaskStackBuilder stackBuilder = TaskStackBuilder.Create(this);
                stackBuilder.AddParentStack(Java.Lang.Class.FromType(typeof(NotificationDetails)));
                stackBuilder.AddNextIntent(resultIntent);

                PendingIntent resultPendingIntent = stackBuilder.GetPendingIntent(0, (int)PendingIntentFlags.UpdateCurrent);

                // Build the notification
                NotificationCompat.Builder builder = new NotificationCompat.Builder(this)
                    .SetAutoCancel(true) // dismiss the notification from the notification area when the user clicks on it
                    .SetContentIntent(resultPendingIntent) // start up this activity when the user clicks the intent.
                    .SetContentTitle(score) // Set the title
                    .SetNumber(1) // Display the count in the Content Info
                    .SetSmallIcon(Resource.Drawable.alert) // This is the icon to display
                    .SetContentText(score); // the message to display.

                // Finally publish the notification
                NotificationManager notificationManager = (NotificationManager)GetSystemService(Context.NotificationService);
                notificationManager.Notify(1, builder.Build());

                //
            
            catch 
            

            
        
    

【参考方案2】：

我从不费心尝试构建我们自己的推送技术，因为 PushSharp 运行良好。他有带有工作代码的 monodroid 和 monotouch 示例。我们一直在工作中使用它，除了一些已修复的旧错误之外，该库一直很可靠。

我查看了我的应用程序生成的清单，其中包含一些您没有的内容。如果你坚持构建自己的服务，至少看看他的代码，看看他是怎么做的。

Link to GitHub project