收到Firebase云消息传递后无法打开我的Android后台应用程序（Xamarin）

Question

我有一个Xamarin Android应用程序。收到推送通知后，如果应用程序处于活动状态且处于前台状态，则可以打开该应用程序。但是，如果应用程序在后台或被杀，应用程序将无法打开。

已经按照下面的页面中所述的Xamarin指导原则进行了操作，但是提供的代码也不起作用。 https://developer.xamarin.com/guides/android/application_fundamentals/notifications/remote-notifications-with-fcm/

我想在接收到FCM推送通知时采取措施（阅读打开）。如果应用程序已经打开，可以成功完成。我错过了什么吗？具体内容如下

AndroidManifest.xml中

<receiver android:name="com.google.firebase.iid.FirebaseInstanceIdInternalReceiver" android:exported="false" /> 
    <receiver android:name="com.google.firebase.iid.FirebaseInstanceIdReceiver" 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="${applicationId}" /> 
     </intent-filter> 
    </receiver> 

FirebaseInstanceIdService实施

[Service] 
[IntentFilter(new[] { "com.google.firebase.INSTANCE_ID_EVENT" })] 
public class MyFirebaseIIDService : FirebaseInstanceIdService 
{ 
    const string TAG = "MyFirebaseIIDService"; 
    public override void OnTokenRefresh() 
    { 
     var refreshedToken = FirebaseInstanceId.Instance.Token; 
     Log.Debug(TAG, "Refreshed token: " + refreshedToken); 
     SendRegistrationToAppServer(refreshedToken); 
    } 


    void SendRegistrationToAppServer(string token) 
    { 
     // Add custom implementation here as needed. 

     var android_id = Android.OS.Build.Serial; 
     App.AccessCode(token, android_id); 
    } 

} 

FirebaseMessagingService实施

[Service] 
[IntentFilter(new [] { "com.google.firebase.MESSAGING_EVENT" })] 
public class MyFCMListenerService: FirebaseMessagingService { 
Intent intent; 

public override void OnMessageReceived(RemoteMessage message) { 
    Thread thread = new Thread(() => { 
    Log.Debug("MyGcmListenerService", "Message: thread"); 
    PushHandler pushHandler = PushHandler.GetPushHander(); 
    pushHandler.OnReceiveNewNotification(msg, pushType.ToString()); 

    }); 
    thread.Start(); 
} 
} 

Package.config

<?xml version="1.0" encoding="utf-8"?> 
<packages> 
    <package id="AndHUD" version="1.2.0" targetFramework="MonoAndroid60" /> 
    <package id="Plugin.CurrentActivity" version="1.0.1" targetFramework="monoandroid71" /> 
    <package id="SQLite.Net.Core-PCL" version="3.1.1" targetFramework="MonoAndroid60" /> 
    <package id="SQLite.Net-PCL" version="3.1.1" targetFramework="MonoAndroid60" /> 
    <package id="Xam.Plugin.Connectivity" version="3.0.2" targetFramework="monoandroid71" /> 
    <package id="Xam.Plugin.DeviceInfo" version="3.0.1" targetFramework="monoandroid71" /> 
    <package id="Xamarin.Android.Support.Animated.Vector.Drawable" version="25.4.0.2" targetFramework="monoandroid71" /> 
    <package id="Xamarin.Android.Support.Annotations" version="25.4.0.2" targetFramework="monoandroid71" /> 
    <package id="Xamarin.Android.Support.Compat" version="25.4.0.2" targetFramework="monoandroid71" /> 
    <package id="Xamarin.Android.Support.Core.UI" version="25.4.0.2" targetFramework="monoandroid71" /> 
    <package id="Xamarin.Android.Support.Core.Utils" version="25.4.0.2" targetFramework="monoandroid71" /> 
    <package id="Xamarin.Android.Support.Design" version="25.4.0.2" targetFramework="monoandroid71" /> 
    <package id="Xamarin.Android.Support.Fragment" version="25.4.0.2" targetFramework="monoandroid71" /> 
    <package id="Xamarin.Android.Support.Media.Compat" version="25.4.0.2" targetFramework="monoandroid71" /> 
    <package id="Xamarin.Android.Support.Transition" version="25.4.0.2" targetFramework="monoandroid71" /> 
    <package id="Xamarin.Android.Support.v4" version="25.4.0.2" targetFramework="monoandroid71" /> 
    <package id="Xamarin.Android.Support.v7.AppCompat" version="25.4.0.2" targetFramework="monoandroid71" /> 
    <package id="Xamarin.Android.Support.v7.CardView" version="25.4.0.2" targetFramework="monoandroid71" /> 
    <package id="Xamarin.Android.Support.v7.MediaRouter" version="25.4.0.2" targetFramework="monoandroid71" /> 
    <package id="Xamarin.Android.Support.v7.Palette" version="25.4.0.2" targetFramework="monoandroid71" /> 
    <package id="Xamarin.Android.Support.v7.RecyclerView" version="25.4.0.2" targetFramework="monoandroid71" /> 
    <package id="Xamarin.Android.Support.Vector.Drawable" version="25.4.0.2" targetFramework="monoandroid71" /> 
    <package id="Xamarin.Build.Download" version="0.4.7" targetFramework="monoandroid71" /> 
    <package id="Xamarin.Firebase.Common" version="42.1021.1" targetFramework="monoandroid71" /> 
    <package id="Xamarin.Firebase.Iid" version="42.1021.1" targetFramework="monoandroid71" /> 
    <package id="Xamarin.Firebase.Messaging" version="42.1021.1" targetFramework="monoandroid71" /> 
    <package id="Xamarin.Forms" version="2.3.4.270" targetFramework="monoandroid71" /> 
    <package id="Xamarin.GooglePlayServices.Base" version="42.1021.1" targetFramework="monoandroid71" /> 
    <package id="Xamarin.GooglePlayServices.Basement" version="42.1021.1" targetFramework="monoandroid71" /> 
    <package id="Xamarin.GooglePlayServices.Tasks" version="42.1021.1" targetFramework="monoandroid71" /> 
</packages> 

此外，如果我使用规定的配置FirebaseApp.InitializeApp(this); 然后无法打开应用程序，即使在前台。为了解决这个问题，已经使用 google-services.json

我做这行的配置

var options = new FirebaseOptions.Builder() 
      .SetApplicationId("1:******:*****") 
      .SetApiKey("*******-a6-cEUkjxB6EqiO9zmkNcmu") 
      //.SetDatabaseUrl("Firebase-Database-Url") 
      .SetGcmSenderId("******") 
      .Build(); 

      var firebaseApp = FirebaseApp.InitializeApp(this, options); 
      // Generate token in background thread 
      Task.Run(() => { 
       var instanceID = FirebaseInstanceId.Instance; 
       instanceID.DeleteInstanceId(); 
       var iid1 = instanceID.Token; 
       var iid2 = instanceID.GetToken("*****", Firebase.Messaging.FirebaseMessaging.InstanceIdScope); 
      }); 

Answer 1

天浪费时间后，我找出一个替代在后台接受推送和处理或修改

public override void HandleIntent(Intent p0) 

这个函数在每次前景和背景都被调用，但是在杀死这个函数后不会工作。