Firebase Android 尝试获取令牌时 FCM INVALID_SENDER

Question

我创建了一个 google-services.json 文件并添加到我的 android 项目中，但是当我尝试获取令牌时收到此异常：

{
Java.IO.IOException: java.util.concurrent.ExecutionException: java.io.IOException: INVALID_SENDER ---> Java.Util.Concurrent.ExecutionException: java.io.IOException: INVALID_SENDER ---> Java.IO.IOException: INVALID_SENDER
   --- End of inner exception stack trace ---
   --- End of inner exception stack trace ---
  at VTInRoomApp.Droid.XamarinForms.MainActivityXam.OnComplete (Android.Gms.Tasks.Task task) [0x00039] in T:\Work\VT\Dev\Mobile\Xamarin\VTInRoomApp\VTInRoomApp\VTInRoomApp.Android\XamarinForms\MainActivityXam.cs:157 
  --- End of managed Java.IO.IOException stack trace ---
java.io.IOException: java.util.concurrent.ExecutionException: java.io.IOException: INVALID_SENDER
    at com.google.firebase.messaging.FirebaseMessaging.blockingGetToken(com.google.firebase:firebase-messaging@@22.0.0:14)
    at com.google.firebase.messaging.FirebaseMessaging.lambda$getToken$2$FirebaseMessaging(com.google.firebase:firebase-messaging@@22.0.0:1)
    at com.google.firebase.messaging.FirebaseMessaging$$Lambda$3.run(com.google.firebase:firebase-messaging@@22.0.0)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:428)
    at java.util.concurrent.FutureTask.run(FutureTask.java:237)
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:272)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1133)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:607)
    at com.google.android.gms.common.util.concurrent.zza.run(com.google.android.gms:play-services-basement@@17.6.0:2)
    at java.lang.Thread.run(Thread.java:761)
Caused by: java.util.concurrent.ExecutionException: java.io.IOException: INVALID_SENDER
    at com.google.android.gms.tasks.Tasks.zza(com.google.android.gms:play-services-tasks@@17.2.1:5)
    at com.google.android.gms.tasks.Tasks.await(com.google.android.gms:play-services-tasks@@17.2.1:8)
    at com.google.firebase.messaging.FirebaseMessaging.blockingGetToken(com.google.firebase:firebase-messaging@@22.0.0:10)
    ... 9 more
Caused by: java.io.IOException: INVALID_SENDER
    at com.google.firebase.messaging.GmsRpc.handleResponse(com.google.firebase:firebase-messaging@@22.0.0:7)
    at com.google.firebase.messaging.GmsRpc.lambda$extractResponseWhenComplete$0$GmsRpc(com.google.firebase:firebase-messaging@@22.0.0:1)
    at com.google.firebase.messaging.GmsRpc$$Lambda$1.then(com.google.firebase:firebase-messaging@@22.0.0)
    at com.google.android.gms.tasks.zzc.run(com.google.android.gms:play-services-tasks@@17.2.1:3)
    at com.google.firebase.messaging.GmsRpc$$Lambda$0.execute(com.google.firebase:firebase-messaging@@22.0.0)
    at com.google.android.gms.tasks.zzd.zza(com.google.android.gms:play-services-tasks@@17.2.1:1)
    at com.google.android.gms.tasks.zzr.zzb(com.google.android.gms:play-services-tasks@@17.2.1:5)
    at com.google.android.gms.tasks.zzw.zza(com.google.android.gms:play-services-tasks@@17.2.1:3)
    at com.google.android.gms.tasks.zzc.run(com.google.android.gms:play-services-tasks@@17.2.1:8)
    at com.google.android.gms.cloudmessaging.zzz.execute(com.google.android.gms:play-services-cloud-messaging@@17.0.0)
    at com.google.android.gms.tasks.zzd.zza(com.google.android.gms:play-services-tasks@@17.2.1:1)
    at com.google.android.gms.tasks.zzr.zzb(com.google.android.gms:play-services-tasks@@17.2.1:5)
    at com.google.android.gms.tasks.zzw.zza(com.google.android.gms:play-services-tasks@@17.2.1:3)
    at com.google.android.gms.tasks.TaskCompletionSource.setResult(com.google.android.gms:play-services-tasks@@17.2.1:1)
    at com.google.android.gms.cloudmessaging.zzp.zzd(com.google.android.gms:play-services-cloud-messaging@@17.0.0:3)
    at com.google.android.gms.cloudmessaging.zzr.zza(com.google.android.gms:play-services-cloud-messaging@@17.0.0:2)
    at com.google.android.gms.cloudmessaging.zzf.handleMessage(com.google.android.gms:play-services-cloud-messaging@@17.0.0:14)
    at android.os.Handler.dispatchMessage(Handler.java:98)
    at android.os.Looper.loop(Looper.java:154)
    at android.app.ActivityThread.main(ActivityThread.java:6157)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:912)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:802)
}

我在创建 google-servies.json 时搞砸了吗，还是我的代码中有什么东西？

非常感谢你

Answer 1

通常，此错误是由 json 文件引起的。 检查以下信息以确认。

1. 检查您是否已将文件复制到正确的项目文件夹中，并将构建操作设置为GoogleServicesJson 。
2. 检查文件是否正确并与 FCM 中最新下载的 google-services.json 文件匹配。
3. 检查您的项目中是否存在 google-services.json 的重复文件。
4. 请注意，当将google-services.json添加到项目（并设置了GoogleServicesJson构建操作）时，构建过程会提取client ID和API密钥，然后将这些凭据添加到驻留在obj/Debug/android/AndroidManifest.xml的合并/生成的AndroidManifest.xml obj/Debug/android/AndroidManifest.xml 。 如果您可以确认一切正确，删除 bin 和 obj 以清理并重建并重新打开项目可能会有所帮助。
5. 如果您仍然遇到此问题，请创建一个新项目以按照 MS 文档中的步骤进行操作。 https://learn.microsoft.com/en-us/xamarin.android/data-cloud/google-messaging/remote-notifications-with-fcm?tabs=windows

Answer 2

尝试这个

FirebaseMessaging.getInstance().getToken()
.addOnCompleteListener(new OnCompleteListener<String>() {
    @Override
    public void onComplete(@NonNull Task<String> task) {
      if (!task.isSuccessful()) {
        Log.w(TAG, "Fetching FCM registration token failed", task.getException());
        return;
      }

      // Get new FCM registration token
      String token = task.getResult();

      // Log and toast
      String msg = getString(R.string.msg_token_fmt, token);
      Log.d(TAG, msg);
      Toast.makeText(MainActivity.this, msg, Toast.LENGTH_SHORT).show();
    }
});