Firebase 未检测到我的颤振应用程序，并且无法发送推送通知

Question

Firebase 未检测到我的 Android 应用（在设置部分，最后一步是“运行您的应用以验证安装”）。我也无法向应用程序发送通知。我已经导入了所有重要的包（核心和消息），并根据这篇Medium 文章完成了所有工作。我还检查了许多 stackoverflow 问题，例如 this。但是，我仍然无法在我的设备（genymotion 模拟器）中接收推送通知。 有一个错误说：

E/FirebaseInstanceId( 7264): Topic sync or token retrieval failed on hard failure 
exceptions: INVALID_SENDER. Won't retry the operation.
W/FirebaseMessagingPlugin( 7264): getToken, error fetching instanceID:                                             
W/FirebaseMessagingPlugin( 7264): java.io.IOException: INVALID_SENDER                                              
W/FirebaseMessagingPlugin( 7264):       at 
com.google.firebase.iid.zzl.zza(com.google.firebase:firebase-iid@@20.0.2:71)
W/FirebaseMessagingPlugin( 7264):       at 
com.google.firebase.iid.zzl.zza(com.google.firebase:firebase-iid@@20.0.2:84)
W/FirebaseMessagingPlugin( 7264):       at 
com.google.firebase.iid.zzp.then(com.google.firebase:firebase-iid@@20.0.2:4)
W/FirebaseMessagingPlugin( 7264):       at com.google.android.gms.tasks.zzd.run(Unknown 
Source)                    
W/FirebaseMessagingPlugin( 7264):       at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
W/FirebaseMessagingPlugin( 7264):       at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
W/FirebaseMessagingPlugin( 7264):       at java.lang.Thread.run(Thread.java:818)                                   
W/FirebaseMessagingPlugin( 7264): getToken, error fetching instanceID:                                             
W/FirebaseMessagingPlugin( 7264): java.io.IOException: INVALID_SENDER                                              
W/FirebaseMessagingPlugin( 7264):       at 
com.google.firebase.iid.zzl.zza(com.google.firebase:firebase-iid@@20.0.2:71)
W/FirebaseMessagingPlugin( 7264):       at 
com.google.firebase.iid.zzl.zza(com.google.firebase:firebase-iid@@20.0.2:84)
W/FirebaseMessagingPlugin( 7264):       at 
com.google.firebase.iid.zzp.then(com.google.firebase:firebase-iid@@20.0.2:4)
W/FirebaseMessagingPlugin( 7264):       at com.google.android.gms.tasks.zzd.run(Unknown 
Source)                    
W/FirebaseMessagingPlugin( 7264):       at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
W/FirebaseMessagingPlugin( 7264):       at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
W/FirebaseMessagingPlugin( 7264):       at java.lang.Thread.run(Thread.java:818) 

请帮我解决这个问题。

Answer 1

您需要将 google-services.json 添加到项目中。