错误:包com.google.firebase.messaging不存在

问题描述：

我正在尝试构建项目，但是当我这样做时，会出现以下错误:错误:com.google.firebase.messaging软件包不存在"，以及其他4种同类错误.

I'm trying to build my project, but when I do, I get this error: "error: package com.google.firebase.messaging does not exist", along with other 4 errors of the same kind.

    package md5f64326b4609986d97810cf2ced03c9ce;


public class MyFirebaseMessagingService
extends com.google.firebase.messaging.FirebaseMessagingService
implements
    mono.android.IGCUserPeer
{
/** @hide */
public static final String __md_methods;
static {
    __md_methods = 
        "n_onMessageReceived(Lcom/google/firebase/messaging/RemoteMessage;)V:GetOnMessageReceived_Lcom_google_firebase_messaging_RemoteMessage_Handler\n" +
        "";
    mono.android.Runtime.register ("FCMClient.MyFirebaseMessagingService, LimBands.Droid, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null", MyFirebaseMessagingService.class, __md_methods);
}


public MyFirebaseMessagingService ()
{
    super ();
    if (getClass () == MyFirebaseMessagingService.class)
        mono.android.TypeManager.Activate ("FCMClient.MyFirebaseMessagingService, LimBands.Droid, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null", "", this, new java.lang.Object[] {  });
}


public void onMessageReceived (com.google.firebase.messaging.RemoteMessage p0)
{
    n_onMessageReceived (p0);
}

private native void n_onMessageReceived (com.google.firebase.messaging.RemoteMessage p0);

private java.util.ArrayList refList;
public void monodroidAddReference (java.lang.Object obj)
{
    if (refList == null)
        refList = new java.util.ArrayList ();
    refList.add (obj);
}

public void monodroidClearReferences ()
{
    if (refList != null)
        refList.clear ();
}
}

这是我的整个文件，位于obj文件夹中.我已经尝试删除bin/obj文件夹，手动删除并重新安装所有nuget软件包，更改nuget软件包版本(降级和升级)，但是似乎没有任何作用.

This is my whole file, it is on the obj folder. I already tried deleting the bin/obj folders, manually deleting and reinstalling all nuget packages, changing nuget package versions (downgrading and upgrading), but nothing seems to work.

我什至将某些文件与另一种工作方式相同的解决方案进行了比较，但没有发现差异.

I even compared some files with another solution that works the same way, and I found no differences.

答

UPDATE

似乎更新为以下所有软件包的最新版本，并将Xamarin.Build.Download更新为0.4.11，也可以解决此问题.

UPDATE

It seems updating to the latest version of all the below packages and updating Xamarin.Build.Download to 0.4.11 also solves the issue.

您当前面临的问题是Xamarin尚未提供适当解决方案的常见问题，因此上次遇到此问题时我已解决了此问题.

The problem you are facing right now is a common problem to which a proper solution has not been provided by Xamarin so there is this workaround I made up the last time I faced this problem.

如果您同时使用Google地图和Firebase Cloud Messaging，则需要执行以下步骤:

If you are using both Google maps and Firebase Cloud Messaging the following are the steps you need to take:

在您的引用中检查以下DLL的版本，并升级或降级您的引用以匹配这些版本:

Xamarin.Firebase.Common-42.1021.1

Xamarin.Firebase.Common- 42.1021.1

Xamarin.Firebase.lid-42.1021.1

Xamarin.Firebase.lid- 42.1021.1

Xamarin.Firebase.Messaging-42.1021.1

Xamarin.Firebase.Messaging- 42.1021.1

Xamarin.GooglePlayServices.Base-42.1021.1

Xamarin.GooglePlayServices.Base- 42.1021.1

Xamarin.GooglePlayServices.Basement-42.1021.1

Xamarin.GooglePlayServices.Basement- 42.1021.1

Xamarin.GooglePlayServices.GCM-42.1021.1

Xamarin.GooglePlayServices.GCM- 42.1021.1

Xamarin.GooglePlayServices.lid-42.1021.1

Xamarin.GooglePlayServices.lid- 42.1021.1

Xamarin.GooglePlayServices.Location-42.1021.1

Xamarin.GooglePlayServices.Location- 42.1021.1

Xamarin.GooglePlayServices.Maps-42.1021.1

Xamarin.GooglePlayServices.Maps- 42.1021.1

Xamarin.GooglePlayServices.Tasks-42.1021.1

Xamarin.GooglePlayServices.Tasks- 42.1021.1

检查xamarin构建DLL的当前版本是否在0.4.2以上. 降级到0.4.2

Check the current version of your xamarin build DLL in case it is above 0.4.2 downgrade it to 0.4.2

Xamarin.Build.Download-0.4.2

清理并生成解决方案，以防问题仍然存在，请删除bin和obj文件夹，然后清理生成项目.

如果问题仍然存在，请发表评论，以便我跟进.

In case the problem still persists kindly comment so I can follow up.

错误:包com.google.firebase.messaging不存在

UPDATE

UPDATE

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