Updated Sample for Xamarin.Firebase.Config

[donatellijl]

Xamarin.Android Version (eg: 6.0):

11.2.2.1

Operating System & Version (eg: Mac OSX 10.11):

Mac OSX 11.2.3

Google Play Services Version

• Xamarin.Firebase.Config 120.0.3

Describe your Issue

I am trying to upgrade Xamarin.Firebase.Config from 71.1610.4 to 120.0.3. After upgrading and removing all the deprecated calls and replacing with the new methods, Firebase Remote Config is no longer working. I have copied the code from the FirebaseConfigQuickstart sample project, but I get an error "Java.Lang.IllegalMonitorStateException: object not locked by thread before wait()" on any call that had .Wait() at the end.

If I remove the .Wait(), I get this error on calling FetchAsync(), "{Firebase.RemoteConfig.FirebaseRemoteConfigClientException: Firebase Installations failed to get installation auth token for fetch. ---> Firebase.Installations.FirebaseInstallationsException: Firebase Installations Service is unavailable. Please try again later…}"

I am not able to get the FirebaseConfigQuickstart project to work either. It builds, but crashes on open with the error "java.lang.RuntimeException: Unable to instantiate application androidx.multidex.MultiDexApplication: java.lang.ClassNotFoundException: Didn't find class "androidx.multidex.MultiDexApplication" on path: DexPathList[[zip file "/data/app/com.xamarin.firebase.configquickstart-MRg5oGkzFAa2yGuZxRptfQ==/base.apk"],nativeLibraryDirectories=[/data/app/com.xamarin.firebase.configquickstart-MRg5oGkzFAa2yGuZxRptfQ==/lib/x86, /data/app/com.xamarin.firebase.configquickstart-MRg5oGkzFAa2yGuZxRptfQ==/base.apk!/lib/x86, /system/lib, /system/product/lib]]". The sample project is also currently using 119.1.1.

Can you upgrade the sample project to use 120.0.3 and demonstrate a working example?

Relevant information

Add relevant project settings from *.csproj file:

Packages used:

    <PackageReference Include="Xamarin.AndroidX.AppCompat">
      <Version>1.2.0.7</Version>
    </PackageReference>
    <PackageReference Include="Xamarin.AndroidX.Browser">
      <Version>1.2.0.1</Version>
    </PackageReference>
    <PackageReference Include="Xamarin.AndroidX.Core">
      <Version>1.3.2.3</Version>
    </PackageReference>
    <PackageReference Include="Xamarin.AndroidX.Legacy.Support.V4">
      <Version>1.0.0.1</Version>
    </PackageReference>
    <PackageReference Include="Xamarin.AndroidX.Lifecycle.LiveData">
      <Version>2.2.0.1</Version>
    </PackageReference>
    <PackageReference Include="Xamarin.AndroidX.Migration">
      <Version>1.0.6.1</Version>
    </PackageReference>
    <PackageReference Include="Xamarin.Google.Android.Material">
      <Version>1.0.0.1</Version>
    </PackageReference>
    <PackageReference Include="Xamarin.Firebase.Analytics">
      <Version>118.0.2</Version>
    </PackageReference>
    <PackageReference Include="Xamarin.Firebase.Config">
      <Version>120.0.3</Version>
    </PackageReference>
    <PackageReference Include="Xamarin.Android.Support.Collections">
      <Version>28.0.0.3</Version>
    </PackageReference>
    <PackageReference Include="Xamarin.Firebase.Iid">
      <Version>121.0.1</Version>
    </PackageReference>
    <PackageReference Include="Xamarin.GooglePlayServices.Vision">
      <Version>71.1702.4</Version>
    </PackageReference>
    <PackageReference Include="Xamarin.Google.ZXing.Core">
      <Version>3.3.3</Version>
    </PackageReference>

Build settings (tools)

    <DebugSymbols>true</DebugSymbols>
    <DebugType>portable</DebugType>
    <Optimize>false</Optimize>
    <OutputPath>bin\Debug</OutputPath>
    <DefineConstants>DEBUG;</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
    <MandroidI18n />
    <AndroidDexTool>d8</AndroidDexTool>
    <AndroidPackageFormat>apk</AndroidPackageFormat>
    <AndroidUseAapt2>true</AndroidUseAapt2>
    <AndroidLinkMode>None</AndroidLinkMode>

Info from Google about removing the methods we are currently using on 71.1610.4:
Remote Config version 20.0.0

• Removed the protocol buffer dependency. Also, removed support for configs saved on device using the legacy protocol buffer format (the SDK stopped using this legacy format starting with Remote Config v16.3.0).
• Removed the deprecated synchronous method FirebaseRemoteConfig.activateFetched(). Use the asynchronous FirebaseRemoteConfig.activate() instead.
• Removed the deprecated synchronous methods FirebaseRemoteConfig.setDefaults(int) and FirebaseRemoteConfig.setDefaults(Map<String,Object>). Use the asynchronous FirebaseRemoteConfig.setDefaultsAsync(int) and FirebaseRemoteConfig.setDefaultsAsync(Map<String,Object>) instead.
• Removed the deprecated synchronous method FirebaseRemoteConfig.setConfigSettings(FirebaseRemoteConfigSettings). Use the asynchronous FirebaseRemoteConfig.setConfigSettingsAsync(FirebaseRemoteConfigSettings) instead.
• Removed the deprecated method FirebaseRemoteConfig.getByteArray(String). Use FirebaseRemoteConfig.getString(String) instead.
• Removed the deprecated methods FirebaseRemoteConfigSettings.isDeveloperModeEnabled() and FirebaseRemoteConfigSettings.Builder.setDeveloperModeEnabled(boolean). Use FirebaseRemoteConfigSettings#getMinimumFetchIntervalInSeconds() and FirebaseRemoteConfigSettings.Builder#setMinimumFetchIntervalInSeconds(long) instead.
  Source: https://firebase.google.com/support/release-notes/android#remote-config_v20-0-0

Minimal Repro Code Sample

public class RemoteConfigService : IRemoteConfigService
    {
        public RemoteConfigService()
        {
            FirebaseRemoteConfig.Instance.SetDefaultsAsync(Resource.Xml.remote_config_defaults).Wait();
#if DEBUG
            FirebaseRemoteConfigSettings configSettings = new FirebaseRemoteConfigSettings.Builder().Build();
            FirebaseRemoteConfig.Instance.SetConfigSettingsAsync(configSettings).Wait();
#endif
        }

        public async System.Threading.Tasks.Task FetchAndActivateAsync()
        {
            long cacheExpiration = 3600; // 1 hour in seconds.
            try
            {
                await FirebaseRemoteConfig.Instance.FetchAsync(cacheExpiration);
                FirebaseRemoteConfig.Instance.Activate().Wait();
            }
            catch (System.Exception e)
            {
                var error = "firebase connection error " + e.Message;
            }
        }

        public async Task<TInput> GetAsync<TInput>(string key)
        {
            var settings = FirebaseRemoteConfig.Instance.GetString(key);
            return await Task.FromResult(Newtonsoft.Json.JsonConvert.DeserializeObject<TInput>(settings));
        }
}

Steps to Reproduce (with link to sample solution if possible):

Upgrade Xamarin.Firebase.Config to 120.0.3.

[a-pier]

Any progress on this I also cannot get your sample project to build, receive error

System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> Java.Lang.IllegalMonitorStateException: object not locked by thread before wait() at Java.Interop.JniEnvironment+InstanceMethods.CallNonvirtualVoidMet…

Please advise.