Android.Views.InflateException Binary XML file line #1 in layout/toolbar: Error inflating class androidx.appcompat.widget.Toolbar

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In a xamarin.forms android project, MainActivity.cs contains:
  [Activity (Label = "Almicantarat", Theme = "@style/MainTheme",  
  Icon = "@drawable/almicantarat_launcher",   
  MainLauncher = true,  
  ConfigurationChanges = ConfigChanges.ScreenSize | ConfigChanges.Orientation)]  
  public class MainActivity : global::Xamarin.Forms.Platform.Android.FormsAppCompatActivity  
I need to remove:    
 Theme = "@STYLE  /MainTheme",    
in order to use a custom theme and a toolbar.    
But then I met the following exception:    
Android.Views.InflateException    

Message=Binary XML file line #1 in almicantarat.almicantarat:layout/toolbar: Binary XML file line #1 in almicantarat.almicantarat:layout/toolbar: Error inflating class androidx.appcompat.widget.Toolbar    
This is styles.xml:    
<?xml version="1.0" encoding="utf-8" ?>  
<resources>  
  <style name="AlmicantaratTheme" parent="@android:Theme.Material">  
      <item name="android:windowNoTitle">true</item>  
      <item name="android:windowActionBar">false</item>  
      <item name="android:colorPrimary">#15014E</item>  
      <item name="android:colorPrimaryDark">#15014E</item>  
      <item name="android:navigationBarColor">#15014E</item>  
      <item name="android:statusBarColor">#15014E</item>  
      <item name="android:colorAccent">#FF4081</item>  
      <item name="android:windowActionModeOverlay">true</item>  
  </style>  
</resources>  
This is Toolbar.axml:    
<androidx.appcompat.widget.Toolbar  
    xmlns:android="http://schemas.android.com/apk/res/android"  
    xmlns:app="http://schemas.android.com/apk/res-auto"  
    android:id="@+id/toolbar"  
    android:layout_width="match_parent"  
    android:layout_height="?attr/actionBarSize"  
    android:minHeight="?attr/actionBarSize"  
    android:background="?attr/colorPrimary"  
    android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"  
    app:popupTheme="@style/ThemeOverlay.AppCompat.Light"  
    app:layout_scrollFlags="scroll|enterAlways" />  
How can I solve that?    
hint: this is an long time running project started in 2014. It migrated successfully to AndroidX.    

It targets SDK 29 and requires minimum SDK 21.    
using VS2019    

Xamarin.Forms v5.0.0.2125    
Welcome to our Microsoft Q&A platform!    
Error inflating class androidx.appcompat.widget.Toolbar    
I tested the code and reproduced the issue on my side. This is because @android:Theme.Material theme is not applicable in AndroidX. Please using Theme.AppCompat.* instead. Such as:    
   <style name="AlmicantaratTheme" parent="Theme.AppCompat.NoActionBar">  
     <item name="android:windowNoTitle">true</item>  
     <item name="android:windowActionBar">false</item>  
     <item name="android:colorPrimary">#15014E</item>  
     <item name="android:colorPrimaryDark">#15014E</item>  
     <item name="android:navigationBarColor">#15014E</item>  
     <item name="android:statusBarColor">#15014E</item>  
     <item name="android:colorAccent">#FF4081</item>  
     <item name="android:windowActionModeOverlay">true</item>  
   </style>  
Best Regards,    
Jarvan Zhang    
If the response is helpful, please click "Accept Answer" and upvote it.    
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.    
						Hello @JarvanZhang       

Then I get the following build error:    
resource android:style/Theme.AppCompat.NoActionBar not found.    
What nuget package should I install?    

I have already installed the following packages:    
sqlite-net-pcl                      {1.8.116}      Almicantarat.Droid                                                           
SQLitePCLRaw.bundle_green           {2.0.6}        Almicantarat.Droid                                                           
SQLitePCLRaw.lib.e_sqlite3          {2.0.6}        Almicantarat.Droid                                                           
SQLitePCLRaw.provider.e_sqlite3.... {1.1.14}       Almicantarat.Droid                                                           
System.Memory                       {4.5.4}        Almicantarat.Droid                                                           
System.Numerics.Vectors             {4.5.0}        Almicantarat.Droid                                                           
System.Runtime.CompilerServices.... {5.0.0}        Almicantarat.Droid                                                           
UrhoSharp.Forms                     {1.9.67}       Almicantarat.Droid                                                           
Xamarin.AndroidX.Legacy.Support.... {1.0.0.8}      Almicantarat.Droid                                                           
Xamarin.AndroidX.Browser            {1.3.0.6}      Almicantarat.Droid                                                           
Xamarin.Google.Android.Material     {1.4.0.2}      Almicantarat.Droid                                                           
Xamarin.AndroidX.MediaRouter        {1.2.5}        Almicantarat.Droid                                                           
Xamarin.AndroidX.AppCompat          {1.3.1.1}      Almicantarat.Droid                                                           
Xamarin.AndroidX.AppCompat.AppCo... {1.3.1.1}      Almicantarat.Droid                                                           
Xamarin.AndroidX.AsyncLayoutInfl... {1.0.0.8}      Almicantarat.Droid                                                           
Xamarin.AndroidX.CardView           {1.0.0.9}      Almicantarat.Droid                                                           
Xamarin.AndroidX.CursorAdapter      {1.0.0.8}      Almicantarat.Droid                                                           
Xamarin.AndroidX.Legacy.Support.V4  {1.0.0.8}      Almicantarat.Droid                                                           
Xamarin.AndroidX.Lifecycle.LiveData {2.3.1.1}      Almicantarat.Droid                                                           
Xamarin.AndroidX.Media              {1.4.2}        Almicantarat.Droid                                                           
Xamarin.AndroidX.MultiDex           {2.0.1.8}      Almicantarat.Droid                                                           
Xamarin.AndroidX.Palette            {1.0.0.8}      Almicantarat.Droid                                                           
Xamarin.AndroidX.RecyclerView       {1.2.1.1}      Almicantarat.Droid                                                           
Xamarin.AndroidX.SwipeRefreshLayout {1.1.0.3}      Almicantarat.Droid                                                           
Xamarin.AndroidX.Transition         {1.4.1.1}      Almicantarat.Droid                                                           
Xamarin.Essentials                  {1.7.0}        Almicantarat.Droid                                                           
Xamarin.Forms                       {5.0.0.2125}   Almicantarat.Droid                                                           
Xamarin.Forms.Maps                  {5.0.0.2125}   Almicantarat.Droid                                                           
Xamarin.GooglePlayServices.Base     {117.6.0}      Almicantarat.Droid                                                           
Xamarin.GooglePlayServices.Maps     {117.0.1}      Almicantarat.Droid                                                           
Xamarin.AndroidX.Migration          {1.0.8}        Almicantarat.Droid  
The previous Xamarin.Android.Support.* packages had been uninstalled by the AndroidX migration tool.    
regards,    
												Done!    

I got the following build error:    

resource android:style/Theme.AppCompat.NoActionBar not found.    
because I wrote:    

    <style name="AlmicantaratTheme" parent="@Krak ruiz  :Theme.AppCompat.NoActionBar">  
instead of:    

    <style name="AlmicantaratTheme" parent="Theme.AppCompat.NoActionBar">  
Now it compiles!    
Thanks    
						sqlite-net-pcl                      {1.8.116}      Almicantarat.Droid                                                           
SQLitePCLRaw.bundle_green           {2.0.6}        Almicantarat.Droid                                                           
SQLitePCLRaw.lib.e_sqlite3          {2.0.6}        Almicantarat.Droid                                                           
SQLitePCLRaw.provider.e_sqlite3.... {1.1.14}       Almicantarat.Droid                                                           
System.Memory                       {4.5.4}        Almicantarat.Droid                                                           
System.Numerics.Vectors             {4.5.0}        Almicantarat.Droid                                                           
System.Runtime.CompilerServices.... {5.0.0}        Almicantarat.Droid                                                           
UrhoSharp.Forms                     {1.9.67}       Almicantarat.Droid                                                           
Xamarin.AndroidX.Legacy.Support.... {1.0.0.8}      Almicantarat.Droid                                                           
Xamarin.AndroidX.Browser            {1.3.0.6}      Almicantarat.Droid                                                           
Xamarin.Google.Android.Material     {1.4.0.2}      Almicantarat.Droid                                                           
Xamarin.AndroidX.MediaRouter        {1.2.5}        Almicantarat.Droid                                                           
Xamarin.AndroidX.AppCompat          {1.3.1.1}      Almicantarat.Droid                                                           
Xamarin.AndroidX.AppCompat.AppCo... {1.3.1.1}      Almicantarat.Droid                                                           
Xamarin.AndroidX.AsyncLayoutInfl... {1.0.0.8}      Almicantarat.Droid                                                           
Xamarin.AndroidX.CardView           {1.0.0.9}      Almicantarat.Droid                                                           
Xamarin.AndroidX.CursorAdapter      {1.0.0.8}      Almicantarat.Droid                                                           
Xamarin.AndroidX.Legacy.Support.V4  {1.0.0.8}      Almicantarat.Droid                                                           
Xamarin.AndroidX.Lifecycle.LiveData {2.3.1.1}      Almicantarat.Droid                                                           
Xamarin.AndroidX.Media              {1.4.2}        Almicantarat.Droid                                                           
Xamarin.AndroidX.MultiDex           {2.0.1.8}      Almicantarat.Droid                                                           
Xamarin.AndroidX.Palette            {1.0.0.8}      Almicantarat.Droid                                                           
Xamarin.AndroidX.RecyclerView       {1.2.1.1}      Almicantarat.Droid                                                           
Xamarin.AndroidX.SwipeRefreshLayout {1.1.0.3}      Almicantarat.Droid                                                           
Xamarin.AndroidX.Transition         {1.4.1.1}      Almicantarat.Droid                                                           
Xamarin.Essentials                  {1.7.0}        Almicantarat.Droid                                                           
Xamarin.Forms                       {5.0.0.2125}   Almicantarat.Droid                                                           
Xamarin.Forms.Maps                  {5.0.0.2125}   Almicantarat.Droid                                                           
Xamarin.GooglePlayServices.Base     {117.6.0}      Almicantarat.Droid                                                           
Xamarin.GooglePlayServices.Maps     {117.0.1}      Almicantarat.Droid                                                           
Xamarin.AndroidX.Migration          {1.0.8}        Almicantarat.Droid