Сбой приложения при переключении в ландшафтный режим (Android Studio)

Question

Я новичок в разработке android, и я пытаюсь использовать фрагменты, однако приложение вылетает при попытке переключиться в ландшафтный режим. Я пытался использовать android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|uiMode|screenSize|smallestScreenSize" android:windowSoftInputMode="adjustPan" в своем манифесте приложения, но кажется, что приложение просто игнорирует его и продолжает оставаться в портретном режиме, несмотря на то, что находится в альбомной ориентации, пока приложение не перезапустится.

Вот мой код main XML

    <?xml version="1.0" encoding="utf-8"?>
    <androidx.constraintlayout.widget.ConstraintLayout 
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <fragment
        android:id="@+id/fragment"
        android:name="com.example.TopFrag"
        android:layout_width="421dp"
        android:layout_height="163dp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.49"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

      <fragment
        android:id="@+id/fragment2"
        android:name="com.example.BottomFrag"
        android:layout_width="413dp"
        android:layout_height="568dp"
        android:layout_marginTop="1dp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.708"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/fragment" />
    </androidx.constraintlayout.widget.ConstraintLayout>

    //Main activity `

       package com.example;
       import androidx.appcompat.app.AppCompatActivity;
       import android.app.Fragment;
       import android.app.FragmentTransaction;
       import android.app.FragmentManager;

       import android.os.Bundle;

MainActivity

    public class MainActivity extends AppCompatActivity implements TopFrag.TopHalfFragmentListener{




    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);





        FragmentManager fm = getFragmentManager();

        FragmentTransaction ft = fm.beginTransaction();

        Fragment myFragment = new TopFrag();

        ft.replace(R.id.fragment,myFragment);

        ft.commit();
      }

    @Override
      public void handleClicks(int holder) {

       }
     }

Фрагмент XML

    <?xml version="1.0" encoding="utf-8"?>
    <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/topFrag"
    tools:context=".TopFrag" >

    <androidx.constraintlayout.widget.ConstraintLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <Button
            android:id="@+id/btnUp"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="88dp"
            android:layout_marginEnd="71dp"
            android:text="@string/minus"
            app:layout_constraintEnd_toStartOf="@+id/btnDown"
            app:layout_constraintHorizontal_bias="0.855"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent" />

        <Button
            android:id="@+id/btnDown"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="88dp"
            android:layout_marginEnd="88dp"
            android:text="@string/plus"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintTop_toTopOf="parent" />
    </androidx.constraintlayout.widget.ConstraintLayout>
 </FrameLayout>

Фрагмент. java

     package com.example;


     import android.os.Bundle;

     import android.app.Fragment;

     import android.view.LayoutInflater;
     import android.view.View;
     import android.view.ViewGroup;
     import android.widget.Button;


       /**
       * A simple {@link Fragment} subclass.
      */
         public class TopFrag extends Fragment implements View.OnClickListener{


      public TopFrag() {
         // Required empty public constructor
      }
     Button up;
     Button down;
     int count =0;

     @Override
     public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {

        View mv = inflater.inflate(R.layout.fragment_top, container, false);

        up = mv.findViewById(R.id.btnDown);
        down = mv.findViewById(R.id.btnUp);

        up.setOnClickListener(this);
        down.setOnClickListener(this);

        return mv;
    }

     @Override
     public void onClick(View v) {
         if (up.isPressed()){
            count= count+1;
         }else if(count>0){
            count= count -1;
         }

         TopHalfFragmentListener clickListner = (TopHalfFragmentListener) getActivity();
         clickListner.handleClicks(count);
       }

     public interface TopHalfFragmentListener{
        void handleClicks(int count);
      }
     }

Фрагмент 2 XML

    <?xml version="1.0" encoding="utf-8"?>
    <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/bottomFragColor"
    tools:context=".BottomFrag" >

    <androidx.constraintlayout.widget.ConstraintLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <TextView
            android:id="@+id/txtOutput"
            android:layout_width="31dp"
            android:layout_height="13dp"
            android:layout_marginTop="200dp"
            android:textSize="18sp"
            android:textStyle="bold"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent" />
    </androidx.constraintlayout.widget.ConstraintLayout>
    </FrameLayout>

Фрагмент 2. JAVA

     import android.os.Bundle;

     import androidx.fragment.app.Fragment;

     import android.view.LayoutInflater;
     import android.view.View;
     import android.view.ViewGroup;


       /**
        * A simple {@link Fragment} subclass.
       */
       public class BottomFrag extends Fragment {


      public BottomFrag() {
        // Required empty public constructor
      }


    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {

        View mv = inflater.inflate(R.layout.fragment_bottom, container, false);

        return mv;
       }

     }

Ошибка, которую я получил ..

    E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.example, PID: 1096
    java.lang.RuntimeException: Unable to start activity 
    ComponentInfo{com.example/com.example.MainActivity}: android.view.InflateException: Binary XML file 
    line #9: Binary XML file line #9: Error inflating class fragment
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2817)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2892)
        at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:4754)
        at android.app.ActivityThread.-wrap18(Unknown Source:0)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1599)
        at android.os.Handler.dispatchMessage(Handler.java:105)
        at android.os.Looper.loop(Looper.java:164)
        at android.app.ActivityThread.main(ActivityThread.java:6541)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)
     Caused by: android.view.InflateException: Binary XML file line #9: Binary XML file line #9: Error 
     inflating class fragment
     Caused by: android.view.InflateException: Binary XML file line #9: Error inflating class fragment
     Caused by: java.lang.IllegalStateException: Fragment com.example.TopFrag did not create a view.
        at android.app.FragmentManagerImpl.onCreateView(FragmentManager.java:3643)
        at android.app.FragmentController.onCreateView(FragmentController.java:98)
        at android.app.Activity.onCreateView(Activity.java:6187)
        at androidx.fragment.app.FragmentActivity.onCreateView(FragmentActivity.java:389)
        at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:780)
        at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:730)
        at android.view.LayoutInflater.rInflate(LayoutInflater.java:863)
        at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:824)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:515)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:423)
        at android.view.LayoutInflater.inflate(LayoutInflater.java:374)
        at androidx.appcompat.app.AppCompatDelegateImpl.setContentView(AppCompatDelegateImpl.java:469)
        at androidx.appcompat.app.AppCompatActivity.setContentView(AppCompatActivity.java:140)
        at com.example.MainActivity.onCreate(MainActivity.java:22)
        at android.app.Activity.performCreate(Activity.java:6975)
        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1213)
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2770)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2892)
        at android.app.ActivityThread.handleRelaunchActivity(ActivityThread.java:4754)
        at android.app.ActivityThread.-wrap18(Unknown Source:0)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1599)
        at android.os.Handler.dispatchMessage(Handler.java:105)
        at android.os.Looper.loop(Looper.java:164)
        at android.app.ActivityThread.main(ActivityThread.java:6541)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)

Любая помощь очень ценится.