Settings Activity Preferences.xml

AndroidManifest.xml

<activity
    android:name=".SettingsActivity"
    android:parentActivityName=".MainActivity2" />

SettingsFragment.java

package com.zakasoft.newspaperbd;

import android.os.Bundle;

import androidx.preference.PreferenceFragmentCompat;

public class SettingsFragment extends PreferenceFragmentCompat {
    @Override
    public void onCreatePreferences(Bundle savedInstanceState, String s) {
        addPreferencesFromResource(R.xml.preferences);
        // implement your settings here
    }
}

SettingsActivity.java

package com.zakasoft.newspaperbd;

import android.os.Bundle;

import androidx.preference.PreferenceFragmentCompat;

public class SettingsFragment extends PreferenceFragmentCompat {
    @Override
    public void onCreatePreferences(Bundle savedInstanceState, String s) {
        addPreferencesFromResource(R.xml.preferences);
        // implement your settings here
    }
}

Get Value

SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(getActivity().getApplicationContext());
Boolean x = prefs.getBoolean("switch_settings_key",false);
Log.d("i/key", x.toString());

activity_preferences.xml

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

    <com.google.android.material.appbar.AppBarLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:theme="@style/AppTheme.AppBarOverlay">

        <androidx.appcompat.widget.Toolbar
            android:id="@+id/toolbar"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:background="@color/colorPrimary"
            android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">

            <TextView
                android:id="@+id/toolbar_title"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_gravity="center"
                android:text="Settings"
                android:textAppearance="@style/TextAppearance.Widget.AppCompat.Toolbar.Title"
                android:textColor="@android:color/white"
                android:textSize="16sp" />
        </androidx.appcompat.widget.Toolbar>


    </com.google.android.material.appbar.AppBarLayout>


    <FrameLayout
        android:id="@+id/container"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_behavior="@string/appbar_scrolling_view_behavior" />


</androidx.coordinatorlayout.widget.CoordinatorLayout>

preferences.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.preference.PreferenceScreen
    xmlns:android="http://schemas.android.com/apk/res/android">

    <androidx.preference.PreferenceCategory android:title="General Settings">

        <androidx.preference.Preference
            android:key="general_settings_key"
            android:title="Preference Test" />

        <androidx.preference.SwitchPreferenceCompat
            android:defaultValue="true"
            android:key="switch_settings_key"
            android:title="Switch" />

    </androidx.preference.PreferenceCategory>


    <androidx.preference.PreferenceCategory android:title="Other">

        <androidx.preference.Preference
            android:key="about_settings_key"
            android:title="About Me" />


    </androidx.preference.PreferenceCategory>


</androidx.preference.PreferenceScreen>

Load the fragment from main

package com.zakasoft.newspaperbd;

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.fragment.app.Fragment;
import androidx.fragment.app.FragmentTransaction;
import androidx.preference.PreferenceManager;

import android.app.FragmentManager;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.util.Log;
import android.view.MenuItem;

import com.google.android.material.bottomnavigation.BottomNavigationMenu;
import com.google.android.material.bottomnavigation.BottomNavigationView;

public class MainActivity2 extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main3);




        Fragment fragmenthome, fragmentsearch, fragmentsettings, fragmentmore, fragmentset;
        fragmenthome = new BlankFragment1();
        fragmentsettings = new BlankFragment3();
        fragmentmore = new BlankFragment1();
        fragmentsearch = new BlankFragment2();
        fragmentset = new SettingsFragment();


        loadFragment(fragmenthome);

        BottomNavigationView bottomNavigationView;

        bottomNavigationView = (BottomNavigationView)findViewById(R.id.bottomNavigationView);

        bottomNavigationView.setOnNavigationItemSelectedListener(
                new BottomNavigationView.OnNavigationItemSelectedListener() {
                    @Override
                    public boolean onNavigationItemSelected(@NonNull MenuItem item) {
                        switch (item.getItemId()) {
                            case R.id.mnuhome:
                            loadFragment(fragmenthome);break;

                            case R.id.mnusearch:
                                loadFragment(fragmentsearch);break;

                            case R.id.mnusettings:
                                //Intent i = new Intent(getApplicationContext(), SettingsActivity.class);
                                //startActivity(i);

                                loadFragment(fragmentset);break;

                            case R.id.mnumore:

                        }
                        return true;
                    }
                });





    }




    private void loadFragment(Fragment fragment) {
        // load fragment
        FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
//frame_container is your layout name in xml file
        transaction.replace(R.id.flFragment, fragment);
        transaction.addToBackStack(null);
        transaction.commit();
    }
}