Dynamic Fragments : Bottom Navigation Bar

 Bottom Navigation Bar

mainActivity.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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:gravity="center"
    android:orientation="vertical"
    tools:context=".ShowImage">


    <FrameLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <FrameLayout
            android:id="@+id/frame_container"
            android:layout_width="match_parent"
            android:layout_height="match_parent" />

        <LinearLayout
            android:layout_width="350dp"
            android:layout_height="60dp"
            android:layout_gravity="bottom|center"
            android:layout_marginBottom="50dp"
            android:background="@drawable/shape"
            android:gravity="center_vertical">

            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:layout_weight="1"
                android:id="@+id/btn"
                android:gravity="center">

                <ImageView
                    android:layout_width="30dp"
                    android:layout_height="30dp"
                    android:src="@drawable/ic_outline_home_24"
                    android:tint="@color/white" />
            </LinearLayout>

            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:layout_weight="1"
                android:id="@+id/btn1"
                android:gravity="center">

                <ImageView
                    android:layout_width="30dp"
                    android:layout_height="30dp"
                    android:src="@drawable/ic_baseline_search_24"
                    android:tint="@color/white" />
            </LinearLayout>

            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:layout_weight="1"
                android:id="@+id/btn2"
                android:gravity="center">

                <ImageView
                    android:layout_width="30dp"
                    android:layout_height="30dp"
                    android:src="@drawable/ic_outline_settings_24"
                    android:tint="@color/white" />
            </LinearLayout>


        </LinearLayout>
    </FrameLayout>

</LinearLayout>

mainActivity.Java

package com.example.myapplication10;

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

import android.app.DatePickerDialog;
import android.app.TimePickerDialog;
import android.location.LocationManager;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.DatePicker;
import android.widget.FrameLayout;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.MediaController;
import android.widget.TimePicker;
import android.widget.Toast;
import android.widget.VideoView;

import com.bumptech.glide.Glide;
import com.example.myapplication10.Fragment.BottomFragment;
import com.example.myapplication10.Fragment.HomeFragment;
import com.google.android.gms.tasks.OnCompleteListener;
import com.google.android.gms.tasks.OnFailureListener;
import com.google.android.gms.tasks.OnSuccessListener;
import com.google.android.gms.tasks.Task;
import com.google.firebase.storage.FirebaseStorage;
import com.google.firebase.storage.ListResult;
import com.google.firebase.storage.StorageReference;

import java.util.ArrayList;
import java.util.Calendar;
import java.util.List;

public class ShowImage extends AppCompatActivity {


    private FrameLayout frame_container;
    private LinearLayout btn,btn1;

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

        loadFragment(new HomeFragment());

        frame_container = findViewById(R.id.frame_container);
        btn = findViewById(R.id.btn);
        btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                HomeFragment homeFragment = new HomeFragment();

                loadFragment(homeFragment);
            }
        });

        btn1 = findViewById(R.id.btn1);
        btn1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                BottomFragment bottomFragment=new BottomFragment();
                loadFragment(bottomFragment);
            }
        });

    }

    void loadFragment(Fragment fragment) {

        FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();
        fragmentTransaction.replace(R.id.frame_container, fragment);
        fragmentTransaction.commit();
    }
}

NOTE : CREATE A NEW FRAGMENT & SET OBJECT OF FRAGMENT IN CLICK OF BUTTON