Bottom Navigation Android Example using Fragments||Programmer hubs just for programmer|| Programmer Rohit Sharma

 Today I'm Discuss about the bottom navigation view in android with java.

Bottom Navigation Android Example using Fragments

so let's start the Xml Design Phase :-

activity_main.xml

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

    <FrameLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/fragementConatiner">
        <com.google.android.material.bottomnavigation.BottomNavigationView
            android:layout_width="match_parent"
            android:id="@+id/bottomnavigation"
            android:layout_gravity="bottom"
            android:layout_height="wrap_content"
            app:menu="@menu/bottom"
            android:background="@color/colorAccent"
            />
    </FrameLayout>
</RelativeLayout>

bottom.xml

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
<item android:id="@+id/menu_home"
    android:title="Home"
    android:icon="@drawable/ic_home"/>
    <item android:id="@+id/menu_dashboard"
        android:title="Dashboard"
        android:icon="@drawable/ic_baseline_dashboard_24"/>
    <item android:id="@+id/notification"
        android:title="Notification"
        android:icon="@drawable/ic_notification"
        />
</menu>

load method:-

private boolean loadfragment(Fragment fragment)
{
    if(fragment!=null)
    {
        getSupportFragmentManager().beginTransaction().replace(R.id.fragementConatiner,fragment).commit();
        return  true;
    }
    return false;
}
    }

main_activity.java

package com.example.demodb;

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

import android.os.Bundle;
import android.view.MenuItem;

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

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        BottomNavigationView navigationView = (BottomNavigationView) findViewById(R.id.bottomnavigation);
        navigationView.setOnNavigationItemSelectedListener(new BottomNavigationView.OnNavigationItemSelectedListener() {
            @Override
            public boolean onNavigationItemSelected(@NonNull MenuItem item) {
                Fragment frg = null;
                switch (item.getItemId()) {
                    case R.id.menu_home:
                        frg = new HomeFragment();
                        break;
                    case R.id.menu_dashboard:
                        frg = new DashboardFragment();
                        break;
                    case R.id.notification:
                        frg=new NotificationFragment();
                }
                return loadfragment(frg);
            }
        });
        loadfragment(new HomeFragment());
    }

private boolean loadfragment(Fragment fragment)
{
    if(fragment!=null)
    {
        getSupportFragmentManager().beginTransaction().replace(R.id.fragementConatiner,fragment).commit();
        return  true;
    }
    return false;
}
    }

fragement xml code

HomeFragment.xml

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".HomeFragment">

    <!-- TODO: Update blank fragment layout -->
    <TextView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:text="Home Fragment"
        android:layout_marginTop="70dp"
        android:textSize="25dp"
        android:textColorHint="#000"
        android:textColor="#000"
        android:textStyle="bold"
        android:textAlignment="center"
        />

</FrameLayout>

NotificationFragment.xml

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".NotificationFragment">

    <!-- TODO: Update blank fragment layout -->
    <TextView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:text="Notification Fragment"
        android:layout_marginTop="70dp"
        android:textSize="25dp"
        android:textColorHint="#000"
        android:textColor="#000"
        android:textStyle="bold"
        android:textAlignment="center"
        />

</FrameLayout>