Android Navigation Architecture Component with Bottom Navigation View Step by Step Implementation

1. Add Navigation Architecture Component & Material Design Dependencies

//navigation architecture component
 implementation “androidx.navigation:navigation-fragment-ktx:2.3.0”
 implementation “androidx.navigation:navigation-ui-ktx:2.3.0”
// material design
 implementation ‘com.google.android.material:material:1.2.0’

2. Create Menu Resource for Bottom Navigation View (res/menu/menu_bottom_sheet_main.xml)

<?xml version=”1.0" encoding=”utf-8"?>
<menu xmlns:android=”http://schemas.android.com/apk/res/android"       
    <item
        android:id=”@+id/nav_personal”
        android:icon=”@drawable/ic_personal”
        android:title=”Personal” />
    <item
        android:id=”@+id/nav_transaction”
        android:icon=”@drawable/ic_transaction”
        android:title=”Transaction” />
    <item
        android:id=”@+id/nav_promotional”
        android:icon=”@drawable/ic_promotional”
        android:title=”Promotional” />
    <item
        android:id=”@+id/nav_blocked”
        android:icon=”@drawable/ic_blocked”
        android:title=”Blocked” />
</menu>

3. Add BottomNavigationView to Activity XML (activity_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”>
 <com.google.android.material.bottomnavigation.BottomNavigationView
        android:id=”@+id/main_bottom_navigation_view”
        android:layout_width=”match_parent”
        android:layout_height=”wrap_content”
        app:labelVisibilityMode=”labeled”
        app:layout_constraintBottom_toBottomOf=”parent”
        app:layout_constraintEnd_toEndOf=”parent”
        app:layout_constraintStart_toStartOf=”parent”
        app:menu=”@menu/menu_bottom_sheet_main” />
</androidx.constraintlayout.widget.ConstraintLayout>

4. Create Fragment for each of the menu items

PersonalFragment
TransactionFragment
PromotionalFragment
BlockedFragment

5. Create a new Navigation resource file (res/navigation/nav_manin.xml)

<?xml version=”1.0" encoding=”utf-8"?>
<navigation 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:id=”@+id/nav_main”
 app:startDestination=”@id/nav_personal”>
    <fragment
        android:id=”@+id/nav_personal”         android:name=”com.jay.navigationarchdemo.ui.personal.PersonalFragment”
        android:label=”personal_fragment”
        tools:layout=”@layout/personal_fragment” />
    <fragment
        android:id=”@+id/nav_transaction”         android:name=”com.jay.navigationarchdemo.ui.transaction.TransactionFragment”
        android:label=”transaction_fragment”
        tools:layout=”@layout/transaction_fragment” />
    
    <fragment
        android:id=”@+id/nav_promotional”
        android:name=”com.jay.navigationarchdemo.ui.promotional.PromotionalFragment”
        android:label=”promotional_fragment”
        tools:layout=”@layout/promotional_fragment” />
    <fragment
        android:id=”@+id/nav_blocked”
        android:name=”com.jay.navigationarchdemo.ui.blocked.BlockedFragment”
        android:label=”blocked_fragment”
        tools:layout=”@layout/blocked_fragment” />
</navigation>

NOTE: make sure id of the fragment should match with the id specified in menu_bottom_sheet_main.xml

6. Add nav host fragment in activity XML (activity_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/main_fragment_nav_host”
        android:name=”androidx.navigation.fragment.NavHostFragment”
        android:layout_width=”0dp”
        android:layout_height=”0dp”
        app:defaultNavHost=”true”
         app:layout_constraintBottom_toTopOf=”@id/main_bottom_navigation_view”
        app:layout_constraintEnd_toEndOf=”parent”
        app:layout_constraintStart_toStartOf=”parent”
        app:layout_constraintTop_toTopOf=”parent”
        app:navGraph=”@navigation/nav_main” />
     <com.google.android.material.bottomnavigation.BottomNavigationView
        android:id=”@+id/main_bottom_navigation_view”
        android:layout_width=”match_parent”
        android:layout_height=”wrap_content”
        app:labelVisibilityMode=”labeled”
        app:layout_constraintBottom_toBottomOf=”parent”
        app:layout_constraintEnd_toEndOf=”parent”
        app:layout_constraintStart_toStartOf=”parent”
        app:menu=”@menu/menu_bottom_sheet_main” />
</androidx.constraintlayout.widget.ConstraintLayout>

7. Setup Bottom Navigation View with Nav Controller (MainActivity.kt)

package com.jay.navigationarchdemo
import android.os.Bundle
import androidx.appcompat.app.AppCompatActivity
import androidx.navigation.findNavController
import androidx.navigation.ui.setupWithNavController
import com.google.android.material.bottomnavigation.BottomNavigationView
class MainActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        val navController = findNavController(R.id.main_fragment_nav_host)
        val bottomNavigationView =  findViewById<BottomNavigationView>(R.id.main_bottom_navigation_view)
        bottomNavigationView.setupWithNavController(navController)
    }
}