How to add a HeaderView to Navigation Drawer in Kotlin

In this android kotlin source code example, we are going to add a HeaderView to Navigation Drawer in Kotlin.

You can copy and adopt this source code example to your Kotlin android project without reinventing the wheel.

Below is a step by step source code to add a HeaderView to Navigation Drawer in Kotlin.

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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"
    xmlns:tools="http://schemas.android.com/tools"
    tools:context=".Navigation.NavigationActivity3">

    <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" />

    <androidx.drawerlayout.widget.DrawerLayout
        android:id="@+id/drawerLayout"
        android:layout_height="match_parent"
        android:layout_width="match_parent"
        android:layout_below="@id/toolbar">

        <androidx.appcompat.widget.AppCompatTextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Navigation Drawer"
            android:gravity="center_horizontal|center_vertical"/>

        <com.google.android.material.navigation.NavigationView
            android:id="@+id/navigationView"
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:layout_gravity="start"
            app:itemTextColor="#000000"
            app:menu="@menu/drawermenu" />

    </androidx.drawerlayout.widget.DrawerLayout>

</RelativeLayout>

layout/drawer_header.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="178dp"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:background="#9c9c9c"
    android:gravity="bottom"
    android:orientation="vertical"
    android:padding="16dp"
    android:theme="@style/ThemeOverlay.AppCompat.Dark">

    <androidx.appcompat.widget.AppCompatImageView
        android:id="@+id/profile_image"
        android:layout_width="70dp"
        android:layout_height="70dp"
        android:layout_marginTop="15dp"
        android:src="@mipmap/ic_launcher"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"/>

    <androidx.appcompat.widget.AppCompatTextView
        android:id="@+id/username_field"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@+id/profile_image"
        android:text="Username"
        android:textAppearance="@style/TextAppearance.AppCompat.Body1"
        android:textStyle="bold"
        app:layout_constraintTop_toBottomOf="@id/profile_image"/>

    <androidx.appcompat.widget.AppCompatTextView
        android:id="@+id/email_field"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@+id/username_field"
        android:text="Email"
        android:textAppearance="@style/TextAppearance.AppCompat.Body1"
        app:layout_constraintTop_toBottomOf="@id/username_field"/>

</androidx.constraintlayout.widget.ConstraintLayout>

menu/drawermenu.xml

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
    <item
        android:id="@+id/nav_item_home"
        android:title="@string/home"/>
    <item
        android:id="@+id/nav_item_blog"
        android:title="@string/blog"/>
    <item
        android:id="@+id/nav_item_app"
        android:title="@string/App"/>
</menu>

MainActivity.kt

import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import androidx.appcompat.app.ActionBarDrawerToggle
import androidx.appcompat.widget.Toolbar
import androidx.drawerlayout.widget.DrawerLayout
import com.bluapp.kotlinview.R
import com.google.android.material.navigation.NavigationView

class NavigationActivity3 : AppCompatActivity() {
    private var mDrawerLayout: DrawerLayout? = null
    private var mNavigationView: NavigationView? = null
    private var toolbar: Toolbar? = null

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_navigation3)
        toolbar = findViewById(R.id.toolbar) as Toolbar
        setSupportActionBar(toolbar)
        mDrawerLayout = findViewById(R.id.drawerLayout) as DrawerLayout
        mNavigationView = findViewById(R.id.navigationView) as NavigationView
        val inflater = layoutInflater;
        val listHeaderView = inflater.inflate(R.layout.drawer_header, null, false);
        mNavigationView!!.addHeaderView(listHeaderView)
        val mDrawerToggle = ActionBarDrawerToggle(this, mDrawerLayout, toolbar, R.string.app_name, R.string.app_name)
        mDrawerLayout!!.addDrawerListener(mDrawerToggle)
        mDrawerToggle.syncState()
    }
}

values/styles.xml

 <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
        <!-- Customize your theme here. -->
        <item name="colorPrimary">@color/colorPrimary</item>
        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
        <item name="colorAccent">@color/colorAccent</item>
    </style>
<style name="AppTheme.AppBarOverlay" parent="ThemeOverlay.AppCompat.Dark.ActionBar" />

    <style name="AppTheme.PopupOverlay" parent="ThemeOverlay.AppCompat.Light" />

    <style name="AppTheme.NoActionBar">
        <item name="windowActionBar">false</item>
        <item name="windowNoTitle">true</item>
        <item name="android:windowDrawsSystemBarBackgrounds">true</item>
    </style>

AndroidManifest.xml

<activity
            android:name=".Navigation.NavigationActivity3"
            android:theme="@style/AppTheme.NoActionBar" />

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