How to get view from drawer header layout with binding in activity?

Question

So this is my activity_main.xml:

<?xml version="1.0" encoding="utf-8"?>
<layout 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"
        tools:context="MainActivity"
    >
    <!-- A DrawerLayout is intended to be used as the top-level content view using match_parent for both width and height to consume the full space available. -->
    <android.support.v4.widget.DrawerLayout
        android:id="@+id/drawer_layout"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        >

        <!-- As the main content view, the view below consumes the entire
             space available using match_parent in both dimensions. -->

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

            <LinearLayout
                android:id="@+id/ll_container"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:orientation="vertical">

                <android.support.v7.widget.Toolbar
                    android:id="@+id/my_awesome_toolbar"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:background="@android:color/black"
                    android:fitsSystemWindows="true"
                    >

                    <TextView
                        android:id="@+id/toolbar_title"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_marginLeft="10dp"
                        android:layout_marginStart="10dp"
                        android:textColor="@android:color/white"
                        android:textSize="@dimen/abc_text_size_title_material_toolbar"
                        tools:text="@string/default_toolbar_title"/>

                </android.support.v7.widget.Toolbar>


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

                </FrameLayout>
            </LinearLayout>

            <android.support.design.widget.FloatingActionButton
                android:id="@+id/fab_fuf"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_alignParentBottom="true"
                android:layout_alignParentEnd="true"
                android:layout_alignParentRight="true"
                android:layout_marginBottom="20dp"
                android:layout_marginEnd="20dp"
                android:layout_marginRight="20dp"
                android:src="@drawable/flamme"
                app:fabSize="normal"
                />
        </RelativeLayout>

        <android.support.design.widget.NavigationView
            android:id="@+id/navigation_view"
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:layout_gravity="start"
            android:background="@android:color/black"
            **app:headerLayout="@layout/drawer_header"**
            app:itemTextColor="@color/drawer_item_color_selector"
            app:menu="@menu/menu_drawer"/>

    </android.support.v4.widget.DrawerLayout>
</layout>

and I am using binding for the activity so I don't have to use the findViewById and cast it etc.. like this:

ActivityMainBinding binding = DataBindingUtil.setContentView(this, R.layout.activity_main);

        Toolbar toolbar = binding.myAwesomeToolbar;
        toolbarTitle = binding.toolbarTitle;
        BalrogFontsHelper.SetKhandBoldToView(toolbarTitle);
        setSupportActionBar(toolbar);
        final ActionBar actionBar = getSupportActionBar();
        if (actionBar != null) {
            actionBar.setHomeAsUpIndicator(R.drawable.ic_dehaze_white_24);
            actionBar.setDisplayHomeAsUpEnabled(true);
            actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_STANDARD);
            actionBar.setDisplayShowTitleEnabled(false);
        }


        drawerLayout = binding.drawerLayout;
        **tvLoggedUserEmail = (TextView) findViewById(R.id.tv_logged_user_email);**
        BalrogFontsHelper.SetKhandBoldToView(tvLoggedUserEmail);

As you can see, I can get the views that are directly in the activity_main.xml layout by binding but when the view I am trying to get is not there I can't see the variable in the binding object.

drawer_header.xml:

    <?xml version="1.0" encoding="utf-8"?>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
                android:layout_width="match_parent"
                android:layout_height="96dp"
                xmlns:tools="http://schemas.android.com/tools"
                android:background="@android:color/black"
                android:theme="@style/ThemeOverlay.AppCompat.Dark">


    <TextView
        android:id="@+id/tv_logged_user_email"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerVertical="true"
        android:layout_marginLeft="16dp"
        tools:text="@string/login_placeholder_email"
        android:textAllCaps="true"
        android:textAppearance="@style/TextAppearance.AppCompat.Body2"
        android:textSize="20sp"/>


</RelativeLayout>

How could I get this tv_logged_user_email TextView in a binding way so I have:

**tvLoggedUserEmail = binding.tvLoggedUserEmail;**

Answer 1

Updated solution (13/11/2015)

Solution: Update your Design Support Library to 23.1.1:

Changes for Design Support library 23.1.1:

• Added the getHeaderView method to the NavigationView class.
• Fixed a transparent background issue for a FloatingActionButton object on devices running Android 4.0 (API level 15) and lower. (Issue 183315)

See https://developer.android.com/tools/support-library/index.html for more info

---

Original solution

I don't know why there is no method which provides header view attached programmatically.

Instead, here's two solutions:

NavigationView navigationView = (NavigationView) findViewById(R.id.navigation);
View headerView = navigationView.inflateHeaderView(R.layout.header_layout)
ImageView iv = (ImageView)headerview.findViewById(R.id.your_image_view)

Or:

NavigationView navigationView = (NavigationView) findViewById(R.id.navigation);
View headerView = LayoutInflater.from(this).inflate(R.layout.header_layout, navigationView, false);
navigationView.addHeaderView(headerView);

ImageView iv = (ImageView) headerView.findViewById(R.id.yourImageView)