How to data bind to a header?

Question

I have a main activity with a side navigation drawer in the action bar, specified as follows (note that a lot of code has been omitted for brevity) in default_screen.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="190dp"     android:background="@drawable/honeycomb"     android:orientation="vertical"     >     <android.support.design.widget.NavigationView         android:id="@+id/navigation_view"         android:layout_height="match_parent"         android:layout_width="wrap_content"         android:layout_gravity="start"         app:headerLayout="@layout/header"         app:menu="@menu/drawer"         /> 

where layout/header is as follows (again, a bunch of lines omitted for brevity):

<data>     <variable name="user" type="oose2017.place2b.ClientUser"/> </data> <TextView         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:text="@{user.displayName}"         android:textSize="14sp"         android:textColor="#FFF"         android:textStyle="bold"         android:gravity="left"         android:paddingBottom="4dp"         android:id="@+id/username"         android:layout_above="@+id/email"         android:layout_alignLeft="@+id/profile_image"         android:layout_alignStart="@+id/profile_image" /> </RelativeLayout> 

Where I instantiate my default_screen in the main activity as follows:

  setContentView(R.layout.default_screen); 

How do I data bind to the header? I have tried a few things unsuccessfully, mainly:

DefaultScreenBinding binding = DataBindingUtil.setContentView(R.layout.default_screen); 

Which does not work. How can I do this?

Answer 1

Valid solution will be following, add header view in main activity OnCreate:

protected void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         binding = DataBindingUtil.setContentView(this, R.layout.activity_main);          NavHeaderMainBinding _bind = DataBindingUtil.inflate(getLayoutInflater(), R.layout.nav_header_main, binding                 .navView, false);         binding.navView.addHeaderView(_bind.getRoot());         _bind.setUser(Session.getUserProfile()); }