How to bind data to a header?

Question

I have a main action with a side navigation box in the action bar, indicated below (note that a lot of code was 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 looks like this (again, for brevity, a number of lines are omitted):

<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 create an instance of default_screen in the main action as follows:

  setContentView(R.layout.default_screen);

How to bind data to a header? I tried several things unsuccessfully, basically:

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

What does not work. How can i do this?

Answer 1

A valid solution will follow, add a header to the main OnCreate action:

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());
}

Answer 2

, . : - " ", .

_screen :

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

, , :

HeaderBinding headerBinding = HeaderBinding.bind(binding.navigationView.getHeaderView(0));

binding.navigationView.getHeaderView(0) , .

headerBinding . , .

Answer 3

, , , .

NavigationView ( ), DataBindingUtil.inflate , , NavigationView.addHeaderView. , , xml NavigationView app: headerLayout . . ( , Dagger2 ).

public class MyNavigationView extends NavigationView {
    @Inject
    MyViewModel myViewModel;

    public MyNavigationView(Context context) {
        super(context);
        initialize();
    }

    public MyNavigationView(Context context, AttributeSet attrs) {
        super(context, attrs);
        initialize();
    }

    public MyNavigationView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        initialize();
    }

    private void initialize() {
        // NOTE: A private method that "injects" your view model dependency (ex: Using Dagger2)
        inject();

        NavHeaderHomeBinding binding = DataBindingUtil.inflate(LayoutInflater.from(getContext()),
                R.layout.nav_header_home,
                null,
                false);
        binding.setHomeNavDrawerViewModel(myViewModel);
        addHeaderView(binding.getRoot());
    }
}

Answer 4

:

    <android.support.design.widget.NavigationView
        android:id="@+id/nav_view"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:layout_gravity="start"
        android:fitsSystemWindows="true"
        app:headerLayout="@layout/navigation"
        app:menu="@menu/activity_drawer_drawer">


        <include
            layout="@layout/nav_header_drawer"
            bind:thisDevice="@{thisDevice}" />

, headLayout, " ". , . . , headLayout , .

.

.

, .

Answer 5

, NavigationView, : -, bind, direct headerLayout

<android.support.design.widget.NavigationView
    android:id="@+id/nav_view"
    android:layout_width="wrap_content"
    android:layout_height="match_parent"
    android:layout_gravity="start"
    android:fitsSystemWindows="true"
    app:headerLayout="@layout/nav_header_drawer"  
    app:menu="@menu/drawer">

<android.support.design.widget.NavigationView
    android:id="@+id/nav_view"
    android:layout_width="wrap_content"
    android:layout_height="match_parent"
    android:layout_gravity="start"
    android:fitsSystemWindows="true"
    app:menu="@menu/drawer">

    <include layout="@layout/nav_header_drawer"
    bind:thisDevice="@{thisDevice}" />
</android.support.design.widget.NavigationView>

, . , ( ), .

<android.support.design.widget.NavigationView
    android:id="@+id/nav_view"
    android:layout_width="wrap_content"
    android:layout_height="match_parent"
    android:layout_gravity="start"
    android:fitsSystemWindows="true"
    app:headerLayout="@layout/navigation"
    app:menu="@menu/activity_drawer_drawer">


    <include
    layout="@layout/nav_header_drawer"
    bind:thisDevice="@{thisDevice}" />
</android.support.design.widget.NavigationView>

- nav_header_drawer. , . , Java-:

ActivityDrawerBinding binding = DataBindingUtil.setContentView(this,  R.layout.activity_drawer);
binding.setThisDevice(Device.now);

. .

Link: http://tonyz93.blogspot.com.br/2016/08/learn-data-binding-of-android.html#navigationview-data-binding