Vfrdtyky

I have a DataBinding class ActivityMainBinding where the XMl looks like this

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

    <layout>

    <android.support.design.widget.CoordinatorLayout 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/container"

        android:layout_width="match_parent"

        android:layout_height="match_parent"

        tools:context=".MainActivity">



        <include layout="@layout/content_main" />



        <android.support.design.widget.FloatingActionButton

            android:id="@+id/fab"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:layout_gravity="bottom|end"

            android:layout_margin="@dimen/fab_margin"

            app:srcCompat="@drawable/ic_add" />



    </android.support.design.widget.CoordinatorLayout>

    </layout>

And the content_main.xml is another binding

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

    <layout>



        <android.support.constraint.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"

            tools:showIn="@layout/activity_main">



            <android.support.v7.widget.RecyclerView

                android:id="@+id/recyclerView"

                android:layout_width="0dp"

                android:layout_height="0dp"

                android:clickable="true"

                android:focusable="true"

                android:focusableInTouchMode="true"

                android:scrollbars="vertical"

                app:layout_constraintBottom_toBottomOf="parent"

                app:layout_constraintLeft_toLeftOf="parent"

                app:layout_constraintRight_toRightOf="parent"

                app:layout_constraintTop_toTopOf="parent" />



        </android.support.constraint.ConstraintLayout>

    </layout>

Now, in my activity I set the content view like this.

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

Now I can access all XML elemets using this binding. like

        Toolbar toolbar = activityMainBinding.toolbar;            

but some of my widgets are in the included layout which is ContentMainBinding

Now, how can I create a ContentMainBinding instance from ActivityMainBinding ?

I tried

        contentMainBinding = DataBindingUtil.getBinding(activityMainBinding.container);

But, its crashing with error

         ActivityMainBindingImpl cannot be cast to ContentMainBinding                 

There is no need to add <layout>----</layout> tag in your content_main.xml file. You need to set id of included layout like :

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

    <layout>

    <android.support.design.widget.CoordinatorLayout 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/container"

        android:layout_width="match_parent"

        android:layout_height="match_parent"

        tools:context=".MainActivity">



        <include layout="@layoutcontent_main" android:id="@+id/contentMain" />



        <android.support.design.widget.FloatingActionButton

            android:id="@+id/fab"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:layout_gravity="bottom|end"

            android:layout_margin="@dimen/fab_margin"

            app:srcCompat="@drawable/ic_add" />



    </android.support.design.widget.CoordinatorLayout>

    </layout>

Then you can directly access included layout view using

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

activityMainBinding.contentMain.recyclerView.setAdapter();

Add id to include tag

<include

    android:id="@+id/included"

    layout="@layout/content_main"/>

And in code use

activityMainBinding.included.recyclerView

Check that link