Android Data Binding using include tag

The problem is that the included layout isn't being thought of as a data-bound layout. To make it act as one, you need to pass a variable:

buttons.xml:

<layout xmlns:andr...>  <data>    <variable name="foo" type="int"/>  </data>  <Button    android:id="@+id/button"    ...." />

main.xml:

<layout xmlns:andr......   <include layout="@layout/buttons"            android:id="@+id/buttons"            app:foo="@{1}"/>....

Then you can access buttons indirectly through the buttons field:

MainBinding binding = MainBinding.inflate(getLayoutInflater());binding.buttons.button

As of 1.0-rc4 (just released), you no longer need the variable. You can simplify it to:

buttons.xml:

<layout xmlns:andr...>  <Button    android:id="@+id/button"    ...." />

main.xml:

<layout xmlns:andr......   <include layout="@layout/buttons"            android:id="@+id/buttons"/>....

Easy Complete Example

Just set id to included layout, and use binding.includedLayout.anyView.

This example helps passing a value to <include & accessing included views in code.

Step 1

You have layout_common.xml, want to pass String to included layout.

You will create String variable in layout and refer this String to TextView.

<data>    // declare fields    <variable        name="passedText"        type="String"/></data><TextView    android:id="@+id/textView"    ...    android:text="@{passedText}"/> //set field to your view.

Step 2

Include this layout to parent layout. Give an id to included layout, so that we can use that in binding class. Now you can pass String passedText to your <include tag.

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">    <LinearLayout        ..        >        <include            android:id="@+id/includedLayout"            layout="@layout/layout_common"            app:passedText="@{@string/app_name}" // here we pass any String             />    </LinearLayout></layout>

• You can use now binding.includedLayout.textView in your class.

• You can pass any variables to included layout like above.

  ActivityMainBinding binding = DataBindingUtil.setContentView(this, R.layout.activity_main);binding.includedLayout.textView.setText("text");

Note Both layouts (parent & included) should be binding layout, wrapped with <layout

just set an id for your include layout

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

then

BUTTONSBINDING binding = yourMainBinding.layout;

BUTTONSBINDING is res/layout/buttons.xml

now :

binding.button.setText("simple_Way");