How to include constraint layout to another constraint layout and set constraint between each

I'm using constraintLyout v 1.0.1.

I would like to include in my xml a sub ConstraintLayout corresponding to a part of my global layout (which itself is a ConstraintLayout). I split the layout in two xmls in order to use this sub part elsewhere

I tried this but I have no control on where to place my sub constraint layout in the parent. I wonder if I have to place everything in the same xml file or if their is a solution to use separate files.

tmp_1.xml

<android.support.constraint.ConstraintLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    >
    <TextView
        android:id="@+id/label"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="LABEL1"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        android:layout_marginTop="16dp"
        />
    <TextView
        android:id="@+id/label_2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="LABEL2"
        app:layout_constraintStart_toStartOf="@id/label"
        app:layout_constraintEnd_toEndOf="@id/label"
        app:layout_constraintTop_toBottomOf="@id/label"
        android:layout_marginTop="16dp"
        />

    <include layout="@layout/tmp_2" />
</android.support.constraint.ConstraintLayout>

tmp_2.xml

<android.support.constraint.ConstraintLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    >
    <TextView
        android:id="@+id/view_80"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="80th element"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        android:layout_marginTop="10dp"
        android:layout_marginStart="12dp"
        />
</android.support.constraint.ConstraintLayout>

The result is this

But i want it to be this

I tried this but it does not work

<include 
    app:layout_constraintTop_toBottomOf="@id/label_2"
    layout="@layout/tmp_2" />

Actually found a solution. Android Studio does not autocomplete constraintLayout parameters in an include tag but they do have an impact on it as long as you give that include a size.

<include
        layout="@layout/tmp_2"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginTop="10dp"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/label_2"
        />

To inlude one constraint layout and constraint it according to one's need, one will have to give width and height to the included layout like this :

<include
        android:id="@+id/shop_card_layout"
        layout="@layout/shop_card_one"
        android:layout_height="wrap_content"
        android:layout_width="300dp"
        android:layout_marginTop="8dp"
        app:layout_constraintStart_toStartOf="@id/heading_tv"
        app:layout_constraintTop_toBottomOf="@+id/heading_tv" />

You could avoid the ConstraintLayout constraints at the include item. I just <include/> it as it is.

MainActivity Layout file:

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

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

    <TextView
        android:id="@+id/textView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginBottom="8dp"
        android:layout_marginEnd="8dp"
        android:layout_marginStart="8dp"
        android:layout_marginTop="8dp"
        android:text="CONTENTS"
        app:layout_constraintBottom_toBottomOf="@+id/footerLayout"
        app:layout_constraintEnd_toEndOf="@+id/footerLayout"
        app:layout_constraintStart_toStartOf="@+id/footerLayout"
        app:layout_constraintTop_toTopOf="@+id/footerLayout" />

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

</android.support.constraint.ConstraintLayout>

ToolBar Layout file:

<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">

    <android.support.v7.widget.Toolbar
        android:id="@+id/toolbar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@color/colorPrimary"
        android:minHeight="?attr/actionBarSize"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
        app:popupTheme="@style/ThemeOverlay.AppCompat.Light">

        <TextView
            android:id="@+id/toolbarTitleTextView"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            android:text="@string/hidden"
            android:textColor="@android:color/white"
            tools:layout_editor_absoluteX="192dp"
            tools:layout_editor_absoluteY="19dp" />

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

To include one constraint layout to other contraint layout to use one more contrsaint layout to each parent of include layout... Like below:

<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"
android:background="@drawable/new_landing_bg"
tools:context=".activity.DesignTestActivity">

<android.support.constraint.ConstraintLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginStart="16dp"
    android:layout_marginEnd="16dp"
    android:layout_marginBottom="8dp"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toStartOf="parent">

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

</android.support.constraint.ConstraintLayout>

this is work on my xml layout. Enjoy code.

We can use a layout tag if using Constraint layout. For Linear layout we can directly include the layout.

I had a different requirement where i am having a tab view below toolbar. I had set toolbar elevation to 0dp and added a view file below the tab view so that both the tab view and toolbar looks as a single unit.

<androidx.constraintlayout.widget.ConstraintLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <com.google.android.material.tabs.TabLayout
        android:id="@+id/tabs_container"
        style="@style/tab_layout_style"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:layout_constraintTop_toTopOf="parent"
        app:tabGravity="fill"
        app:tabIndicatorFullWidth="false"
        app:tabMode="scrollable"
        app:tabSelectedTextColor="@color/text_black_app"
        app:tabTextColor="@color/txt_gray_contact_lbl" />

    <LinearLayout
        android:id="@+id/layout_elevation_view"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:layout_constraintTop_toBottomOf="@+id/tabs_container">

        <include layout="@layout/gray_view_for_elevation" />
    </LinearLayout>

    <androidx.viewpager2.widget.ViewPager2
        android:id="@+id/pager"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintHeight_percent="100"
        app:layout_constraintTop_toBottomOf="@+id/layout_elevation_view" />

</androidx.constraintlayout.widget.ConstraintLayout>

This code is for Linear layout

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/colorWhite"
    android:orientation="vertical">

    <com.google.android.material.tabs.TabLayout
        style="@style/tab_layout_style"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:elevation="@dimen/dp_4"
        app:tabGravity="fill"
        app:tabIndicatorFullWidth="false"
        app:tabMode="scrollable"/>

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

    <androidx.viewpager2.widget.ViewPager2
        android:id="@+id/view_pager"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="@color/background_gray" />

</LinearLayout>

My elevation view file

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/linear_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">

<View
    android:layout_width="wrap_content"
    android:layout_height="@dimen/dp_1"
    android:background="#80bbbbbb" />

<View
    android:layout_width="wrap_content"
    android:layout_height="@dimen/dp_1"
    android:background="#60bbbbbb" />

<View
    android:layout_width="wrap_content"
    android:layout_height="@dimen/dp_1"
    android:background="#50bbbbbb" />

Hope this will help.