ConstraintLayout how to pack keeping the same ratios of distance - android

I have a layout that exceeds the view boundaries after applying all the margins I'm looking for. I read that applying a chain will make it keep the same ratios while packing all the elements inside the view boundaries.
<?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">
<TextView
android:id="#+id/Texto2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="dsadsadsadsadasd"
app:layout_constraintTop_toBottomOf="#+id/texto1" />
<TextView
android:id="#+id/texto1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="gggggg" />
<ImageView
android:id="#+id/img"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/tut_first_img"
app:layout_constraintTop_toBottomOf="#+id/Texto2" />
<Button
android:id="#+id/botao"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="ggggggggggggggggggggg"
app:layout_constraintTop_toBottomOf="#+id/img" />
</android.support.constraint.ConstraintLayout>
This is what's happening without margins after all margins applied it will exceed the view screen. How can I compact it while keeping the ratios? Also, how can I center all views in a vertical line?


Here is the code as per your use case, pls. check:
<?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"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#00ff00">
<TextView
android:id="#+id/Texto2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="dsadsadsadsadasd"
app:layout_constraintBottom_toTopOf="#+id/img"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/texto1" />
<TextView
android:id="#+id/texto1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="gggggg"
app:layout_constraintBottom_toTopOf="#+id/Texto2"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<ImageView
android:id="#+id/img"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/common_full_open_on_phone"
app:layout_constraintBottom_toTopOf="#+id/botao"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/Texto2" />
<Button
android:id="#+id/botao"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="ggggggggggggggggggggg"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/img" />
</android.support.constraint.ConstraintLayout>
I hope it helps you, looking forward if any further help is required from my end.
Screenshot:


Try this:
<?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"
tools:context=".MainActivity">
<TextView
android:id="#+id/Texto2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:layout_marginEnd="8dp"
android:text="dsadsadsadsadasd"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/texto1" />
<TextView
android:id="#+id/texto1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:layout_marginEnd="8dp"
android:text="gggggg"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<ImageView
android:id="#+id/img"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:layout_marginEnd="8dp"
android:layout_marginBottom="8dp"
android:src="#mipmap/ic_launcher"
app:layout_constraintBottom_toTopOf="#+id/botao"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/Texto2" />
<Button
android:id="#+id/botao"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginEnd="8dp"
android:layout_marginBottom="8dp"
android:text="ggggggggggggggggggggg"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent" />
</android.support.constraint.ConstraintLayout>
Just copy paste it and let me know if it works.


I hope that the below mentioned code helps you in achieving your desired layout.
<?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"
android:background="#android:color/holo_blue_bright"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="#+id/Texto2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="dsadsadsadsadasd"
app:layout_constraintBottom_toTopOf="#id/texto1"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_chainStyle="spread" />
<TextView
android:id="#+id/texto1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="gggggg"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#id/Texto2"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintBottom_toTopOf="#id/img" />
<ImageView
android:id="#+id/img"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#android:drawable/sym_def_app_icon"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#id/texto1"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintBottom_toTopOf="#id/botao" />
<Button
android:id="#+id/botao"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="ggggggggggggggggggggg"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#id/img"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintBottom_toBottomOf="parent" />
</android.support.constraint.ConstraintLayout>
Screenshot (of the UI achieved by the above code):
The chain symbol (right most symbol; below the first view in the layout) can be used to toggle and thus apply different chain styles (as per your need), if you aren't familiar with ConstraintLayout.

Related

How to make vertical line fit with cardview?

i want to ask help for how to add vertical line in left side of cardview?
Current result
Expected result
This is the code
<?xml version="1.0" encoding="utf-8"?>
<androidx.cardview.widget.CardView
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/cvRoot"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
app:cardBackgroundColor="#color/lightPink"
app:cardCornerRadius="#dimen/spacing_x">
<androidx.constraintlayout.widget.ConstraintLayout
android:id="#+id/clContainer"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<View
android:id="#+id/viewLine"
android:layout_width="#dimen/spacing"
android:layout_height="0dp"
android:background="#color/coral"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<androidx.appcompat.widget.AppCompatImageView
android:id="#+id/ivLogo"
android:layout_width="20dp"
android:layout_height="20dp"
android:layout_marginStart="#dimen/spacing_h"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toRightOf="#id/viewLine"
app:layout_constraintTop_toTopOf="parent"
app:srcCompat="#drawable/ic_error_rounded" />
<androidx.constraintlayout.widget.Group
android:id="#+id/groupDate"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:visibility="visible"
app:constraint_referenced_ids="tvTitle,tvSubTitle" />
<androidx.appcompat.widget.AppCompatTextView
android:id="#+id/tvTitle"
style="#style/TextParagraph2.Medium"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="#dimen/spacing"
android:layout_marginTop="#dimen/spacing_h"
android:layout_marginEnd="#dimen/spacing_x"
android:textColor="#color/darkGreyBlue"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0"
app:layout_constraintStart_toEndOf="#+id/ivLogo"
app:layout_constraintTop_toTopOf="parent"
tools:text="Sorry, it’s not you, It’s us." />
<androidx.appcompat.widget.AppCompatTextView
android:id="#+id/tvSubTitle"
style="#style/TextParagraph3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="#dimen/spacing"
android:layout_marginTop="#dimen/spacing_small_x"
android:layout_marginEnd="#dimen/spacing_x"
android:layout_marginBottom="#dimen/spacing_h"
android:textColor="#color/darkGreyBlue"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0"
app:layout_constraintStart_toEndOf="#+id/ivLogo"
app:layout_constraintTop_toBottomOf="#id/tvTitle"
tools:text="Internal server problem. Please try again later" />
</androidx.constraintlayout.widget.ConstraintLayout>
</androidx.cardview.widget.CardView>
Is my code correct, if not please tell me ?
I already try many ways but still not find the match solution, If you know how fix this issue, please comment bellow, thanks
sorry for my bad english

I took your code and ran it. You are using AppCompat libraries, I'm not sure if that was the problem but I'm using androidx and it seems to work well. I just added some dummy properties for color and dimensions.
This is my result:
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.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:id="#+id/frameLayout9"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".fragments.maincontent.DummyFragment">
<androidx.cardview.widget.CardView
android:id="#+id/cvRoot"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
app:cardBackgroundColor="#color/colorPrimary"
app:cardCornerRadius="15dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent">
<androidx.constraintlayout.widget.ConstraintLayout
android:id="#+id/clContainer"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<View
android:id="#+id/viewLine"
android:layout_width="20dp"
android:layout_height="0dp"
android:background="#color/gradientEndNoDarkMode"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<androidx.appcompat.widget.AppCompatImageView
android:id="#+id/ivLogo"
android:layout_width="20dp"
android:layout_height="20dp"
android:layout_marginStart="8dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toRightOf="#id/viewLine"
app:layout_constraintTop_toTopOf="parent"
app:srcCompat="#drawable/ic_error_rounded" />
<androidx.constraintlayout.widget.Group
android:id="#+id/groupDate"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:visibility="visible"
app:constraint_referenced_ids="tvTitle,tvSubTitle" />
<TextView
android:id="#+id/tvTitle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:layout_marginEnd="8dp"
android:textColor="#color/black"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0"
app:layout_constraintStart_toEndOf="#+id/ivLogo"
app:layout_constraintTop_toTopOf="parent"
tools:text="Sorry, it’s not you, It’s us." />
<TextView
android:id="#+id/tvSubTitle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:layout_marginEnd="8dp"
android:layout_marginBottom="8dp"
android:textColor="#color/black"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0"
app:layout_constraintStart_toEndOf="#+id/ivLogo"
app:layout_constraintTop_toBottomOf="#id/tvTitle"
tools:text="Internal server problem. Please try again later" />
</androidx.constraintlayout.widget.ConstraintLayout>
</androidx.cardview.widget.CardView>
</androidx.constraintlayout.widget.ConstraintLayout>
Hope it helps!

Android Studio xml object over object

how can a put a TextView befor a Button in xml file? My textview always behind the button. I am in a constraintlayout. I want to make a little number in the top right corner of the button. I made a drawable for that, hat it looks nice.
It would be nice if someone could help! Thanks!!!
xml:
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.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:id="#+id/MainLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="at.kessapps.cookieclicker.MainActivity">
<TextView
android:id="#+id/clicker_discount"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#drawable/sale_corner"
android:text="20%"
android:textStyle="bold"
app:layout_constraintBottom_toTopOf="#+id/shopbutton"
app:layout_constraintRight_toRightOf="#id/shopbutton"
app:layout_constraintTop_toTopOf="#id/shopbutton" />
<ImageView
android:id="#+id/imageView2"
android:layout_width="350dp"
android:layout_height="80dp"
android:layout_marginTop="16dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.508"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:srcCompat="#drawable/cooltext348859404219232" />
<Button
android:id="#+id/shopbutton"
style="#style/Widget.AppCompat.Button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="16dp"
android:layout_marginBottom="16dp"
android:hapticFeedbackEnabled="false"
android:onClick="toShop"
android:text="Shop"
android:drawableLeft="#drawable/ic_store"
android:textColor="#color/colorWhite"
android:paddingLeft="5dp"
android:background="#drawable/button_neutral_background"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent" />
<ImageView
android:id="#+id/onOption"
android:layout_width="50dp"
android:layout_height="50dp"
android:layout_marginStart="16dp"
android:layout_marginBottom="16dp"
android:onClick="toOption"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:srcCompat="#drawable/optionen" />
</androidx.constraintlayout.widget.ConstraintLayout>
here a picture

Please use this layout to put the TextView on top of Button view:
You need to add android:translationZ="10dp" in TextView
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.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:id="#+id/MainLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="at.kessapps.cookieclicker.MainActivity">
<TextView
android:id="#+id/clicker_discount"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:translationZ="10dp"
android:background="#drawable/sale_corner"
android:text="20%"
android:textStyle="bold"
app:layout_constraintBottom_toTopOf="#+id/shopbutton"
app:layout_constraintRight_toRightOf="#id/shopbutton"
app:layout_constraintTop_toTopOf="#id/shopbutton" />
<ImageView
android:id="#+id/imageView2"
android:layout_width="350dp"
android:layout_height="80dp"
android:layout_marginTop="16dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.508"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:srcCompat="#drawable/cooltext348859404219232" />
<Button
android:id="#+id/shopbutton"
style="#style/Widget.AppCompat.Button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="16dp"
android:layout_marginBottom="16dp"
android:hapticFeedbackEnabled="false"
android:onClick="toShop"
android:text="Shop"
android:drawableLeft="#drawable/ic_store"
android:textColor="#color/colorWhite"
android:paddingLeft="5dp"
android:background="#drawable/button_neutral_background"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent" />
<ImageView
android:id="#+id/onOption"
android:layout_width="50dp"
android:layout_height="50dp"
android:layout_marginStart="16dp"
android:layout_marginBottom="16dp"
android:onClick="toOption"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:srcCompat="#drawable/optionen" />
</androidx.constraintlayout.widget.ConstraintLayout>

How to keep my Right item right when the constraints item on the left is gone (Constraint Layout)

I have a code as below
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<TextView
android:id="#+id/left_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Left"
android:textColor="#F40"
android:textSize="26sp"
android:visibility="gone"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toStartOf="#id/right_text"
app:layout_constraintHorizontal_chainStyle="spread_inside"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"/>
<TextView
android:id="#+id/right_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Right"
android:textColor="#F40"
android:textSize="26sp"
android:fontFamily="serif-monospace"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toEndOf="#id/left_text"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toTopOf="parent"/>
</android.support.constraint.ConstraintLayout>
It looks like below.
However, at times I need to set left_text to gone. But I still want my Right to be at the right side of the screen. How could I achieve that?
(Currently when left_text is gone, my Right went to middle as per picture below)

I manage to solve it by setting my width="0dp" and android:textAlignment="viewStart" or android:textAlignment="viewEnd"
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<TextView
android:id="#+id/left_text"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:text="Left"
android:textColor="#F40"
android:textSize="26sp"
android:textAlignment="viewStart"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toStartOf="#id/right_text"
app:layout_constraintHorizontal_chainStyle="spread_inside"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"/>
<TextView
android:id="#+id/right_text"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:text="Right"
android:textColor="#F40"
android:textSize="26sp"
android:textAlignment="viewEnd"
android:fontFamily="serif-monospace"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toEndOf="#id/left_text"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toTopOf="parent"/>
</android.support.constraint.ConstraintLayout>
The width="0dp" will take up the entire space

You need to use Barriers
Try this
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.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">
<TextView
android:id="#+id/left_text"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:text="Left"
android:textColor="#F40"
android:textSize="26sp"
android:visibility="gone"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintHorizontal_chainStyle="spread_inside"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<androidx.constraintlayout.widget.Barrier
android:id="#+id/barrier2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:constraint_referenced_ids="left_text"
app:layout_constraintEnd_toStartOf="#id/right_text"
app:barrierDirection="end" />
<TextView
android:id="#+id/right_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:fontFamily="serif-monospace"
android:text="Right"
android:textColor="#F40"
android:textSize="26sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
OUTPUT When both textview is Visible
OUTPUT When Visibility Gone of left_text
UPDATE
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.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">
<TextView
android:id="#+id/left_text"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:text="LeftLeftLeftLeftLeftLeftLeftLeftLeftLeftLeftLeftLeftLeftLeftLeftLeftLeft"
android:textColor="#F40"
android:textSize="26sp"
android:visibility="gone"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintHorizontal_chainStyle="spread_inside"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintEnd_toStartOf="#id/right_text"
app:layout_constraintTop_toTopOf="parent" />
<androidx.constraintlayout.widget.Barrier
android:id="#+id/barrier2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:constraint_referenced_ids="left_text"
app:layout_constraintEnd_toStartOf="#id/right_text"
app:barrierDirection="end" />
<TextView
android:id="#+id/right_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:fontFamily="serif-monospace"
android:text="Right"
android:textColor="#3F51B5"
android:textSize="26sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
OUTPUT When both textview is Visible
OUTPUT When Visibility Gone of left_text

You can achieve this using Guideline. check example below
<TextView
android:id="#+id/left_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Left"
android:textColor="#F40"
android:textSize="26sp"
android:visibility="gone"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toStartOf="#id/guideline10"
app:layout_constraintHorizontal_chainStyle="spread_inside"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:id="#+id/right_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:fontFamily="serif-monospace"
android:text="Right"
android:textColor="#F40"
android:textSize="26sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toEndOf="#id/guideline10"
app:layout_constraintTop_toTopOf="parent" />
<androidx.constraintlayout.widget.Guideline
android:id="#+id/guideline10"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
app:layout_constraintGuide_percent="0.50" />

My answer is similar to #Basi but I want to give extra information from my perspective:
When you work with guidelines and put your view width to wrap_content what may happen is that your view will overlap your guideline like this :
So my recommendation is to constraint both side of your view and set its width to 0dp (match_constraints ) and by doing it your view will fit into its bounds and your guideline won't overlap your view, then this will look like this now :
So if you want to use guidelines as in #Basi you better use 0dp on your width:
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent">
<androidx.constraintlayout.widget.Guideline
android:id="#+id/guideline10"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:orientation="vertical"
app:layout_constraintGuide_percent="0.5" />
<TextView
android:id="#+id/textView10"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:layout_marginEnd="8dp"
android:text="Right"
android:textColor="#F40"
android:textAlignment="textEnd"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="#+id/guideline10"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:id="#+id/textView11"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:layout_marginEnd="8dp"
android:text="Left"
android:textColor="#F40"
android:textAlignment="textStart"
app:layout_constraintEnd_toStartOf="#+id/guideline10"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
It will look like this :

You can also use SequenceLayout to make it work.
<Sequences>
<Horizontal>
<Span id="#id/left_text" size="wrap"/>
<Span size="1w"/>
<Span id="#id/right_text" size="wrap"/>
</Horizontal>
</Sequences>

I tried your code and I am curious, why do you use constraint from Left to Right and from Right to Left?
There is no need for them. If you delete those constraints you have no problem.
Just to make things clear for setting view's position you need just one horizontal and one vertical constraint.

You need bias for both TextView in Constraint Layout and app:layout_constraintStart_toStartOf="parent" of another TextView.
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<TextView
android:id="#+id/left_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Left"
android:textColor="#F40"
android:textSize="26sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toStartOf="#id/right_text"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintHorizontal_chainStyle="spread_inside"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:id="#+id/right_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginLeft="8dp"
android:fontFamily="serif-monospace"
android:text="Right"
android:textColor="#F40"
android:textSize="26sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="1.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</android.support.constraint.ConstraintLayout>

Align layout at the bottom of the screen

I would like to have the same as on the enclosed image with the scanning information widgets (progressbar, textview and button) to stay at the bottom of the screen. However when I run my app they go at the top of the screen when the ListView is empty.
I tried a lot of methods described in other topics, but I still could not make it work.
Do you have some suggestions about which layout I should use in this case?
<?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">
<ListView
android:id="#+id/ListViewDevices"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_marginBottom="60dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="1.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<FrameLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginTop="8dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/ListViewDevices">
<android.support.constraint.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<ProgressBar
android:id="#+id/progressBarDevice"
style="?android:attr/progressBarStyle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginBottom="8dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toStartOf="#+id/lblScanningStatus"
app:layout_constraintStart_toStartOf="parent" />
<TextView
android:id="#+id/lblScanningStatus"
android:layout_width="wrap_content"
android:layout_height="24dp"
android:layout_marginStart="8dp"
android:layout_marginBottom="20dp"
android:text="#string/scan_in_progress"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toEndOf="#+id/progressBarDevice" />
<Button
android:id="#+id/btnPauseScan"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="8dp"
android:layout_marginBottom="8dp"
android:text="#string/pause_scan"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent" />
</android.support.constraint.ConstraintLayout>
</FrameLayout>
</android.support.constraint.ConstraintLayout>

This is the way I did it an app I worked on previously. Using a RelativeLayout as the main shell we are able to position elements in any way inside it.
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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:layout_weight="10"
android:background="#color/white"
android:orientation="vertical">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="55dp"
android:layout_alignParentBottom="true"
android:background="#color/grey_font">
<ProgressBar
android:id="#+id/progressBarDevice"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_centerVertical="true"
android:layout_marginLeft="12dp" />
<TextView
android:id="#+id/lblScanningStatus"
android:layout_width="wrap_content"
android:layout_height="24dp"
android:layout_centerVertical="true"
android:layout_marginLeft="24dp"
android:layout_toRightOf="#id/progressBarDevice"
android:text="Scanning" />
<Button
android:layout_marginRight="16dp"
android:layout_centerVertical="true"
android:background="#color/orange_pay"
android:id="#+id/btnPauseScan"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentEnd="true"
android:layout_alignParentRight="true"
android:layout_marginBottom="8dp"
android:text="PAUSE" />
</RelativeLayout>
</RelativeLayout>

I would first simplify the layout by flattening it slightly. Removed the FrameLayout that holds the bottom Constraint.. Then made the listViewDevices constrain bottom to top of the bottom contraint layout (which i have called scanner)..
Looks correct in my layout editor.
<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">
<ListView
android:id="#+id/ListViewDevices"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_marginBottom="60dp"
app:layout_constraintBottom_toTopOf="#id/scanner"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<android.support.constraint.ConstraintLayout
android:id="#+id/scanner"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginTop="8dp"
app:layout_constraintHorizontal_bias="1"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toBottomOf="#id/ListViewDevices"
app:layout_constraintBottom_toBottomOf="parent">
<ProgressBar
android:id="#+id/progressBarDevice"
style="?android:attr/progressBarStyle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginBottom="8dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toStartOf="#+id/lblScanningStatus"
app:layout_constraintStart_toStartOf="parent" />
<TextView
android:id="#+id/lblScanningStatus"
android:layout_width="wrap_content"
android:layout_height="24dp"
android:layout_marginStart="8dp"
android:layout_marginBottom="20dp"
android:text="SCANNING FOR NEW DEVICES..."
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toEndOf="#+id/progressBarDevice" />
<Button
android:id="#+id/btnPauseScan"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="8dp"
android:layout_marginBottom="8dp"
android:text="PAUSE"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent" />
</android.support.constraint.ConstraintLayout>

I would rather prefer to add LinearLayout as root layout.
So when you scroll down or up then it will not scroll with your layout when its empty.
So when your listview is empty then also it will be in the bottom of the screen only.
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
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:orientation="vertical" >
<ListView
android:id="#+id/ListViewDevices"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="60dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="1.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<FrameLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginTop="8dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/ListViewDevices">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<ProgressBar
android:id="#+id/progressBarDevice"
style="?android:attr/progressBarStyle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginBottom="8dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toStartOf="#+id/lblScanningStatus"
app:layout_constraintStart_toStartOf="parent" />
<TextView
android:id="#+id/lblScanningStatus"
android:layout_width="wrap_content"
android:layout_height="24dp"
android:layout_marginStart="8dp"
android:layout_marginBottom="20dp"
android:text="#string/scan_in_progress"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toEndOf="#+id/progressBarDevice" />
<Button
android:id="#+id/btnPauseScan"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="8dp"
android:layout_marginBottom="8dp"
android:text="#string/pause_scan"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent" />
</LinearLayout>
</FrameLayout>
</LinearLayout>

Thank you for your answers but none of them works. Sometimes it looks fine in Android Studio but when I test my application on a real phone the widgets are displayed on top of the screen.
If I will find a working solution I will post it here.

How to handle the following case for ConstraintLayout, when one of the targets of layout_constraint visibility changed to View.GONE

I want to avoid nested layout, to improve my app performance.
Hence, I tried the following
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_margin="30dp"
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">
<TextView
android:id="#+id/title_text_view"
android:background="#ffd600"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:text="Title\nTitle"
app:layout_constraintEnd_toStartOf="#+id/pin_text_view"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:id="#+id/pin_text_view"
android:background="#ff0000"
android:textColor="#ffffff"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toTopOf="parent"
android:text="Pin" />
<TextView
android:id="#+id/body_text_view"
android:background="#304ffe"
android:textColor="#ffffff"
android:layout_width="0dp"
android:layout_height="0dp"
app:layout_constraintTop_toBottomOf="#+id/title_text_view"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintEnd_toEndOf="parent"
android:text="Body" />
</android.support.constraint.ConstraintLayout>
The output is as follow.
During runtime, I might change the visibility of title_text_view (yellow) to View.GONE.
But, it will looks like the follow. I don't wish pin_text_view (red) to be covered up by body_text_view (blue)
What I wish to have is
One of the way to overcome, is after changing the visibility of title_text_view (yellow) to View.GONE, I need use Java code to manual update app:layout_constraintTop_toBottomOf of body_text_view (blue) - Android : How to programatically set layout_constraintRight_toRightOf "parent"
From
<TextView
android:id="#+id/body_text_view"
...
app:layout_constraintTop_toBottomOf="#+id/title_text_view"
to
<TextView
android:id="#+id/body_text_view"
...
app:layout_constraintTop_toBottomOf="#+id/pin_text_view"
But, this will make my code more difficult to be maintained.
Is there any easier way, without involving Java code, and without nested layout?

You can use a barrier, which is available in ConstraintLayout since version 1.1
So if you are using an older version of ConstraintLayout, change the dependency for ConstraintLayout in your build.gradle to
implementation 'com.android.support.constraint:constraint-layout:1.1.0'
or a later version.
Then add the barrier to your layout like following:
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_margin="30dp"
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">
<TextView
android:id="#+id/title_text_view"
android:background="#ffd600"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:text="Title\nTitle"
app:layout_constraintEnd_toStartOf="#+id/pin_text_view"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:id="#+id/pin_text_view"
android:background="#ff0000"
android:textColor="#ffffff"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toTopOf="parent"
android:text="Pin" />
<android.support.constraint.Barrier
android:id="#+id/barrier"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:barrierDirection="bottom"
app:constraint_referenced_ids="title_text_view,pin_text_view" />
<TextView
android:id="#+id/body_text_view"
android:background="#304ffe"
android:textColor="#ffffff"
android:layout_width="0dp"
android:layout_height="0dp"
app:layout_constraintTop_toBottomOf="#+id/barrier"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintEnd_toEndOf="parent"
android:text="Body" />
</android.support.constraint.ConstraintLayout>
For further information see this link

you can get closest to your requirement using below code without adding any extra code:
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_margin="30dp"
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">
<TextView
android:id="#+id/title_text_view"
android:background="#ffd600"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:text="Title\nTitle"
android:visibility="visible"
app:layout_constraintEnd_toStartOf="#+id/pin_text_view"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:id="#+id/pin_text_view"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="8dp"
android:background="#ff0000"
android:text="Pin"
android:textColor="#ffffff"
app:layout_constraintEnd_toEndOf="#+id/body_text_view" />
<TextView
android:id="#+id/body_text_view"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_marginTop="8dp"
android:background="#304ffe"
android:text="Body"
android:textColor="#ffffff"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/pin_text_view" />
OR if you want to do some extra xml code you can do something like this using guidelines feature in constraintLayout:
<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:layout_margin="30dp">
<TextView
android:id="#+id/title_text_view"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:background="#ffd600"
android:padding="5dp"
android:text="Title\nTitle"
android:visibility="visible"
app:layout_constraintBottom_toTopOf="#+id/guideline"
app:layout_constraintEnd_toStartOf="#+id/pin_text_view"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<android.support.constraint.Guideline
android:id="#+id/guideline"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.09" />
<TextView
android:id="#+id/pin_text_view"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="8dp"
android:background="#ff0000"
android:text="Pin"
android:textColor="#ffffff"
app:layout_constraintEnd_toEndOf="#+id/body_text_view" />
<TextView
android:id="#+id/body_text_view"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_marginTop="8dp"
android:background="#304ffe"
android:text="Body"
android:textColor="#ffffff"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="#+id/guideline" />
</android.support.constraint.ConstraintLayout>

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