Develop Reference

How to align TextView in two lines between images in ConstraintLayout

I'm doing some design in constraintlayout that is give me a pain. I have an image at the left, two text in a vertical orientation that is align at the end of this image and I have other constraints at right with an image and text.
If I type a long text in the two text that i have in a vertical orientation the text cover the constraint that I have at right of my view. That I want to do is if this text is long can't cover this constraint, have to expand to other line.
This is my code:
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<androidx.appcompat.widget.AppCompatImageView
android:id="#+id/image_slider"
android:layout_width="40dp"
android:layout_height="40dp"
android:layout_margin="8dp"
android:scaleType="centerInside"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
tools:src="#drawable/ic_error" />
<TextView
android:id="#+id/txt_title_animation_native_cart"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:textColor="#color/app_primary_medium"
android:textSize="15sp"
app:layout_constraintStart_toEndOf="#+id/image_slider"
app:layout_constraintTop_toTopOf="#+id/image_slider"
tools:text="Title" />
<TextView
android:id="#+id/txt_subtitle_animation_native_cart"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="4dp"
android:maxLines="2"
android:textColor="#color/app_grey_medium"
android:textSize="12sp"
app:layout_constraintStart_toStartOf="#+id/txt_title_animation_native_cart"
app:layout_constraintTop_toBottomOf="#+id/txt_title_animation_native_cart"
tools:text="Subtitle asfda sdfowei oiwue rpoweiru oiwue twoeiu t oiweu t" />
<androidx.constraintlayout.widget.ConstraintLayout
android:id="#+id/constraint_undo_button"
android:layout_width="31dp"
android:layout_height="match_parent"
android:layout_marginEnd="24dp"
android:orientation="vertical"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toTopOf="parent">
<androidx.appcompat.widget.AppCompatImageView
android:id="#+id/image_undo"
android:layout_width="14dp"
android:layout_height="16dp"
android:src="#drawable/icon_loop"
android:visibility="gone"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
tools:src="#drawable/icon_loop"
tools:visibility="visible" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="4dp"
android:gravity="center"
android:text="Ree"
android:textColor="#color/app_primary_medium"
android:textSize="12sp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/image_undo" />
</androidx.constraintlayout.widget.ConstraintLayout>
</androidx.constraintlayout.widget.ConstraintLayout>

I recommend you use only one parent view and read about Guideline view, Constraints Chains and Barriers. So a possible solution could be the next:
And the code:
<?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="wrap_content"
android:padding="16dp">
<!-- In the parent constraint group add your custom background -->
<androidx.constraintlayout.widget.Guideline
android:id="#+id/guideline_80_percent"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
app:layout_constraintGuide_percent="0.85" />
<androidx.appcompat.widget.AppCompatImageView
android:id="#+id/image_slider"
android:layout_width="40dp"
android:layout_height="40dp"
android:src="#drawable/ic_launcher_background"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:id="#+id/txt_title_animation_native_cart"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
app:layout_constraintEnd_toEndOf="#id/guideline_80_percent"
app:layout_constraintStart_toEndOf="#id/image_slider"
app:layout_constraintTop_toTopOf="#id/image_slider"
tools:text="Title" />
<TextView
android:id="#+id/txt_subtitle_animation_native_cart"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginTop="8dp"
android:ellipsize="end"
android:maxLines="2"
app:layout_constraintBottom_toBottomOf="#id/image_slider"
app:layout_constraintEnd_toEndOf="#id/txt_title_animation_native_cart"
app:layout_constraintStart_toStartOf="#id/txt_title_animation_native_cart"
app:layout_constraintTop_toBottomOf="#id/txt_title_animation_native_cart"
tools:text="Subtitle asfda sdfowei oiwue rpoweiru oiwue twoeiu t oiweu t adfadf adflkjadfkj adlkjadflk" />
<androidx.appcompat.widget.AppCompatImageView
android:id="#+id/image_undo"
android:layout_width="16dp"
android:layout_height="16dp"
android:src="#drawable/ic_launcher_background"
app:layout_constraintBottom_toTopOf="#id/text_undo"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="#id/guideline_80_percent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_chainStyle="packed" />
<TextView
android:id="#+id/text_undo"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="#id/image_undo"
app:layout_constraintStart_toStartOf="#id/image_undo"
app:layout_constraintTop_toBottomOf="#id/image_undo"
tools:text="Ree" />
</androidx.constraintlayout.widget.ConstraintLayout>

First, you don't need two nested constraint layouts, one is enough.
Then just set the text with endToStartoOf image_undo and set the width to 0dp instead of wrap_content

Just do this:
<TextView
android:id="#+id/txt_subtitle_animation_native_cart"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginTop="4dp"
android:layout_marginEnd="4dp"
android:maxLines="2"
android:textColor="#color/app_grey_medium"
android:textSize="12sp"
app:layout_constraintStart_toStartOf="#+id/txt_title_animation_native_cart"
app:layout_constraintTop_toBottomOf="#+id/txt_title_animation_native_cart"
app:layout_constraintEnd_toStartOf="#+id/constraint_undo_button"
tools:text="Subtitle asfda sdfowei oiwue rpoweiru oiwue twoeiu t oiweu t" />

Packed chain with gravity top

I have two view that are fit at the top and bottom of the screen and I have a Recycler view that will sit between them but there is one view that much be packed with recyclview vertically. Something like this
I have to use constraint layout to achieve this. I have tried to achieve this with using packed-chain but that puts the view in center of screen not align to the the top view.

Change the bias of the chain to zero and that will position the RecyclerView and the view below it to the top of the center area. Something like this:
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="#+id/textView2"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginEnd="16dp"
android:text="Bottom View"
android:textSize="24sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toStartOf="parent" />
<TextView
android:id="#+id/textView"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginTop="16dp"
android:layout_marginEnd="16dp"
android:gravity="center"
android:text="Top"
android:textSize="24sp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/recyclerView"
android:layout_width="0dp"
android:layout_height="wrap_content"
app:layout_constrainedHeight="true"
android:layout_marginStart="16dp"
android:layout_marginTop="16dp"
android:layout_marginEnd="16dp"
android:background="#android:color/holo_green_light"
app:layout_constraintBottom_toTopOf="#+id/textView3"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/textView"
app:layout_constraintVertical_bias="0.0"
app:layout_constraintVertical_chainStyle="packed" />
<TextView
android:id="#+id/textView3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="16dp"
android:text="View"
android:textSize="24sp"
app:layout_constraintBottom_toTopOf="#+id/textView2"
app:layout_constraintStart_toStartOf="#+id/recyclerView"
app:layout_constraintTop_toBottomOf="#+id/recyclerView" />
</androidx.constraintlayout.widget.ConstraintLayout>
I think the key point here is that the top and bottom views do not have to be part of the chain.
You could also, maybe, do the same without the chain by constraining the tops of the center views.

The point is not having bottom constraints for these top, RecyclerView and tiny view.
And for your passing through problem, you can use Guideline for your RecycleView's bottom constraint.
This is an example. You should modify to fit to your actual situation. Especially about widths or heights which have px sized may be replaced with wrap_content:
<?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"
tools:context=".MainActivity">
<View
android:id="#+id/topView"
android:layout_width="0dp"
android:layout_height="120px"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/recyclerView"
android:layout_width="0dp"
android:layout_height="0dp"
app:layout_constraintBottom_toTopOf="#id/guideline"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#id/topView" />
<androidx.constraintlayout.widget.Guideline
android:id="#+id/guideline"
android:layout_width="wrap_content"
android:layout_height="0dp"
android:orientation="horizontal"
app:layout_constraintBottom_toBottomOf="#id/guideline"
app:layout_constraintGuide_begin="400dp" />
<View
android:id="#+id/tinyView"
android:layout_width="240px"
android:layout_height="120px"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#id/guideline" />
<View
android:id="#+id/bottomView"
android:layout_width="0dp"
android:layout_height="120px"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>

How do I overlap components inside a ConstraintLayout?

I am trying to overlap components inside a constraint layout. I would like to have the bottom of Team One to be on top of the vs container. I was able to align it by using the app:layout_constraintVertical_bias attribute. When the keyboard expands, the component is not responsive. It will push the Team One over the vs past the point of being flush with top of the vs container.
<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/team_divider_layout"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:id="#+id/team_one_name_container"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:maxWidth="200dp"
android:elevation="2dp"
app:layout_constraintEnd_toStartOf="#id/team_two_name"
app:layout_constraintHorizontal_bias=".3"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintBottom_toTopOf="#id/select_teams_container">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_gravity="center|end"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<com.google.android.material.textfield.TextInputEditText
android:layout_gravity="center|start"
android:id="#+id/team_one_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#null"
android:focusedByDefault="false"
android:cursorVisible="true"
android:minWidth="100dp"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintEnd_toStartOf="#id/color_picker_circle"
android:textCursorDrawable="#null"
android:text="#string/start_game"
android:inputType="textCapCharacters|textNoSuggestions"
android:textAppearance="#style/TextAppearance.MyTheme.Headline1"/>
<com.madrapps.pikolo.HSLColorPicker
android:id="#+id/team_one_color_picker"
android:layout_width="200dp"
android:layout_height="200dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintHorizontal_bias=".75"
app:layout_constraintStart_toEndOf="#id/team_one_name"
app:layout_constraintTop_toTopOf="parent" />
<com.google.android.material.card.MaterialCardView
android:id="#+id/color_picker_circle"
android:layout_width="50dp"
android:layout_height="50dp"
android:clickable="true"
android:focusable="true"
app:cardElevation="2dp"
app:cardBackgroundColor="#color/color_primary"
app:layout_constraintStart_toEndOf="#id/team_one_name"
app:layout_constraintEnd_toEndOf="#id/team_one_color_picker"
app:layout_constraintBottom_toBottomOf="#id/team_one_name"
app:layout_constraintTop_toTopOf="#id/team_one_name"
app:shapeAppearance="#style/ShapeAppearanceOverlay.MyApp.MaterialCardView.Circle"/>
<ImageButton
android:id="#+id/confirm_team_one_color_btn"
android:layout_width="60dp"
android:layout_height="60dp"
android:background="#drawable/ic_check_circle_black_48dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toEndOf="#id/team_one_color_picker"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias=".25"/>
</androidx.constraintlayout.widget.ConstraintLayout>
</LinearLayout>
<com.google.android.material.textfield.TextInputEditText
android:id="#+id/team_two_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:minWidth="100dp"
android:background="#null"
android:cursorVisible="true"
android:focusedByDefault="false"
android:gravity="end"
android:inputType="textCapCharacters|textNoSuggestions"
android:textAppearance="#style/TextAppearance.MyTheme.Headline1"
android:textCursorDrawable="#null"
app:layout_constraintBottom_toTopOf="#id/select_teams_container"
app:layout_constraintEnd_toEndOf="#id/select_teams_container"
app:layout_constraintWidth_percent=".25" />
<com.google.android.material.card.MaterialCardView
android:id="#+id/select_teams_container"
android:layout_width="0dp"
android:layout_height="0dp"
app:strokeWidth="2dp"
app:strokeColor="#color/color_primary"
app:shapeAppearance="#style/ShapeAppearance.MaterialComponents.MediumComponent.TeamSelectCard"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintWidth_percent=".6"
app:layout_constraintHeight_percent=".55">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<androidx.constraintlayout.widget.ConstraintLayout
android:id="#+id/team_one_container"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_gravity="center"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toStartOf="#id/team_two_container"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.0">
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/team_one_recyclerView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:nestedScrollingEnabled="false"
android:orientation="vertical"
android:overScrollMode="never"
android:weightSum="5"
app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
tools:itemCount="5"
tools:listitem="#layout/playercard_draggable" />
</androidx.constraintlayout.widget.ConstraintLayout>
<TextView
android:id="#+id/vertical_divider"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="VS"
style="#style/TextAppearance.MyTheme.Headline1"
app:layout_constraintStart_toEndOf="#id/team_one_container"
app:layout_constraintEnd_toStartOf="#id/team_two_container"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintTop_toTopOf="parent"/>
<androidx.constraintlayout.widget.ConstraintLayout
android:id="#+id/team_two_container"
android:layout_width="0dp"
android:layout_height="0dp"
app:layout_constraintStart_toEndOf="#id/team_one_container"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintBottom_toBottomOf="parent">
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/team_two_recyclerView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
android:weightSum="5"
android:overScrollMode="never"
app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
tools:itemCount="5"
tools:listitem="#layout/playercard_draggable" />
</androidx.constraintlayout.widget.ConstraintLayout>
</androidx.constraintlayout.widget.ConstraintLayout>
</androidx.constraintlayout.widget.ConstraintLayout>
When I don't use vertical bias:
When I use vertical bias:
When the keyboard is expanded:

I cant do simple comments on the initial post yet.
But it look as if your team_one_color_picker view has a set height of 200, which is making the parent view not fit in the available screen correctly. Try changing that height param to be something dynamic
Also your team_one_name_container object can be a height of 0dp since it is constrained at the top and bottom.

First, set android:windowSoftInputMode="adjustNotjing" in the manifest file or through the Java code, so that your view does not change when the keyboard is in open or closed state, and then you can use translationY=-10dp or any particular dp depending on your need for Team1 to move it on to the top of vs container.

How to move LayoutBackground behind an ImageView

I tried to add on the top right corner of my app a notificationBar which shows how many msgs are in the inbox.
Later on I want to add a custom drawable to my background, for now I added only a black color as bg to reach my goal, as you can see on the left side of my image: This is a TextView constraint to the END of my ImageView. I want my Background to go behind the imageview BUT not to go outside of its dimensions neither to start before the imageview (you would see the top left and bottom right corner of the textview - rectangle
I'm stuck on that with the following Code:
<androidx.constraintlayout.widget.ConstraintLayout
android:id="#+id/msg_bar"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintEnd_toEndOf="parent"
>
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#color/black"
app:layout_constraintStart_toEndOf="#+id/imageView"
>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="0 MSGs"
android:textColor="#color/white"
android:paddingStart="#dimen/default_padding"
android:padding="#dimen/small_padding"
/>
</androidx.constraintlayout.widget.ConstraintLayout>
<ImageView
android:id="#+id/imageView"
android:layout_width="46dp"
android:layout_height="0dp"
app:layout_constraintDimensionRatio="W, 1:1"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintBottom_toBottomOf="parent"
android:background="#drawable/ic_contact"/>
</androidx.constraintlayout.widget.ConstraintLayout>
How can I fix this?

If no other view is constrained to the TextView you can simply apply a negative "x" translation to the TextView: android:translationX="-15dp". I chose -15dp but it could be another negative value that works for your layout.
<androidx.constraintlayout.widget.ConstraintLayout
android:id="#+id/msg_bar"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toTopOf="parent">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#android:color/black"
android:padding="#dimen/small_padding"
android:paddingStart="#dimen/default_padding"
android:text="0 MSGs"
android:textColor="#color/white"
android:translationX="-15dp"
app:layout_constraintBottom_toBottomOf="#id/imageView"
app:layout_constraintStart_toEndOf="#+id/imageView"
app:layout_constraintTop_toTopOf="#id/imageView" />
<ImageView
android:id="#+id/imageView"
android:layout_width="46dp"
android:layout_height="0dp"
android:background="#drawable/ic_contact"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintDimensionRatio="W, 1:1"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
SebastienRieu's solution should work but you may need to add a margin to the start of the TextView to hide its top-left and bottom-left corners.

change constraint of textview to start with imageView and add text alignment to textview
<androidx.constraintlayout.widget.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="#+id/msg_bar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintEnd_toEndOf="parent" >
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:background="#color/black"
app:layout_constraintStart_toStartOf="#+id/imageView"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent" >
<TextView
android:layout_width="0dp"
android:layout_height="wrap_content"
android:text="0 MSGs"
android:textColor="#color/white"
android:paddingStart="#dimen/default_padding"
android:padding="#dimen/default_padding"
android:textAlignment="textEnd"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintBottom_toBottomOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
<ImageView
android:id="#+id/imageView"
android:layout_width="46dp"
android:layout_height="0dp"
app:layout_constraintDimensionRatio="W, 1:1"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintBottom_toBottomOf="parent"
android:background="#drawable/ic_contact" />
</androidx.constraintlayout.widget.ConstraintLayout>

Constraint layout works as a frame layout. For such designs, we can use guidelines. Guidelines work greats for such a view .
I have made a few changes in your layout, I hope this can be helpful.
<?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:id="#+id/msg_bar"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#android:color/darker_gray"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toTopOf="parent">
<TextView
android:id="#+id/text_msg_count"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#color/black_primary"
android:paddingStart="#dimen/space_28"
android:text="0 MSGs"
android:textAlignment="textEnd"
android:textColor="#color/white_color"
android:layout_marginEnd="#dimen/space_28"
android:paddingEnd="10dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintBottom_toBottomOf="#id/imageView"
app:layout_constraintStart_toStartOf="#+id/guideline"
app:layout_constraintTop_toTopOf="#+id/imageView" />
<ImageView
android:id="#+id/imageView"
android:layout_width="46dp"
android:layout_height="0dp"
android:layout_margin="#dimen/space_28"
android:background="#drawable/ic_contact"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintDimensionRatio="W, 1:1"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<androidx.constraintlayout.widget.Guideline
android:id="#+id/guideline"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:orientation="vertical"
app:layout_constraintGuide_percent="0.3"
app:layout_constraintEnd_toEndOf="#id/imageView"
app:layout_constraintStart_toStartOf="#id/imageView" />
</androidx.constraintlayout.widget.ConstraintLayout>
Below link, you can use to get more info on guidelines https://constraintlayout.com/basics/guidelines.html

How to keep width/height ratio inside a LinearLayout?

I am trying to implement a layout like this:
I had added a code like below, but the problem is that the two ImageViews' heights is zero in the final rendered layout. I don't know why the app:layout_constraintDimensionRatio="1:1" (height to width ratio 1:1) has no effect? Did I missed something?
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="#+id/content"
android:layout_width="match_parent"
android:layout_height="0dp"
android:background="#drawable/orange_gradient"
app:layout_constraintDimensionRatio="1:0.5">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_constraintTop_toTopOf="parent"
android:orientation="horizontal"
android:weightSum="10">
<!-- want height to be constrained by 1:1 to width -->
<ImageView
android:id="#+id/croppedFaceImageView"
android:layout_width="0dp"
android:layout_weight="4"
android:layout_height="0dp"
app:layout_constraintDimensionRatio="1:1"
android:background="#android:color/darker_gray" />
<TextView
android:id="#+id/confidenceLabel"
android:layout_width="0dp"
android:layout_weight="2"
android:layout_height="wrap_content"
android:text="90%"
android:textAlignment="center"
android:textColor="#android:color/black"
android:textSize="8sp"
android:background="#android:color/holo_green_dark" />
<ImageView
android:id="#+id/avartarImageView"
android:layout_width="0dp"
android:layout_weight="4"
android:layout_height="0dp"
app:layout_constraintDimensionRatio="1:1"
android:background="#android:color/holo_orange_dark" />
</LinearLayout>
</android.support.constraint.ConstraintLayout>

You can only use app:layout_constraintDimensionRatio in a ConstraintLayout.
However, there is a way to achieve what you're looking for.
Replace the LinearLayout with ConstraintLayout and follow the following code template on your xml design
NB. Notice that the trick to have the child views line out properly is using constraint rules against each child.
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<TextView
android:id="#+id/sun"
android:layout_width="0dp"
android:layout_height="wrap_content"
app:layout_constraintDimensionRatio="1:1"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toStartOf="#id/mon"
android:text="S"/>
<TextView
android:id="#+id/mon"
android:layout_width="0dp"
android:layout_height="wrap_content"
app:layout_constraintDimensionRatio="1:1"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintStart_toEndOf="#id/sun"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toStartOf="#id/tue"
android:text="M"/>
<TextView
android:id="#+id/tue"
android:layout_width="0dp"
android:layout_height="wrap_content"
app:layout_constraintDimensionRatio="1:1"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintStart_toEndOf="#id/mon"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toStartOf="#id/wed"
android:text="T"/>
<TextView
android:id="#+id/wed"
android:layout_width="0dp"
android:layout_height="wrap_content"
app:layout_constraintDimensionRatio="1:1"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintStart_toEndOf="#id/tue"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toStartOf="#id/thur"
android:text="W"/>
<TextView
android:id="#+id/thur"
android:layout_width="0dp"
android:layout_height="wrap_content"
app:layout_constraintDimensionRatio="1:1"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintStart_toEndOf="#id/wed"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toStartOf="#id/fri"
android:text="T"/>
<TextView
android:id="#+id/fri"
android:layout_width="0dp"
android:layout_height="wrap_content"
app:layout_constraintDimensionRatio="1:1"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintStart_toEndOf="#id/thur"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toStartOf="#id/sat"
android:text="F"/>
<TextView
android:id="#+id/sat"
android:layout_width="0dp"
android:layout_height="wrap_content"
app:layout_constraintDimensionRatio="1:1"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintStart_toEndOf="#id/fri"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
android:text="S"/>
</androidx.constraintlayout.widget.ConstraintLayout>
The above code will create something like: