Develop Reference

Align textviews in left and right side of a linear layout?

I currently doing one of the project from "Google Android Dev". I am facing a problem in my layout design. Kindly help me how to align one textview in left side and right side of a linear layout.
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<ImageView
android:id="#+id/imageView"
android:layout_width="match_parent"
android:layout_height="194dp"
android:layout_marginBottom="8dp"
android:scaleType="centerCrop"
app:layout_constraintBottom_toTopOf="#+id/textAppearanceHeadline6"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="1.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
tools:srcCompat="#drawable/faye" />
<TextView
android:id="#+id/textAppearanceHeadline6"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:text="Faye"
android:textColor="#android:color/black"
android:textSize="16sp"
android:textStyle="bold"
app:layout_constraintStart_toStartOf="#+id/imageView"
app:layout_constraintTop_toBottomOf="#+id/imageView" />
<LinearLayout
android:id="#+id/textAppearanceBody1"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginTop="16dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="#+id/textAppearanceHeadline6"
app:layout_constraintTop_toBottomOf="#+id/textAppearanceHeadline6">
<TextView
android:id="#+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="16dp"
android:layout_marginBottom="8dp"
android:text="Age : 7"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="start|right"
android:layout_marginEnd="8dp"
android:layout_marginBottom="8dp"
android:text="Hobbies: Sunbathing"
android:textColor="#5A5656" />
</LinearLayout>
</androidx.constraintlayout.widget.ConstraintLayout>
I am new to android so you are most welcome for code review.

Try to change your layout like this:
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<ImageView
android:id="#+id/imageView"
android:layout_width="match_parent"
android:layout_height="194dp"
android:layout_marginBottom="8dp"
android:scaleType="centerCrop"
app:layout_constraintBottom_toTopOf="#+id/textAppearanceHeadline6"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="1.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
tools:srcCompat="#drawable/faye" />
<TextView
android:id="#+id/textAppearanceHeadline6"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="8dp"
android:text="Faye"
android:textColor="#android:color/black"
android:textSize="16sp"
android:textStyle="bold"
app:layout_constraintStart_toStartOf="#+id/imageView"
app:layout_constraintTop_toBottomOf="#+id/imageView" />
<LinearLayout
android:id="#+id/textAppearanceBody1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="8dp"
android:orientation="horizontal"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="#+id/textAppearanceHeadline6"
app:layout_constraintTop_toBottomOf="#+id/textAppearanceHeadline6">
<TextView
android:id="#+id/textView2"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="center|start"
android:text="Age : 7"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Hobbies: Sunbathing"
android:gravity="center"
android:textColor="#5A5656" />
</LinearLayout>
</androidx.constraintlayout.widget.ConstraintLayout>

Use it like this
<TextView
android:id="#+id/textView2"
android:layout_width="0dp"
android:layout_gravity="center_vertical"
android:weight="1"
android:layout_height="wrap_content"
android:text="Age : 7"/>
<TextView
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:text="Hobbies: Sunbathing"
android:textColor="#5A5656" />
weight here will allow the first textview to take all the space and will leave the required space for the hobby textview.
Use it as per your requirement.

Why do the buttons goes up?

So I programmed a simple app with android studio and the layout that is shown in the app when I run it is different than the xml file I designed.
Here is a link of an image of the problem.
https://imgur.com/6JIHSQ7
<?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">
<Button
android:id="#+id/subBtn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/subBtn"
android:textSize="30sp"
app:layout_constraintBaseline_toBaselineOf="#+id/addBtn"
app:layout_constraintStart_toStartOf="#+id/divBtn" />
<Button
android:id="#+id/addBtn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="36dp"
android:layout_marginLeft="36dp"
android:layout_marginBottom="42dp"
android:text="#string/addBtn"
android:textSize="30sp"
app:layout_constraintBottom_toTopOf="#+id/multBtn"
app:layout_constraintStart_toEndOf="#+id/subBtn" />
<EditText
android:id="#+id/n1EditText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="56dp"
android:ems="10"
android:hint="#string/number1"
android:inputType="textPersonName"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.444"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<EditText
android:id="#+id/n2EditText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="39dp"
android:ems="10"
android:hint="#string/number2"
android:inputType="textPersonName"
app:layout_constraintStart_toStartOf="#+id/n1EditText"
app:layout_constraintTop_toBottomOf="#+id/n1EditText" />
<Button
android:id="#+id/multBtn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="108dp"
android:layout_marginRight="108dp"
android:layout_marginBottom="336dp"
android:text="#string/multBtn"
android:textSize="30sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent" />
<Button
android:id="#+id/divBtn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="88dp"
android:layout_marginLeft="88dp"
android:layout_marginBottom="336dp"
android:text="#string/divBtn"
android:textSize="30sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="parent" />
<TextView
android:id="#+id/resultTextView"
android:layout_width="174dp"
android:layout_height="73dp"
android:layout_marginTop="8dp"
android:layout_marginBottom="8dp"
android:background="#color/colorPrimaryDark"
android:text="#string/resultView"
android:textColor="#color/colorPrimary"
android:textSize="50sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.455"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/n2EditText"
app:layout_constraintVertical_bias="0.637" />
</androidx.constraintlayout.widget.ConstraintLayout>
I think it might be related to the virtual device i'm using but I don't know if that's the problem.

The problem is, your addBtn and subBtn are not aware of the n2EditText. The addBtn depends on the divBtn and the divBtn is placed 336dp above the bottom edge of the screen.
If you need the addBtn to appear below the n2EditText then you need to add a vertical constraint connecting to the n2EditText. Once your buttons are connected to their immediate top elements, you don't need to add the bottom constraint to the bottom edge of the screen.
Imagine a ConstraintLayout as a collection of widgets hanging down from the top of the screen, each tied to the immediately top elements with the chains called "constraints". You don't need to tie the bottom widget to the ground unless it is required by design.
Here is the modified layout:
<?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">
<Button
android:id="#+id/subBtn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="-"
android:textSize="30sp"
android:layout_marginTop="16dp"
app:layout_constraintTop_toBottomOf="#+id/n2EditText"
app:layout_constraintStart_toStartOf="#+id/n2EditText"/>
<Button
android:id="#+id/addBtn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="+"
android:textSize="30sp"
app:layout_constraintStart_toEndOf="#+id/subBtn"
app:layout_constraintTop_toTopOf="#+id/subBtn"
android:layout_marginStart="16dp"/>
<EditText
android:id="#+id/n1EditText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="56dp"
android:ems="10"
android:hint="n1"
android:inputType="textPersonName"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<EditText
android:id="#+id/n2EditText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="16dp"
android:ems="10"
android:hint="n2"
android:inputType="textPersonName"
app:layout_constraintStart_toStartOf="#+id/n1EditText"
app:layout_constraintTop_toBottomOf="#+id/n1EditText"/>
<Button
android:id="#+id/multBtn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="*"
android:textSize="30sp"
app:layout_constraintStart_toEndOf="#+id/divBtn"
android:layout_marginStart="16dp"
app:layout_constraintTop_toTopOf="#+id/divBtn"/>
<Button
android:id="#+id/divBtn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="/"
android:textSize="30sp"
app:layout_constraintStart_toStartOf="#+id/subBtn"
android:layout_marginTop="8dp"
app:layout_constraintTop_toBottomOf="#+id/subBtn"/>
<TextView
android:id="#+id/resultTextView"
android:layout_width="174dp"
android:layout_height="73dp"
android:layout_marginBottom="8dp"
android:background="#color/colorPrimaryDark"
android:text="res"
android:textColor="#color/colorPrimary"
android:textSize="50sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
android:layout_marginTop="8dp" app:layout_constraintTop_toBottomOf="#+id/divBtn"/>
</androidx.constraintlayout.widget.ConstraintLayout>
Anyway, when you have a lot of widgets, you may have to use a ScrollView to accommodate them all.

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"
tools:context=".MainActivity">
<Button
android:id="#+id/subBtn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginLeft="16dp"
android:layout_marginTop="52dp"
android:layout_marginEnd="25dp"
android:layout_marginRight="25dp"
android:text="submit"
android:textSize="30sp"
app:layout_constraintEnd_toStartOf="#+id/addBtn"
app:layout_constraintHorizontal_chainStyle="packed"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/n2EditText" />
<Button
android:id="#+id/addBtn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="52dp"
android:text="add"
android:textSize="30sp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toEndOf="#+id/subBtn"
app:layout_constraintTop_toBottomOf="#+id/n2EditText" />
<EditText
android:id="#+id/n1EditText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginLeft="8dp"
android:layout_marginTop="52dp"
android:layout_marginEnd="8dp"
android:layout_marginRight="8dp"
android:ems="10"
android:hint="1"
android:inputType="textPersonName"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.439"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<EditText
android:id="#+id/n2EditText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="2dp"
android:layout_marginLeft="2dp"
android:layout_marginTop="36dp"
android:ems="10"
android:hint="2"
android:inputType="textPersonName"
app:layout_constraintStart_toStartOf="#+id/n1EditText"
app:layout_constraintTop_toBottomOf="#+id/n1EditText" />
<Button
android:id="#+id/multBtn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="44dp"
android:text="mult"
android:textSize="30sp"
app:layout_constraintStart_toEndOf="#+id/subBtn"
app:layout_constraintTop_toBottomOf="#+id/addBtn" />
<Button
android:id="#+id/divBtn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="44dp"
android:layout_marginEnd="48dp"
android:layout_marginRight="48dp"
android:text="div"
android:textSize="30sp"
app:layout_constraintEnd_toEndOf="#+id/subBtn"
app:layout_constraintTop_toBottomOf="#+id/subBtn" />
<TextView
android:id="#+id/resultTextView"
android:layout_width="174dp"
android:layout_height="73dp"
android:layout_marginStart="8dp"
android:layout_marginLeft="8dp"
android:layout_marginTop="48dp"
android:layout_marginEnd="8dp"
android:layout_marginRight="8dp"
android:background="#color/colorPrimaryDark"
android:text="resultView"
android:textColor="#color/colorPrimary"
android:textSize="50sp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.547"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/divBtn" />
</androidx.constraintlayout.widget.ConstraintLayout>

Probably on your layout editor and phone screen sizes are different. Use ConstraintLayout or some other add constraints to views

I cannot say definitly just looking at image but i think you are using facing problem because of your layout. Use LinearLayout to fix it.
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:orientation="vertical" />
<!-- EditText: number1 -->
<!-- EditText Number2 -->
<LinearLayout
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<!-- 2 Buttons here -->
<LinearLayout
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<!-- 2 Buttons here -->
</LinearLayout>
</LinearLayout>

Some general tips that can help:
Check the constraints if you're using ConstraintLayout or relatives between view if you're using RelativeLayout;
Check the values and the units of views;
Check the screen resolution of your "Preview" pane and Emulator.
If it's possible to provide some additional information about the layout that is used, if these tips didn't help.
In preview pane you can find info about resolutions here:
In the emulator pane you can simple see the sizes in the column:

Android vertical barrier is not aligning

I am having trouble to aligning TextViews and Barrier in Android. Somehow the barrier stays/stick to the left or right edge of the parent layout. See the blue and green line in image.
I want to align the barrier in the way the red line in image so it can separate left and right content.
Layout XML
<?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">
<ImageView
android:id="#+id/cover_photo"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_marginBottom="24dp"
android:scaleType="centerCrop"
android:src="#drawable/ferrari"
app:layout_constraintBottom_toBottomOf="#id/user_avatar"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="1.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.0" />
<ImageView
android:id="#+id/user_avatar"
android:layout_width="96dp"
android:layout_height="96dp"
android:layout_marginStart="16dp"
android:background="#FFFFFF"
android:padding="1dp"
android:scaleType="centerCrop"
android:src="#drawable/user_avatar"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.3" />
<TextView
android:id="#+id/username"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginTop="16dp"
android:text="Lora Mitchell's Car"
android:textColor="#000"
android:textSize="24sp"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/user_avatar" />
<TextView
android:id="#+id/manufacturer"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="16dp"
android:text="Manufacturer"
app:layout_constraintStart_toStartOf="#+id/username"
app:layout_constraintTop_toBottomOf="#+id/username" />
<TextView
android:id="#+id/model"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="8dp"
android:text="Model"
app:layout_constraintStart_toStartOf="#+id/username"
app:layout_constraintTop_toBottomOf="#+id/manufacturer" />
<TextView
android:id="#+id/type"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="8dp"
android:text="Type"
app:layout_constraintStart_toStartOf="#+id/username"
app:layout_constraintTop_toBottomOf="#+id/model" />
<TextView
android:id="#+id/bore_stroke"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="8dp"
android:text="Bore and stroke"
app:layout_constraintStart_toStartOf="#+id/username"
app:layout_constraintTop_toBottomOf="#+id/type" />
<TextView
android:id="#+id/max_power"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="8dp"
android:text="Maximum power**"
app:layout_constraintStart_toStartOf="#+id/username"
app:layout_constraintTop_toBottomOf="#+id/bore_stroke" />
<TextView
android:id="#+id/specific_power"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="8dp"
android:text="Specific power output"
app:layout_constraintStart_toStartOf="#+id/username"
app:layout_constraintTop_toBottomOf="#+id/max_power" />
<TextView
android:id="#+id/max_torque"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="8dp"
android:text="Maximum torque"
app:layout_constraintStart_toStartOf="#+id/username"
app:layout_constraintTop_toBottomOf="#+id/specific_power" />
<TextView
android:id="#+id/type_value"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="8dp"
android:text="V8 - 90°"
app:layout_constraintEnd_toEndOf="parent"
tools:layout_editor_absoluteY="351dp" />
<android.support.constraint.Barrier
android:id="#+id/barrier"
app:barrierDirection="right"
app:constraint_referenced_ids="bore_stroke,manufacturer,max_torque,model,max_power,type,specific_power" />
</android.support.constraint.ConstraintLayout>

I am not sure that barrier is the best option to separate left and right in your screen, from the documentation :
If the widgets dimensions change, the barrier will automatically move according to its direction to get the most extreme widget:
In my layouts using constraint layout when I want to separate right and left part of the screen I usually use guideline in this way :
<android.support.constraint.Guideline
android:id="#+id/guideline"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
app:layout_constraintGuide_percent="0.5" />
I constraint all of my views to the guideline and it works like charm.

Unable to make a ScrollView that contains other layouts and widgets

I am simply trying to make a scrollable layout with no luck...
I have no idea why it isn't working, it seems to be exactly as I read online.
The problem here is that the bottom of the included layout is cut of to fit exactly the screen size.
this is my layout xml:
<ScrollView 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=""
tools:layout_editor_absoluteY="81dp">
<android.support.constraint.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="#+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="4dp"
android:text="opening game"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<NumberPicker
android:id="#+id/numberPicker2"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_marginBottom="14dp"
android:layout_marginTop="8dp"
app:layout_constraintBottom_toTopOf="#+id/GameTitleET"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/textView2" />
<EditText
android:id="#+id/GameTitleET"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="153dp"
android:ems="10"
android:hint="Game's name"
android:inputType="textPersonName"
android:textSize="16sp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<EditText
android:id="#+id/GameContentET"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:hint="מהלך המשחק"
android:inputType="textMultiLine"
android:maxLines="8"
android:textSize="14sp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/DeleteAndMakeYOurOwnButton" />
<Button
android:id="#+id/DeleteAndMakeYOurOwnButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="48dp"
android:text="Write your own game"
app:layout_constraintStart_toStartOf="#+id/GameContentET"
app:layout_constraintTop_toBottomOf="#+id/numberPicker2" />
<Switch
android:id="#+id/SendToReviewSwitch"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="7dp"
android:layout_marginStart="16dp"
android:text="הגש משחק להגשה"
app:layout_constraintBottom_toTopOf="#+id/DeleteAndMakeYOurOwnButton"
app:layout_constraintStart_toStartOf="parent" />
<include
android:id="#+id/include5"
layout="#layout/activity_create_post_methods"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginTop="40dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/GameContentET" />
</android.support.constraint.ConstraintLayout></ScrollView>
Do you have any suggestion of what should i do? I also plan to add many more layouts to this main layout and I need it to scroll and show everything flawlessly.
Thank you a lot!

Unable to achieve this view in constraintLayout without adjusting dp in margin

So, the problem is that I am unable to make the Team A and Team B centrally aligned like that even after assigning a weight of 1 each to the text views. I am using constraint layout and not Linear or Relative. Also, I don't want to make those alignments for Team A and B by setting margins or like that. So if there is an appropriate attribute then please tell.
code:
<?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="com.example.pooja.courtcounter.MainActivity">
<TextView
app:layout_constraintHorizontal_weight="1"
android:id="#+id/team_nameA"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:text="Team A"
android:padding="4dp" />
<TextView
android:id="#+id/team_nameB"
app:layout_constraintHorizontal_weight="1"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:text="Team B"
android:padding="4dp"
app:layout_constraintLeft_toRightOf="#+id/team_nameA" />
<TextView
android:id="#+id/team_a_score"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="0"
android:gravity="center_horizontal"
app:layout_constraintTop_toBottomOf="#+id/team_nameA"
android:padding="4dp" />
<Button
android:id="#+id/points_3"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="+3 points"
android:background="#EEEEEE"
app:layout_constraintTop_toBottomOf="#+id/team_a_score"
android:layout_margin="8dp"
android:onClick="points3" />
<Button
android:id="#+id/points_2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="+2 points"
android:background="#EEEEEE"
app:layout_constraintTop_toBottomOf="#+id/points_3"
android:layout_margin="8dp"
android:onClick="points2" />
<Button
android:id="#+id/free_throw"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="free throw"
android:background="#EEEEEE"
app:layout_constraintTop_toBottomOf="#+id/points_2"
android:layout_margin="8dp"
android:onClick="freethrow" />
</android.support.constraint.ConstraintLayout>

You can use chain the child view in the constraint layout. I have implemented it in team name and score. You can do same for the rest.
<?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/team_nameA"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginTop="5dp"
android:padding="4dp"
android:text="Team A"
android:textAlignment="center"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintRight_toLeftOf="#+id/team_nameB"/>
<TextView
android:id="#+id/team_nameB"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginTop="5dp"
android:padding="4dp"
android:text="Team B"
android:textAlignment="center"
app:layout_constraintLeft_toRightOf="#+id/team_nameA"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"/>
<TextView
android:id="#+id/team_a_score"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginTop="7dp"
android:gravity="center_horizontal"
android:padding="4dp"
android:text="0"
app:layout_constraintHorizontal_weight="1"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toBottomOf="#+id/team_nameA"
app:layout_constraintRight_toLeftOf="#+id/team_b_score"/>
<TextView
android:id="#+id/team_b_score"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginTop="8dp"
android:gravity="center_horizontal"
android:padding="4dp"
android:text="1"
app:layout_constraintHorizontal_weight="1"
app:layout_constraintLeft_toRightOf="#+id/team_a_score"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="#+id/team_nameB"
/>
</android.support.constraint.ConstraintLayout>
If other problem arise, feel free to ask