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how can I put empty space between password and register button in my constrainlayout

I am developing android app and I have implemented constrainlayout but in real device password edit text and register button overlapping to each other I want to empty space between them how can achieve that
below my currentlayout
<?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"
android:background="#color/white">
<androidx.constraintlayout.widget.ConstraintLayout
android:id="#+id/constraintLayout"
android:layout_width="100dp"
android:layout_height="100dp"
android:layout_marginTop="100dp"
android:background="#drawable/circle_back"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:srcCompat="#drawable/ic_person">
<ImageView
android:id="#+id/person_icon"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:contentDescription="#string/empty"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:srcCompat="#drawable/ic_person" />
</androidx.constraintlayout.widget.ConstraintLayout>
<EditText
android:id="#+id/name"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginTop="40dp"
android:layout_marginEnd="16dp"
android:hint="#string/firstname"
style="#style/textFieldStyle"
android:inputType="textEmailAddress"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/constraintLayout"
tools:ignore="RtlSymmetry"
android:autofillHints="" />
<EditText
android:id="#+id/email"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginTop="16dp"
style="#style/textFieldStyle"
android:hint="#string/email"
android:inputType="textEmailAddress"
app:layout_constraintEnd_toEndOf="#+id/name"
app:layout_constraintStart_toStartOf="#+id/name"
app:layout_constraintTop_toBottomOf="#+id/lastName"
tools:ignore="TextFields" />
<Button
android:id="#+id/registration"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginBottom="40dp"
android:backgroundTint="#color/gray"
android:fontFamily="#font/roboto_black"
android:padding="16dp"
android:text="#string/register"
app:layout_constraintBottom_toTopOf="#+id/already_have_account"
app:layout_constraintEnd_toEndOf="#+id/password"
app:layout_constraintStart_toStartOf="parent" />
<TextView
android:id="#+id/already_have_account"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="32dp"
android:text="#string/already_have_an_account"
android:textColor="#color/primaryBlack"
android:textSize="12sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.33"
app:layout_constraintStart_toStartOf="parent" />
<TextView
android:id="#+id/login"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="32dp"
android:text="#string/login"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.73"
app:layout_constraintStart_toStartOf="parent" />
<EditText
android:id="#+id/password"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginTop="16dp"
android:layout_marginBottom="16dp"
android:hint="#string/password"
android:inputType="textPassword"
style="#style/textFieldStyle"
app:layout_constraintEnd_toEndOf="#+id/email"
app:layout_constraintStart_toStartOf="#+id/email"
app:layout_constraintTop_toBottomOf="#+id/email" />
<EditText
android:id="#+id/lastName"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginTop="16dp"
style="#style/textFieldStyle"
android:hint="#string/lastName"
android:inputType="textPersonName"
app:layout_constraintEnd_toEndOf="#+id/name"
app:layout_constraintStart_toStartOf="#+id/name"
app:layout_constraintTop_toBottomOf="#+id/name" />
</androidx.constraintlayout.widget.ConstraintLayout>
following screenshot in real device I want to know what I have to do in order to put space between password and register button
but I want to see in real device as if you see there space between password and register button

Add a constraint from the top of the register button to the bottom of the password field. Every element should have a top and bottom constraint to not overlap another element that is above or below it.

When you do something like android:layout_marginBottom="40dp", you will eventually get some views overlapping and that's because you are using hardcoded values, you want to adjust your views to the size of your screen in a responsive way.
You can do it using Guidelines, app:layout_constraintHeight_percent="0.xx" and chain verticly your views:
Inside you constarintLayout (I have used a single layout)
<ImageView
android:id="#+id/imageView"
android:layout_width="0dp"
android:layout_height="0dp"
app:layout_constraintBottom_toTopOf="#+id/editTextTextPersonName"
app:layout_constraintDimensionRatio="1:1"
app:layout_constraintEnd_toStartOf="#+id/guideline4"
app:layout_constraintHeight_percent="0.25"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toStartOf="#+id/guideline3"
app:layout_constraintTop_toTopOf="parent"
tools:srcCompat="#tools:sample/backgrounds/scenic" />
<EditText
android:id="#+id/editTextTextPersonName"
android:layout_width="0dp"
android:layout_height="0dp"
app:layout_constraintHeight_percent="0.07"
android:ems="10"
android:inputType="textPersonName"
android:text="FirstName"
app:layout_constraintBottom_toTopOf="#+id/editTextTextPersonName2"
app:layout_constraintEnd_toStartOf="#+id/guideline4"
app:layout_constraintStart_toStartOf="#+id/guideline3"
app:layout_constraintTop_toBottomOf="#+id/imageView" />
<EditText
android:id="#+id/editTextTextPersonName2"
android:layout_width="0dp"
android:layout_height="0dp"
app:layout_constraintHeight_percent="0.07"
android:ems="10"
android:inputType="textPersonName"
android:text="LastName"
app:layout_constraintBottom_toTopOf="#+id/editTextTextPersonName3"
app:layout_constraintEnd_toEndOf="#+id/editTextTextPersonName"
app:layout_constraintStart_toStartOf="#+id/editTextTextPersonName"
app:layout_constraintTop_toBottomOf="#+id/editTextTextPersonName" />
<EditText
android:id="#+id/editTextTextPersonName3"
android:layout_width="0dp"
android:layout_height="0dp"
app:layout_constraintHeight_percent="0.07"
android:ems="10"
android:inputType="textPersonName"
android:text="Email"
app:layout_constraintBottom_toTopOf="#+id/editTextTextPersonName4"
app:layout_constraintEnd_toEndOf="#+id/editTextTextPersonName"
app:layout_constraintStart_toStartOf="#+id/editTextTextPersonName"
app:layout_constraintTop_toBottomOf="#+id/editTextTextPersonName2" />
<EditText
android:id="#+id/editTextTextPersonName4"
android:layout_width="0dp"
android:layout_height="0dp"
app:layout_constraintHeight_percent="0.07"
android:ems="10"
android:inputType="textPersonName"
android:text="Password"
app:layout_constraintBottom_toTopOf="#+id/button"
app:layout_constraintEnd_toEndOf="#+id/editTextTextPersonName"
app:layout_constraintStart_toStartOf="#+id/editTextTextPersonName"
app:layout_constraintTop_toBottomOf="#+id/editTextTextPersonName3" />
<Button
android:id="#+id/button"
android:layout_width="0dp"
android:layout_height="0dp"
app:layout_constraintHeight_percent="0.07"
android:text="Register"
app:layout_constraintBottom_toTopOf="#+id/guideline2"
app:layout_constraintEnd_toEndOf="#+id/editTextTextPersonName4"
app:layout_constraintStart_toStartOf="#+id/editTextTextPersonName4"
app:layout_constraintTop_toBottomOf="#+id/editTextTextPersonName4" />
<androidx.constraintlayout.widget.Guideline
android:id="#+id/guideline2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.85" />
<TextView
android:id="#+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Already have account?"
app:layout_constraintBottom_toBottomOf="#+id/textView2"
app:layout_constraintEnd_toStartOf="#+id/textView2"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="#+id/textView2" />
<TextView
android:id="#+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Log in"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toEndOf="#+id/textView"
app:layout_constraintTop_toTopOf="#+id/guideline2" />
<androidx.constraintlayout.widget.Guideline
android:id="#+id/guideline3"
android:layout_width="wrap_content"
app:layout_constraintGuide_percent="0.05"
android:layout_height="wrap_content"
android:orientation="vertical" />
<androidx.constraintlayout.widget.Guideline
android:id="#+id/guideline4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:layout_constraintGuide_percent="0.95"
android:orientation="vertical" />
It will look like this (arrows pointing to the guidelines):

Adding app:layout_constraintTop_toBottomOf.
<Button
android:id="#+id/registration"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginBottom="40dp"
android:backgroundTint="#color/gray"
android:fontFamily="#font/roboto_black"
android:padding="16dp"
android:text="#string/register"
app:layout_constraintBottom_toTopOf="#+id/already_have_account"
app:layout_constraintEnd_toEndOf="#+id/password"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#id/password" />
Adding app:layout_constraintBottom_toTopOf="#id/registration"
<EditText
android:id="#+id/password"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginTop="16dp"
android:layout_marginBottom="16dp"
android:hint="#string/password"
android:inputType="textPassword"
style="#style/textFieldStyle"
app:layout_constraintEnd_toEndOf="#+id/email"
app:layout_constraintStart_toStartOf="#+id/email"
app:layout_constraintTop_toBottomOf="#+id/email"
app:layout_constraintBottom_toTopOf="#id/registration" />
The above solution works only when all of your views are within a single screen. If height of the View is bigger than the screen, then you may need ScrollView or other method.
<?xml version="1.0" encoding="utf-8"?>
<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">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#color/white">
... your main content here ...
</androidx.constraintlayout.widget.ConstraintLayout>
</LinearLayout>
</ScrollView>
Adding ScrollView and LinearLayout outside your main content ConstraintLayout solves the overlapping issue, and allow bigger view to scroll on smaller view.

Try increasing the margin_botton of the password field and also decreasing margin_botton of the Button.

The Problem is that your register button is bottom aligned, while the above elements are top aligned, which means they will overlap on smaller screens.
Try updating your Register button in the following way to enforce a minimum top margin with the password field if there is too little space (I just added a constraint to the password field, set constraintVerticalbias to 1.0 and set a topMargin):
<Button
android:id="#+id/registration"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginTop="ENTER YOUR TOP MARGIN HERE"
android:layout_marginBottom="40dp"
android:backgroundTint="#color/gray"
android:fontFamily="#font/roboto_black"
android:padding="16dp"
android:text="#string/register"
app:layout_constraintBottom_toTopOf="#+id/already_have_account"
app:layout_constraintEnd_toEndOf="#+id/password"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/password"
app:layout_constraintVertical_bias="1.0" />
IMPORTANT: To make this work you need to wrap your screen in a Scrollview with android:fillViewport="true".
Here would be your whole layout reworked so that it should work (with registerbutton minimum top margin of 40dp):
<?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:background="#color/white">
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fillViewport="true">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<LinearLayout
android:id="#+id/constraintLayout"
android:layout_width="100dp"
android:layout_height="100dp"
android:layout_marginTop="100dp"
android:background="#drawable/circle_back"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:srcCompat="#drawable/ic_person">
<ImageView
android:id="#+id/person_icon"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:contentDescription="#string/empty"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:srcCompat="#drawable/ic_person" />
</LinearLayout>
<EditText
android:id="#+id/name"
style="#style/textFieldStyle"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginTop="40dp"
android:layout_marginEnd="16dp"
android:autofillHints=""
android:hint="#string/firstname"
android:inputType="textEmailAddress"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/constraintLayout"
tools:ignore="RtlSymmetry" />
<EditText
android:id="#+id/email"
style="#style/textFieldStyle"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginTop="16dp"
android:hint="#string/email"
android:inputType="textEmailAddress"
app:layout_constraintEnd_toEndOf="#+id/name"
app:layout_constraintStart_toStartOf="#+id/name"
app:layout_constraintTop_toBottomOf="#+id/lastName"
tools:ignore="TextFields" />
<Button
android:id="#+id/registration"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginTop="40dp"
android:layout_marginBottom="40dp"
android:backgroundTint="#color/gray"
android:fontFamily="#font/roboto_black"
android:padding="16dp"
android:text="#string/register"
app:layout_constraintBottom_toTopOf="#+id/already_have_account"
app:layout_constraintEnd_toEndOf="#+id/password"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/password"
app:layout_constraintVertical_bias="1.0" />
<TextView
android:id="#+id/already_have_account"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="32dp"
android:text="#string/already_have_an_account"
android:textColor="#color/primaryBlack"
android:textSize="12sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.33"
app:layout_constraintStart_toStartOf="parent" />
<TextView
android:id="#+id/login"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="32dp"
android:text="#string/login"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.73"
app:layout_constraintStart_toStartOf="parent" />
<EditText
android:id="#+id/password"
style="#style/textFieldStyle"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginTop="16dp"
android:hint="#string/password"
android:inputType="textPassword"
app:layout_constraintEnd_toEndOf="#+id/email"
app:layout_constraintStart_toStartOf="#+id/email"
app:layout_constraintTop_toBottomOf="#+id/email" />
<EditText
android:id="#+id/lastName"
style="#style/textFieldStyle"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginTop="16dp"
android:hint="#string/lastName"
android:inputType="textPersonName"
app:layout_constraintEnd_toEndOf="#+id/name"
app:layout_constraintStart_toStartOf="#+id/name"
app:layout_constraintTop_toBottomOf="#+id/name" />
</androidx.constraintlayout.widget.ConstraintLayout>
</ScrollView>
</LinearLayout>

Soft Keyboard covering buttons

I know this question has been asked a hundred times, but none of the other questions here on stack overflow have resolved my issue. In my layout, when a user types in the field to enter their age, and height the keyboard covers both buttons. I am using a constraint layout, and nothing has worked for me.
I have tried
android:windowSoftInputMode="stateVisible|adjustResize" in the android manifest
getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_ADJUST_PAN and getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_ADJUST_RESIZE
android:windowSoftInputMode="adjustResize
Nothing works. Appreciate any help here. Here is my main activity if that helps
<?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"
android:fitsSystemWindows="true">
<TextView
android:id="#+id/appTitle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="16dp"
android:text="#string/appTitle"
android:textColor="#color/colorPrimary"
android:textSize="30sp"
android:textStyle="bold"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<EditText
android:id="#+id/bodyWeight"
android:layout_width="330dp"
android:layout_height="wrap_content"
android:layout_marginTop="22dp"
android:ems="10"
android:hint="#string/bodyWeight"
android:inputType="number"
android:textColor="#color/colorPrimary"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/appTitle" />
<TextView
android:id="#+id/activitySelection"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="28dp"
android:text="#string/activitySelection"
android:textSize="18sp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/bodyWeight" />
<Spinner
android:id="#+id/activityLevel"
android:layout_width="368dp"
android:layout_height="wrap_content"
android:layout_marginTop="28dp"
android:entries="#array/activityLevel"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/activitySelection" />
<Button
android:id="#+id/loseButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="180dp"
android:text="#string/lossButton"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.503"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/activityLevel" />
<Button
android:id="#+id/gainButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="4dp"
android:text="#string/gainButton"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/loseButton" />
<EditText
android:id="#+id/inchHeight"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="27dp"
android:ems="10"
android:hint="#string/inchHeight"
android:inputType="number"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/activityLevel" />
<EditText
android:id="#+id/yearsOld"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="29dp"
android:ems="10"
android:hint="#string/YearsOld"
android:inputType="number"
app:layout_constraintBottom_toTopOf="#+id/loseButton"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toStartOf="parent" />
</android.support.constraint.ConstraintLayout>

It seems that your buttons don't have a bottom constraint? You might want to add a bottom constraint to the parent :
<Button
android:id="#+id/loseButton"
...
app:layout_constraintBottom_toBottomOf="parent" />
Also use the following in your manifest:
android:windowSoftInputMode="adjustResize">
With those changes, when opening the keyboard, the loseButton should move above the keyboard.

ConstraintLayout is not responsive

I have built a layout using ConstraintLayout for my android application. The application will be only available on mobile (no TV or Tablets). But honestly I don't how to make the layout perfectly fit the phone size.
Here's one of my activity
<?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"
android:background="#color/colorPrimary"
tools:context=".MainActivity">
<TextView
android:id="#+id/textView"
android:layout_width="match_parent"
android:layout_height="75dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:layout_marginEnd="8dp"
android:layout_marginBottom="8dp"
android:fontFamily="#font/billabong"
android:gravity="center"
android:text="Applikáció"
android:textColor="#color/white"
android:textSize="65sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.054" />
<android.support.design.widget.TextInputLayout
android:id="#+id/inputLayoutEmail"
android:layout_width="300dp"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:layout_marginEnd="8dp"
android:layout_marginBottom="8dp"
android:textColorHint="#color/inputText"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.505"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/textView"
app:layout_constraintVertical_bias="0.255">
<android.support.design.widget.TextInputEditText
android:id="#+id/login_email"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:backgroundTint="#color/inputText"
android:hint="E-mail cim"
android:inputType="text"
android:textColor="#color/colorAccent"
android:textColorHint="#color/colorPrimaryLight"
tools:layout_editor_absoluteX="16dp"
tools:layout_editor_absoluteY="214dp" />
</android.support.design.widget.TextInputLayout>
<android.support.design.widget.TextInputLayout
android:id="#+id/inputLayoutPassword"
android:layout_width="300dp"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginTop="16dp"
android:layout_marginEnd="8dp"
android:layout_marginBottom="8dp"
android:textColorHint="#color/inputText"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/inputLayoutEmail"
app:layout_constraintVertical_bias="0.0">
<android.support.design.widget.TextInputEditText
android:id="#+id/login_password"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:backgroundTint="#color/inputText"
android:textColor="#color/colorAccent"
android:hint="Jelszó"
android:inputType="textPassword"
android:textColorHint="#color/colorPrimaryLight" />
</android.support.design.widget.TextInputLayout>
<CheckBox
android:id="#+id/checkBox"
android:layout_width="300dp"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginTop="21dp"
android:layout_marginEnd="8dp"
android:layout_marginBottom="8dp"
android:buttonTint="#color/colorAccent"
android:hint="Maradjak bejelentkezve"
android:textColorHint="#color/inputText"
android:textSize="14sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/inputLayoutPassword"
app:layout_constraintVertical_bias="0.0" />
<Button
android:id="#+id/login_button"
android:layout_width="300dp"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginTop="28dp"
android:layout_marginEnd="8dp"
android:layout_marginBottom="8dp"
android:background="#drawable/button_style_1"
android:onClick="onClickButtonMain"
android:text="Bejelentkezés"
android:textColor="#color/white"
android:textStyle="bold"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/checkBox"
app:layout_constraintVertical_bias="0.0" />
<Button
android:id="#+id/registration_button"
android:layout_width="300dp"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginTop="18dp"
android:layout_marginEnd="8dp"
android:layout_marginBottom="8dp"
android:background="#drawable/button_style_blue"
android:onClick="onClickButtonMain"
android:text="Regisztráció"
android:textColor="#color/white"
android:textStyle="bold"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.494"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/login_button"
app:layout_constraintVertical_bias="0.0" />
<Button
android:id="#+id/information_button"
android:layout_width="300dp"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:layout_marginEnd="8dp"
android:layout_marginBottom="8dp"
android:background="#drawable/button_style_2"
android:onClick="onClickButtonMain"
android:text="Lépések"
android:textColor="#color/colorAccent"
android:textStyle="bold"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.505"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/registration_button"
app:layout_constraintVertical_bias="0.612" />
</android.support.constraint.ConstraintLayout>
This layout looks great on Pixel but for example on Nexus S the buttons and margins like they don't actually care about how I defined them. I really would like to know what am I doing wrong. I would like to be able to build responsive layouts.

In Android, you need to consider the number of different screen sizes when developing an android application.
Different phones got different screen size, in your layout you are using fixed size on your view (fixed size is android:layout_width="300dp" for example) and the result is that what may look good on one screen (your android studio preview screen)but will not look good on another screen (your actual phone).
For your case, I recommend using Chains and Guildelines, this will make your layout responsive.
Here is an example of the layout that you want to achieve using ConstraintLayout:
<?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/textView"
android:layout_width="match_parent"
android:layout_height="75dp"
android:layout_marginTop="8dp"
android:layout_marginBottom="8dp"
android:gravity="center"
android:text="Applikáció"
android:textSize="65sp"
app:layout_constraintBottom_toTopOf="#+id/guideline6"
app:layout_constraintTop_toTopOf="parent"
tools:layout_editor_absoluteX="0dp" />
<android.support.design.widget.TextInputLayout
android:id="#+id/inputLayoutEmail"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:textColorHint="#color/inputText"
app:layout_constraintBottom_toTopOf="#+id/inputLayoutPassword"
app:layout_constraintEnd_toStartOf="#+id/guideline7"
app:layout_constraintStart_toStartOf="#+id/guideline8"
app:layout_constraintTop_toTopOf="#+id/guideline6">
<android.support.design.widget.TextInputEditText
android:id="#+id/login_email"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:backgroundTint="#color/inputText"
android:hint="E-mail cim"
android:inputType="text"
android:textColor="#color/colorAccent"
android:textColorHint="#color/colorPrimaryLight" />
</android.support.design.widget.TextInputLayout>
<android.support.design.widget.TextInputLayout
android:id="#+id/inputLayoutPassword"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:textColorHint="#color/inputText"
app:layout_constraintBottom_toTopOf="#+id/checkBox"
app:layout_constraintEnd_toEndOf="#+id/inputLayoutEmail"
app:layout_constraintStart_toStartOf="#+id/inputLayoutEmail"
app:layout_constraintTop_toBottomOf="#+id/inputLayoutEmail">
<android.support.design.widget.TextInputEditText
android:id="#+id/login_password"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:backgroundTint="#color/inputText"
android:hint="Jelszó"
android:inputType="textPassword"
android:textColor="#color/colorAccent"
android:textColorHint="#color/colorPrimaryLight" />
</android.support.design.widget.TextInputLayout>
<CheckBox
android:id="#+id/checkBox"
android:layout_width="300dp"
android:layout_height="wrap_content"
android:buttonTint="#color/colorAccent"
android:hint="Maradjak bejelentkezve"
android:textSize="14sp"
app:layout_constraintBottom_toTopOf="#+id/login_button"
app:layout_constraintEnd_toEndOf="#+id/inputLayoutEmail"
app:layout_constraintStart_toStartOf="#+id/inputLayoutEmail"
app:layout_constraintTop_toBottomOf="#+id/inputLayoutPassword" />
<Button
android:id="#+id/login_button"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:onClick="onClickButtonMain"
android:text="Bejelentkezés"
android:textStyle="bold"
app:layout_constraintBottom_toTopOf="#+id/registration_button"
app:layout_constraintEnd_toStartOf="#+id/guideline7"
app:layout_constraintStart_toStartOf="#+id/inputLayoutEmail"
app:layout_constraintTop_toBottomOf="#+id/checkBox" />
<Button
android:id="#+id/registration_button"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:onClick="onClickButtonMain"
android:text="Regisztráció"
android:textStyle="bold"
app:layout_constraintBottom_toTopOf="#+id/information_button"
app:layout_constraintEnd_toStartOf="#+id/guideline7"
app:layout_constraintStart_toStartOf="#+id/inputLayoutEmail"
app:layout_constraintTop_toBottomOf="#+id/login_button" />
<Button
android:id="#+id/information_button"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:onClick="onClickButtonMain"
android:text="Lépések"
android:textColor="#color/colorAccent"
android:textStyle="bold"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="#+id/inputLayoutEmail"
app:layout_constraintStart_toStartOf="#+id/inputLayoutEmail"
app:layout_constraintTop_toBottomOf="#+id/registration_button" />
<android.support.constraint.Guideline
android:id="#+id/guideline6"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_begin="20dp"
app:layout_constraintGuide_percent="0.25" />
<android.support.constraint.Guideline
android:id="#+id/guideline7"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
app:layout_constraintGuide_percent=".9" />
<android.support.constraint.Guideline
android:id="#+id/guideline8"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
app:layout_constraintGuide_percent=".1" />
</android.support.constraint.ConstraintLayout>
It will look like this (I am adding a picture from the layout editor so you can see the guidelines):
Now all that left to do is to style your views and you have your layout ready.

ScrollView doesn't entirely scroll with Constraint Layout

I have an app that displays long strings of text with the press of some buttons, the problem comes when I display a lot of text and the ScrollView just stops scrolling for some reason.
Here is the xml of my app:
<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">
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent">
<TextView
android:id="#+id/textView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:layout_marginEnd="14dp"
android:layout_marginStart="16dp"
android:layout_marginTop="128dp"
android:text=""
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintEnd_toStartOf="#+id/atbutt"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.089" />
</ScrollView>
<Button
android:id="#+id/namebutt"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginEnd="12dp"
android:layout_marginStart="16dp"
android:layout_marginTop="16dp"
android:onClick="changename"
android:text="Name"
app:layout_constraintEnd_toStartOf="#+id/titlebutt"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<Button
android:id="#+id/titlebutt"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginEnd="16dp"
android:layout_marginTop="16dp"
android:onClick="changetitle"
android:text="Title"
app:layout_constraintEnd_toStartOf="#+id/descbutt"
app:layout_constraintStart_toEndOf="#+id/namebutt"
app:layout_constraintTop_toTopOf="parent" />
<Button
android:id="#+id/descbutt"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginEnd="16dp"
android:layout_marginTop="16dp"
android:onClick="changedesc"
android:text="Description"
android:textSize="13dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toEndOf="#+id/titlebutt"
app:layout_constraintTop_toTopOf="parent" />
<Button
android:id="#+id/urlbutt"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginEnd="11dp"
android:layout_marginStart="16dp"
android:layout_marginTop="20dp"
android:onClick="changeurl"
android:text="Url"
app:layout_constraintEnd_toStartOf="#+id/atbutt"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/namebutt" />
<Button
android:id="#+id/atbutt"
android:layout_width="0dp"
android:layout_height="48dp"
android:layout_marginEnd="14dp"
android:layout_marginTop="20dp"
android:onClick="changeat"
android:text="Publish Date"
android:textSize="12dp"
app:layout_constraintEnd_toStartOf="#+id/contbutt"
app:layout_constraintStart_toEndOf="#+id/urlbutt"
app:layout_constraintTop_toBottomOf="#+id/titlebutt" />
<Button
android:id="#+id/contbutt"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_marginEnd="17dp"
android:onClick="changecont"
android:text="Content"
app:layout_constraintBottom_toBottomOf="#+id/atbutt"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toEndOf="#+id/atbutt"
app:layout_constraintTop_toTopOf="#+id/atbutt"
app:layout_constraintVertical_bias="0.0" />
</android.support.constraint.ConstraintLayout>
I have seen some people use this same method that I'm using here and it works for them just fine.

Your layout has a few things that look wrong and could explain
undefined behaviour.
change the ScrollView height and width to 0dp which means to respect the constraints set on the view
<ScrollView
android:layout_width="0dp"
android:layout_height="0dp"
...
Remove the constraints from the child of the ScrollView as ContraintLayout only applies rules to direct children.
<TextView
android:id="#+id/textView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:layout_marginEnd="14dp"
android:layout_marginStart="16dp"
android:layout_marginTop="128dp"
android:text=""
/>

Constraint layout leaving space On top

I have a fragment containing a layout
<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="wrap_content"
android:fitsSystemWindows="true"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
tools:layout_editor_absoluteX="8dp"
tools:layout_editor_absoluteY="8dp"
tools:context="tech.pkg.name.fragments.ReportFragment">
<android.support.constraint.ConstraintLayout
android:id="#+id/constraintLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#color/colorPrimaryDark"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent">
<Spinner
android:id="#+id/typeSlector"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="#+id/linearLayout2" />
<android.support.constraint.ConstraintLayout
android:id="#+id/linearLayout2"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="32dp"
android:background="#drawable/android_date_bgd"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent">
<TextView
android:id="#+id/fromTextView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:layout_marginLeft="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:text="#string/from"
android:textStyle="bold"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:id="#+id/fromDateTextView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginLeft="8dp"
android:drawablePadding="5dp"
android:padding="5dp"
android:text="#string/dd_mm_yy"
android:textStyle="bold"
app:layout_constraintBaseline_toBaselineOf="#+id/fromTextView"
app:layout_constraintEnd_toStartOf="#+id/view9"
app:layout_constraintHorizontal_chainStyle="spread_inside"
app:layout_constraintStart_toEndOf="#+id/fromTextView"
app:layout_constraintTop_toTopOf="#+id/fromTextView" />
<View
android:id="#+id/view9"
android:layout_width="1dp"
android:layout_height="0dp"
android:layout_marginBottom="4dp"
android:layout_marginTop="4dp"
android:background="#android:color/black"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toStartOf="#+id/toTextView"
app:layout_constraintStart_toEndOf="#+id/fromDateTextView"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.0" />
<TextView
android:id="#+id/toTextView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/to"
android:textStyle="bold"
app:layout_constraintBaseline_toBaselineOf="#+id/fromDateTextView"
app:layout_constraintEnd_toStartOf="#+id/toDateTextView"
app:layout_constraintStart_toEndOf="#+id/view9" />
<TextView
android:id="#+id/toDateTextView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="8dp"
android:layout_marginRight="8dp"
android:drawablePadding="5dp"
android:padding="5dp"
android:text="#string/dd_mm_yy"
android:textStyle="bold"
app:layout_constraintBaseline_toBaselineOf="#+id/toTextView"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toEndOf="#+id/toTextView" />
</android.support.constraint.ConstraintLayout>
</android.support.constraint.ConstraintLayout>
<RadioGroup
android:id="#+id/radioGroup"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:orientation="horizontal"
android:padding="10dp"
android:theme="#style/AppTheme.RadioButton"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="#+id/textView8"
tools:layout_constraintLeft_creator="1"
tools:layout_constraintRight_creator="1">
<RadioButton
android:id="#+id/mobileRadioButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginLeft="20dp"
android:layout_weight="0.20"
android:checked="true"
android:text="Mobile"
android:textSize="18sp" />
<RadioButton
android:id="#+id/DTHradioButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_weight="0.14"
android:text="DTH"
android:textSize="18sp" />
</RadioGroup>
<Button
android:id="#+id/button_view_report"
android:layout_width="0dp"
android:layout_height="40dp"
android:layout_marginBottom="8dp"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:layout_marginTop="8dp"
android:background="#drawable/button_bgd"
android:text="#string/submit"
android:textColor="#color/colorAccent"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="#+id/view5"
app:layout_constraintVertical_bias="0.0" />
<View
android:id="#+id/view5"
android:layout_width="0dp"
android:layout_height="1dp"
android:layout_marginEnd="10dp"
android:layout_marginRight="15dp"
android:background="#color/colorEditTextLine"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/radioGroup" />
<CheckBox
android:id="#+id/downloadCheck"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:theme="#style/AppTheme.Checkbox"
app:layout_constraintHorizontal_bias="0.088"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="#+id/constraintLayout" />
<TextView
android:id="#+id/textView8"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:text="#string/download"
app:layout_constraintBaseline_toBaselineOf="#+id/downloadCheck"
app:layout_constraintHorizontal_bias="0.02"
app:layout_constraintLeft_toRightOf="#+id/downloadCheck"
app:layout_constraintRight_toRightOf="parent" />
</android.support.constraint.ConstraintLayout>
it is containing in
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="#+id/fragment"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />
But in the layout editor it is showing
How can I remove the spacing above?

The problem is with your Activity where you had inflated the Fragment. Actually, i tried it on My system and I'm Getting Proper result.
Check Your Activity's Layout where the FrameLayout is Used.
2nd Possbility
Check your May be Your Theme is Changing this . Check all the possibilities

Try the following code Replacing the ConstraintLayout after the Spinner
<android.support.constraint.ConstraintLayout
android:id="#+id/linearLayout2"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:background="#drawable/android_date_bgd"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent">

What happened to me was smiliar, a space on top that did not show in the editor.
The problem was not in the main layout file I was focusing on, I was displaying some fragments thru a viewpager and the margins on the editor for the pager were 0 so the editor preview did not showed a space on top. However the fragments that were being created/shown had of course a different layout file and in that layout there was a huge space on top because I erroneously thought centering the layout vertically was a good idea for some reason (mainly because I code at night before bed and sometimes im too tired lol). Since the layout height for the viewpager did not match the dimensions of the fragment I had some weird behaviors trying to position the elements of the main layout file.

I was facing a similar problem. By looking at the code snippet in the question I saw the similarity that we both have android:fitsSystemWindows set to True. By removing this android:fitsSystemWindows attribute, my space at the top was removed.