PixelDroid-App-Android/app/src/main/res/layout/activity_profile.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.coordinatorlayout.widget.CoordinatorLayout 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=".profile.ProfileActivity">

    <com.google.android.material.appbar.AppBarLayout
        android:id="@+id/app_bar_layout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <com.google.android.material.appbar.CollapsingToolbarLayout
            android:id="@+id/collapsing_toolbar_layout"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            app:layout_scrollFlags="scroll|exitUntilCollapsed">

            <androidx.constraintlayout.widget.ConstraintLayout
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:layout_marginBottom="12dp"
                android:visibility="visible"
                app:layout_collapseMode="parallax"
                app:layout_constraintTop_toBottomOf="@id/nbFollowersTextView"
                tools:visibility="visible">

                <ImageView
                    android:id="@+id/profilePictureImageView"
                    android:layout_width="88dp"
                    android:layout_height="88dp"
                    android:layout_marginStart="20dp"
                    android:layout_marginTop="6dp"
                    android:contentDescription="@string/profile_picture"
                    app:layout_constraintStart_toStartOf="parent"
                    app:layout_constraintTop_toTopOf="parent"
                    tools:srcCompat="@tools:sample/avatars" />

                <TextView
                    android:id="@+id/nbPostsTextView"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_marginStart="20dp"
                    android:layout_marginTop="10dp"
                    android:gravity="center"
                    android:text="@string/default_nposts"
                    android:textStyle="bold"
                    app:layout_constraintStart_toStartOf="parent"
                    app:layout_constraintTop_toBottomOf="@+id/descriptionTextView" />

                <TextView
                    android:id="@+id/nbFollowersTextView"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:background="?attr/selectableItemBackgroundBorderless"
                    android:gravity="center"
                    android:text="@string/default_nfollowers"
                    android:textStyle="bold"
                    app:layout_constraintBottom_toBottomOf="@+id/nbPostsTextView"
                    app:layout_constraintEnd_toStartOf="@+id/nbFollowingTextView"
                    app:layout_constraintStart_toEndOf="@+id/nbPostsTextView"
                    app:layout_constraintTop_toTopOf="@+id/nbPostsTextView" />

                <TextView
                    android:id="@+id/nbFollowingTextView"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_marginEnd="20dp"
                    android:background="?attr/selectableItemBackgroundBorderless"
                    android:gravity="center"
                    android:text="@string/default_nfollowing"
                    android:textStyle="bold"
                    app:layout_constraintBottom_toBottomOf="@+id/nbFollowersTextView"
                    app:layout_constraintEnd_toEndOf="parent"
                    app:layout_constraintTop_toTopOf="@+id/nbFollowersTextView" />

                <TextView
                    android:id="@+id/accountNameTextView"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_marginStart="20dp"
                    android:layout_marginTop="5dp"
                    android:layout_marginEnd="20dp"
                    android:text="@string/no_username"
                    android:textStyle="bold"
                    app:layout_constraintEnd_toEndOf="parent"
                    app:layout_constraintStart_toStartOf="parent"
                    app:layout_constraintTop_toBottomOf="@id/profilePictureImageView" />

                <TextView
                    android:id="@+id/descriptionTextView"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_marginLeft="20dp"
                    android:layout_marginTop="5dp"
                    android:layout_marginRight="20dp"
                    app:layout_constraintEnd_toEndOf="parent"
                    app:layout_constraintStart_toStartOf="parent"
                    app:layout_constraintTop_toBottomOf="@id/accountNameTextView" />

                <Button
                    android:id="@+id/followButton"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_marginEnd="20dp"
                    android:text="@string/follow"
                    android:visibility="invisible"
                    app:layout_constraintBottom_toBottomOf="@+id/profilePictureImageView"
                    app:layout_constraintEnd_toEndOf="parent"
                    app:layout_constraintTop_toTopOf="@+id/profilePictureImageView" />

                <Button
                    android:id="@+id/editButton"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="@string/edit_profile"
                    android:visibility="gone"
                    app:icon="@drawable/ic_baseline_open_in_browser_24"
                    app:layout_constraintBottom_toBottomOf="@+id/profilePictureImageView"
                    app:layout_constraintEnd_toEndOf="parent"
                    app:layout_constraintStart_toEndOf="@+id/profilePictureImageView"
                    app:layout_constraintTop_toTopOf="@+id/profilePictureImageView" />

                <com.google.android.material.tabs.TabLayout
                    android:id="@+id/profileTabs"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    app:layout_constraintTop_toBottomOf="@+id/nbPostsTextView"
                    app:layout_constraintBottom_toBottomOf="parent"
                    app:layout_constraintStart_toStartOf="parent"
                    app:layout_constraintEnd_toEndOf="parent"/>

            </androidx.constraintlayout.widget.ConstraintLayout>

        </com.google.android.material.appbar.CollapsingToolbarLayout>

    </com.google.android.material.appbar.AppBarLayout>

    <androidx.viewpager2.widget.ViewPager2
        android:id="@+id/view_pager"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_behavior="@string/appbar_scrolling_view_behavior" />

</androidx.coordinatorlayout.widget.CoordinatorLayout>