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

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".ProfileActivity">


    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">

        <androidx.constraintlayout.widget.ConstraintLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content">

            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:orientation="horizontal"
                app:layout_constraintTop_toTopOf="parent"
                android:layout_margin="20dp">

                <ImageView
                    android:id="@+id/profilePictureImageView"
                    android:layout_width="120dp"
                    android:layout_height="120dp"
                    android:layout_weight="1"
                    tools:srcCompat="@tools:sample/avatars" />

                <LinearLayout
                    android:id="@+id/linearLayout"
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:layout_weight="10"
                    android:orientation="horizontal">

                    <TextView
                        android:id="@+id/nbPostsTextView"
                        android:layout_width="15dp"
                        android:layout_height="match_parent"
                        android:layout_weight="1"
                        android:gravity="center"
                        android:text="-\nPosts" />

                    <TextView
                        android:id="@+id/nbFollowersTextView"
                        android:layout_width="15dp"
                        android:layout_height="120dp"
                        android:layout_weight="1"
                        android:gravity="center"
                        android:text="-\nFollowers" />

                    <TextView
                        android:id="@+id/nbFollowingTextView"
                        android:layout_width="15dp"
                        android:layout_height="120dp"
                        android:layout_weight="1"
                        android:gravity="center"
                        android:text="-\nFollowing" />
                </LinearLayout>

            </LinearLayout>
        </androidx.constraintlayout.widget.ConstraintLayout>

        <androidx.constraintlayout.widget.ConstraintLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="5dp"
            android:layout_marginLeft="20dp"
            android:layout_marginRight="20dp">

            <TextView
                android:id="@+id/accountNameTextView"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:text="No Username"
                app:layout_constraintTop_toTopOf="parent" />

        </androidx.constraintlayout.widget.ConstraintLayout>

        <androidx.constraintlayout.widget.ConstraintLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="5dp"
            android:layout_marginBottom="10dp"
            android:layout_marginRight="20dp"
            android:layout_marginLeft="20dp">

            <TextView
                android:id="@+id/descriptionTextView"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                app:layout_constraintTop_toTopOf="parent" />

        </androidx.constraintlayout.widget.ConstraintLayout>

        <androidx.constraintlayout.widget.ConstraintLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginRight="50dp"
            android:layout_marginLeft="50dp"
            android:layout_marginBottom="15dp">

            <Button
                android:id="@+id/followButton"
                android:layout_width="100dp"
                android:layout_height="30dp"
                android:background="@color/browser_actions_divider_color"
                android:text="Follow"
                android:textColor="@color/colorPrimary"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toTopOf="parent" />

        </androidx.constraintlayout.widget.ConstraintLayout>

        <androidx.constraintlayout.widget.ConstraintLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content">

            <LinearLayout
                android:id="@+id/linearLayout2"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:orientation="horizontal"
                app:layout_constraintTop_toTopOf="parent">

                <ImageButton
                    android:id="@+id/postsButton"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_weight="1"
                    android:background="@color/colorPrimary"
                    android:src="@android:drawable/ic_dialog_dialer" />

                <ImageButton
                    android:id="@+id/collectionButton"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_weight="1"
                    android:background="@color/colorPrimary"
                    android:src="@android:drawable/ic_menu_gallery" />
            </LinearLayout>

        </androidx.constraintlayout.widget.ConstraintLayout>

        <androidx.recyclerview.widget.RecyclerView
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:id="@+id/profilePostsRecyclerView"
            android:layout_marginLeft="5dp"
            android:layout_marginRight="5dp"
            android:layout_marginTop="16dp"
            app:layoutManager="LinearLayoutManager"
            tools:context=".fragments.MyProfileFragment"
            tools:listitem="@layout/fragment_profile_posts"/>
    </LinearLayout>

</androidx.constraintlayout.widget.ConstraintLayout>