PingPoints/app/src/main/res/layout/activity_main.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"
    tools:layout_editor_absoluteY="73dp">

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

        <android.support.v7.widget.Toolbar
            android:id="@+id/toolbar"
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"
            android:layout_marginBottom="8dp"
            android:background="@color/colorPrimary"
            android:elevation="4dp"
            android:theme="@style/ThemeOverlay.AppCompat.ActionBar"
            app:popupTheme="@style/ThemeOverlay.AppCompat.Light" />

        <LinearLayout
            android:id="@+id/linearLayoutText"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginEnd="8dp"
            android:layout_marginLeft="8dp"
            android:layout_marginRight="8dp"
            android:layout_marginStart="8dp"
            android:orientation="horizontal"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            tools:layout_editor_absoluteY="8dp">

            <TextView
                android:id="@+id/textService"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginEnd="8dp"
                android:layout_marginStart="8dp"
                android:layout_weight="1"
                android:gravity="left"
                android:textAppearance="@style/TextAppearance.AppCompat.Large"
                app:layout_constraintBottom_toTopOf="@+id/linearLayoutButtons"
                app:layout_constraintEnd_toEndOf="parent"
                app:layout_constraintHorizontal_bias="1.0"
                app:layout_constraintStart_toEndOf="@+id/textScore"
                app:layout_constraintTop_toTopOf="parent"
                tools:text="@string/service" />

            <TextView
                android:id="@+id/textScore"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:layout_marginLeft="8dp"
                android:layout_marginStart="8dp"
                android:layout_weight="1"
                android:gravity="right|center"
                android:textAppearance="@style/TextAppearance.AppCompat.Large"
                app:layout_constraintStart_toStartOf="parent"
                app:layout_constraintTop_toTopOf="parent"
                tools:text="@string/score" />

        </LinearLayout>

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

            <ImageView
                android:id="@+id/imgLeftService"
                android:layout_width="48dp"
                android:layout_height="match_parent"
                android:layout_margin="8dp"
                android:layout_weight="0"
                android:contentDescription="@string/service_img_description"
                app:srcCompat="@drawable/ic_left_service"
                tools:layout_editor_absoluteY="120dp" />

            <Button
                android:id="@+id/buttonLeftPlayer"
                style="@style/Base.Widget.AppCompat.Button.Colored"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:layout_marginBottom="8dp"
                android:layout_marginLeft="8dp"
                android:layout_marginStart="8dp"
                android:layout_marginTop="8dp"
                android:layout_weight="1"
                android:background="@color/colorAccent"
                android:bufferType="spannable"
                android:onClick="onClickLeftPlayer"
                android:textAllCaps="false"
                android:textAppearance="@style/TextAppearance.AppCompat.Button"
                android:textSize="24sp"
                android:textStyle="bold"
                app:layout_constraintBottom_toBottomOf="parent"
                app:layout_constraintStart_toEndOf="@+id/imgLeftService"
                app:layout_constraintTop_toTopOf="parent"
                tools:text="@string/button_text" />

            <Button
                android:id="@+id/buttonRightPlayer"
                style="@style/Widget.AppCompat.Button.Colored"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:layout_marginBottom="8dp"
                android:layout_marginEnd="8dp"
                android:layout_marginLeft="8dp"
                android:layout_marginRight="8dp"
                android:layout_marginStart="8dp"
                android:layout_marginTop="8dp"
                android:layout_weight="1"
                android:background="@color/colorAccent"
                android:bufferType="spannable"
                android:onClick="onClickRightPlayer"
                android:textAllCaps="false"
                android:textAppearance="@style/TextAppearance.AppCompat.Button"
                android:textSize="24sp"
                android:textStyle="bold"
                app:layout_constraintBottom_toBottomOf="parent"
                app:layout_constraintEnd_toStartOf="@+id/imgRightService"
                app:layout_constraintStart_toEndOf="@+id/buttonLeftPlayer"
                tools:text="@string/button_text" />

            <ImageView
                android:id="@+id/imgRightService"
                android:layout_width="48dp"
                android:layout_height="match_parent"
                android:layout_margin="8dp"
                android:layout_weight="0"
                android:contentDescription="@string/service_img_description"
                tools:layout_editor_absoluteY="120dp" />

        </LinearLayout>

    </LinearLayout>

</android.support.constraint.ConstraintLayout>