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

    <Button
        android:text="Add"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/add" app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintBottom_toBottomOf="parent"
        android:layout_marginStart="16dp" android:layout_marginBottom="21dp"
        app:layout_constraintTop_toBottomOf="@+id/_dynamic" android:onClick="addItem"/>
    <Button
        android:text="Remove"
        android:layout_width="wrap_content"
        android:layout_height="44dp"
        android:id="@+id/remove"
        app:layout_constraintBottom_toBottomOf="parent" android:layout_marginEnd="16dp"
        android:layout_marginBottom="15dp"
        app:layout_constraintEnd_toEndOf="parent" android:onClick="remove"/>
    <ListView
        android:layout_width="368dp"
        android:layout_height="430dp"
        android:id="@+id/listView" tools:layout_editor_absoluteY="8dp" tools:layout_editor_absoluteX="8dp"/>

</android.support.constraint.ConstraintLayout>