app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
+ <Button
+ android:id="@+id/button2"
+ android:layout_width="wrap_content"
+ android:layout_height="wrap_content"
+ android:layout_marginBottom="38dp"
+ android:text="@string/btnPlay"
+ app:layout_constraintBottom_toTopOf="@+id/button"
+ tools:layout_editor_absoluteX="147dp" />
+
</android.support.constraint.ConstraintLayout>
\ No newline at end of file