AndroidAPS/app/src/main/res/layout/number_picker_layout_vertical.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="60dp"
    android:layout_height="100dp"
    android:background="@drawable/background_darkgray"
    android:orientation="vertical">

    <Button
        android:id="@+id/increment"
        android:layout_width="match_parent"
        android:layout_height="30dp"
        android:background="@null"
        android:padding="0dp"
        android:text="+"
        android:textColor="@color/mdtp_white"
        android:textSize="25sp"
        tools:ignore="HardcodedText" />

    <EditText
        android:id="@+id/display"
        android:layout_width="match_parent"
        android:layout_height="40dp"
        android:background="@drawable/border_gray"
        android:gravity="center"
        android:imeOptions="actionDone"
        android:inputType="number"
        android:text="1"
        android:textColor="@android:color/black"
        tools:ignore="HardcodedText" />

    <Button
        android:id="@+id/decrement"
        android:layout_width="match_parent"
        android:layout_height="30dp"
        android:background="@null"
        android:padding="0dp"
        android:text="-"
        android:textColor="@color/mdtp_white"
        android:textStyle="bold"
        tools:ignore="HardcodedText" />

</LinearLayout>