<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".SpinnerMainActivity" >

    <EditText
        android:id="@+id/et_number"
        android:layout_width="200dip"
        android:layout_height="wrap_content" />

    <ImageButton
        android:id="@+id/ib_down_arrow"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBottom="@id/et_number"
        android:layout_alignRight="@id/et_number"
        android:layout_alignTop="@id/et_number"
        android:layout_marginRight="5dip"
        android:background="@drawable/icon_spinner_down_arrow" />

</RelativeLayout>