app/src/main/res/layout/view_headphone_jack_test.xml

<?xml version="1.0" encoding="utf-8"?>
<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"
    tools:context=".tests.headphonejack.HeadphoneJackTest">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceMedium"
        android:text="@string/headphone_status"
        android:id="@+id/textView"
        android:layout_gravity="center_horizontal" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceMedium"
        android:text="@string/not_available"
        android:id="@+id/headphone_jack_state_text"
        android:layout_alignTop="@+id/textView"
        android:layout_toEndOf="@+id/textView" />

</RelativeLayout>