<LinearLayout
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal"
    android:padding="0sp">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Dark background"
        android:textAppearance="@style/TextAppearance.AppCompat.Title" />

    <RadioButton android:id="@+id/radio_darkbackground"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:onClick="onRadioButtonClicked"
        android:layout_gravity="right"
        android:gravity="right"/>
</LinearLayout>