<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    tools:context=".AuthActivity"
    android:orientation="vertical"
    android:gravity="center">

    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="fill_parent"
        android:gravity="center">

        <Button
            android:id="@+id/confirm"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/confirm">
        </Button>

    </LinearLayout>

</LinearLayout>