Java é simples, apenas chama o xml
Tela
xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="#8B8B83"
android:padding="10dip" >
<TextView
android:id="@+id/labelUsuario"
android:layout_width="55dip"
android:layout_height="wrap_content"
android:text="Usuário: " />
<!-- Ao lado do label Usuário "layout_toRight"
-->
<EditText
android:id="@+id/campoUsuario"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_toRightOf="@id/labelUsuario"
android:background="@android:drawable/editbox_background" />
<!-- Senha: abaixo do campoUsuario "layout_below", alinhado a esquerda
-->
<TextView
android:id="@+id/labelSenha"
android:layout_width="55dip"
android:layout_height="wrap_content"
android:layout_below="@id/campoUsuario"
android:gravity="left"
android:text="Senha: " />
<!-- Ao lado do label Senha "layout_toRight"
-->
<EditText
android:id="@+id/campoSenha"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignTop="@id/labelSenha"
android:layout_toRightOf="@id/labelSenha"
android:background="@android:drawable/editbox_background"
android:password="true" />
<!-- Abaixo do campoSenha "layout_below", alinhado a direita
-->
<Button
android:id="@+id/btLogin"
android:layout_width="wrap_content"
android:layout_height="35dip"
android:layout_alignParentRight="true"
android:layout_below="@id/campoSenha"
android:layout_marginTop="10dip"
android:text="Login" />
</RelativeLayout>