drawer_header.xml

<?xml version="1.0" encoding="utf-8"?>
<!--
  ~ Copyright (C) 2015 Antonio Leiva
  ~
  ~ Licensed under the Apache License, Version 2.0 (the "License");
  ~ you may not use this file except in compliance with the License.
  ~ You may obtain a copy of the License at
  ~
  ~       http://www.apache.org/licenses/LICENSE-2.0
  ~
  ~ Unless required by applicable law or agreed to in writing, software
  ~ distributed under the License is distributed on an "AS IS" BASIS,
  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  ~ See the License for the specific language governing permissions and
  ~ limitations under the License.
  -->

<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="172dp"
             android:background="@drawable/drawer_background"
             android:orientation="vertical"
             android:paddingTop="@dimen/status_bar_height"
             android:theme="@style/ThemeOverlay.AppCompat.Dark">

    <ImageView
        android:id="@+id/avatar"
        android:layout_width="64dp"
        android:layout_height="64dp"
        android:layout_margin="@dimen/spacing_large"
        android:elevation="4dp"
        tools:src="@drawable/ic_launcher"/>

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_above="@+id/email"
        android:layout_marginLeft="@dimen/spacing_large"
        android:layout_marginStart="@dimen/spacing_large"
        android:text="Username"
        android:textAppearance="@style/TextAppearance.AppCompat.Body2"/>
    <TextView
        android:id="@+id/email"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_marginLeft="@dimen/spacing_large"
        android:layout_marginStart="@dimen/spacing_large"
        android:layout_marginBottom="@dimen/spacing_large"
        android:text="username@mymail.com"
        android:textAppearance="@style/TextAppearance.AppCompat.Body1"/>

</RelativeLayout>