xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    app:layout_behavior="@string/appbar_scrolling_view_behavior"
    tools:context="me.zhanghai.android.patternlock.sample.app.Main"
    tools:showIn="@layout/main"
    android:background="@android:color/darker_gray"
    android:contextClickable="true">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="username"
        android:id="@+id/username"
        android:textColor="#030303"
        android:textSize="@dimen/abc_dropdownitem_icon_width"
        android:layout_marginTop="64dp"
        android:layout_below="@+id/app"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="phone number"
        android:id="@+id/ph_num"
        android:textColor="#030303"
        android:textSize="@dimen/abc_dropdownitem_icon_width"
        android:layout_centerVertical="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:text="OfflineApp"
        android:id="@+id/app"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:textStyle="italic"
        android:theme="@style/AppTheme"
        android:textSize="@dimen/abc_alert_dialog_button_bar_height"
        android:textColor="#fdfdfd" />

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="save"
        android:id="@+id/button_save"
        android:textColor="#fdfdfd"
        android:background="@android:color/holo_green_light"
        android:singleLine="false"
        android:layout_alignParentBottom="true"
        android:layout_toRightOf="@+id/username"
        android:layout_toEndOf="@+id/username" />

    <EditText
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:inputType="phone"
        android:ems="10"
        android:id="@+id/editText_phone"
        android:hint="1234567890"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_alignParentRight="true"
        android:layout_alignParentEnd="true"
        android:background="#ffffff"
        android:layout_below="@+id/ph_num" />

    <EditText
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:inputType="textEmailAddress"
        android:ems="10"
        android:id="@+id/editText_username"
        android:hint="enter email"
        android:background="#ffffff"
        android:focusable="false"
        android:layout_below="@+id/username"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_alignRight="@+id/editText_phone"
        android:layout_alignEnd="@+id/editText_phone"
        android:contextClickable="true" />
</RelativeLayout>