activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<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="match_parent"
    android:background="@color/colorBack"
    android:focusable="true"
    android:focusableInTouchMode="true"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.codevscolor.floatinglabeletdemo.MainActivity">

    <android.support.design.widget.TextInputLayout
        android:id="@+id/layout_email"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textColorHint="@color/colorHint">

        <EditText
            android:id="@+id/editTextEmail"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:hint="@string/hint_email"
            android:inputType="textEmailAddress"
            android:textColor="@color/textColor" />
    </android.support.design.widget.TextInputLayout>

    <android.support.design.widget.TextInputLayout
        android:id="@+id/layout_password"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@id/layout_email"
        android:textColorHint="@color/colorHint">

        <EditText
            android:id="@+id/editTextPassword"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="45dp"
            android:hint="@string/hint_password"
            android:inputType="textPassword"
            android:textColor="@color/textColor" />
    </android.support.design.widget.TextInputLayout>

    <Button
        android:id="@+id/button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentEnd="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentRight="true"
        android:layout_alignParentStart="true"
        android:layout_below="@+id/layout_email"
        android:layout_marginTop="104dp"
        android:background="@color/buttoncolor"
        android:text="Login"
        android:textColor="@color/textColor" />
</RelativeLayout>