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"
    tools:context=".EmailActivity">

    <android.support.design.widget.TextInputLayout
        android:id="@+id/input_layout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">
    </android.support.design.widget.TextInputLayout>

    <com.rengwuxian.materialedittext.MaterialEditText
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="Email"
        android:layout_below="@id/input_layout"
        app:met_baseColor="#000"
        app:met_primaryColor="#000"
        app:met_errorColor="#f22a37"
        app:met_floatingLabel="highlight"
        android:layout_marginTop="5dp"
        android:id="@+id/txtemail"
        app:met_singleLineEllipsis="true"
        android:inputType="textEmailAddress" />

    <com.rengwuxian.materialedittext.MaterialEditText
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="Subject"
        app:met_baseColor="#000"
        app:met_primaryColor="#000"
        app:met_errorColor="#f22a37"
        app:met_floatingLabel="highlight"
        android:layout_marginTop="5dp"
        android:id="@+id/txtsubject"
        android:layout_below="@id/txtemail"
        app:met_singleLineEllipsis="true"
        android:inputType="textEmailAddress" />

    <com.rengwuxian.materialedittext.MaterialEditText
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="Imput Email"
        app:met_baseColor="#000"
        app:met_primaryColor="#000"
        app:met_errorColor="#f22a37"
        app:met_floatingLabel="normal"
        android:lines="30"
        android:gravity="top|left"
        android:layout_marginTop="5dp"
        android:layout_below="@id/txtsubject"
        android:id="@+id/txtemaisi" />

    <Button
        android:text="Send"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_alignParentLeft="true"
        android:id="@+id/btnemsend" />
</RelativeLayout>