activity_user.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:id="@+id/activity_user"
    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"
    tools:context="com.mapps.seproject.UserActivity">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/tvWelcome"
        android:textSize="24sp"
        android:text="test"
        android:layout_centerHorizontal="true" />

    <Button
        android:text="Sign Out"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/bSignOut"
        android:layout_alignParentTop="true"
        android:layout_alignParentEnd="true" />

    <Spinner
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/spSelectCitiy"
        android:layout_marginTop="31dp"
        android:layout_below="@+id/bSignOut"
        android:layout_alignParentStart="true" />

    <Button
        android:text="Add Image"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/bAddImage"
        android:layout_above="@+id/bComposeMail"
        android:layout_alignEnd="@+id/bComposeMail"
        android:layout_alignStart="@+id/bComposeMail" />

    <Button
        android:text="Compose Email"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/bComposeMail"
        android:layout_alignParentBottom="true"
        android:layout_centerHorizontal="true" />

    <EditText
        android:layout_width="match_parent"
        android:layout_height="250dp"
        android:inputType="textPersonName"
        android:ems="10"
        android:layout_centerVertical="true"
        android:layout_centerHorizontal="true"
        android:id="@+id/tvEmailMessage"
        android:hint="Enter your complaint here"
        android:visibility="visible" />

</RelativeLayout>