logindesign_content_main.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"
    android:layout_weight="1"
    android:background="@color/background_color_login"
    app:layout_behavior="@string/appbar_scrolling_view_behavior"
    tools:context="com.juragancode.logindesign.MainActivity"
    tools:showIn="@layout/activity_main">
<ImageView
    android:id="@+id/img_icon"
    android:layout_width="100dp"
    android:layout_height="100dp"
    android:layout_marginTop="@dimen/fourty_margin"
    android:src="@drawable/icon_gift"
    android:layout_alignParentTop="true"
    android:layout_centerInParent="true"
    />
  <TextView
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:textSize="30dp"
      android:text="Welcome"
      android:textColor="@android:color/white"
      android:layout_below="@+id/img_icon"
      android:layout_centerInParent="true"
      android:textStyle="bold"
      />
<LinearLayout
    android:layout_centerInParent="true"
    android:orientation="vertical"
    android:background="@drawable/box_login_line"
    android:layout_width="match_parent"
    android:layout_alignParentBottom="true"
    android:layout_height="wrap_content">
  <EditText
      android:layout_width="match_parent"
      android:layout_height="40dp"
      android:layout_margin="@dimen/twelve_margin"

      android:background="@drawable/textbox_login_shadow"
      android:hint="Username"
      android:inputType="text"
      android:textColorHint="@android:color/white"
      android:paddingLeft="10dp"
      />

    <EditText
        android:layout_width="match_parent"
        android:layout_height="40dp"
        android:layout_margin="@dimen/twelve_margin"
        android:layout_centerInParent="true"
        android:background="@drawable/textbox_login_shadow"
        android:hint="Password"
        android:textColorHint="@android:color/white"
        android:paddingLeft="10dp"
        android:inputType="textPassword"
        />
    <Button
        android:layout_width="match_parent"
        android:layout_height="50dp"
        android:text="Login"
        android:textStyle="bold"
        android:textSize="20dp"
        android:textColor="@android:color/white"
        android:layout_margin="20dp"
        android:background="@drawable/box_login_line"
        />

</LinearLayout>
</RelativeLayout>