Android login interface using GridLayout

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:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:paddingBottom="@dimen/activity_vertical_margin"
    tools:context=".MainActivity">

    <!--

    <TextView android:text="@string/hello_world" android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Navigate"
        android:id="@+id/button"
        android:layout_centerVertical="true"
        android:layout_centerHorizontal="true" />

    -->

    <GridLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_alignParentTop="true"
        android:layout_alignParentRight="true"
        android:layout_alignParentEnd="true"
        android:columnCount="3"
        android:useDefaultMargins="true"
        android:alignmentMode="alignBounds" >

        <Button
            android:id="@+id/buttonLogin"
            android:layout_column="2"
            android:layout_row="3"
            android:text="Login" />

        <TextView
            android:textAppearance="?android:attr/textAppearanceLarge"
            android:text="Credenciales de usuario"
            android:id="@+id/textView2"
            android:layout_row="0"
            android:layout_column="0"
            android:layout_columnSpan="3"
            android:textColor="@color/material_blue_grey_800"
            android:textSize="30dp"/>

        <TextView
            android:textAppearance="?android:attr/textAppearanceMedium"
            android:text="Usuario:"
            android:id="@+id/textView"
            android:layout_row="1"
            android:layout_column="0"
            android:layout_gravity="right"/>

        <EditText
            android:id="@+id/editText11"
            android:layout_row="1"
            android:layout_column="1"
            android:layout_columnSpan="2"
            android:layout_gravity="fill_horizontal"/>

        <TextView
            android:textAppearance="?android:attr/textAppearanceMedium"
            android:text="Password:"
            android:id="@+id/textView3"
            android:layout_row="2"
            android:layout_column="0" />

        <EditText
            android:id="@+id/editText12"
            android:layout_row="2"
            android:layout_column="1"
            android:layout_columnSpan="2"
            android:inputType="textPassword"
            android:layout_gravity="fill_horizontal"/>

    </GridLayout>
</RelativeLayout>