TextView Autocompletado

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:orientation="vertical"
    tools:context="org.example.textviewautocompletado.MainActivity">

    <AutoCompleteTextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="Nombre completo"
        android:id="@+id/autoCompleteTextView1" />

    <AutoCompleteTextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="Profesión"
        android:id="@+id/autoCompleteTextView2" />

</LinearLayout>

    <string-array name="profesion_array">
        <item>Ingenieria de Sistemas</item>
        <item>Ingenieria de Alimentos</item>
        <item>Ingenieria Civil</item>
        <item>Ingenieria Agronomica</item>
        <item>Ingenieria Biomedica</item>
        <item>Ingenieria del Lado Oscuro</item>
    </string-array>

package org.example.textviewautocompletado;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.ArrayAdapter;
import android.widget.AutoCompleteTextView;

public class MainActivity extends AppCompatActivity {

    private AutoCompleteTextView autoCompleteTextView1;
    private AutoCompleteTextView autoCompleteTextView2;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        //se declaran los AutoCompleteTextView
        autoCompleteTextView1 = (AutoCompleteTextView) findViewById(R.id.autoCompleteTextView1);
        autoCompleteTextView2 = (AutoCompleteTextView) findViewById(R.id.autoCompleteTextView2);

        //en un array declaramos los valores del AutoCompleteTextView 1
        String[] nombres = {"Alto PDo Stoy",
                "Alejandro Gado",
                "Alen Gualarga",
                "Alex Cremento",
                "Alex Plosivo",
                "Alma Marcela Goza",
                "Alma María Rico",
                "Amilcar Cajada",
                "Ana Busado de Hesa",
                "Ana Konda",
                "Ana Lisa Meltrozo",
                "Ana Tomía",
                "Andrés Tatua",
                "Andrés Tresado",
                "Aquíles Meo de Latorre",
                "Ariel C. Pillado",
                "Armando Esteban Quito"};

        //en otro array cargamos los datos del array del archivo strings.xml para el AutoCompleteTextView 2
        String[] profesion = getResources().getStringArray(R.array.profesion_array);

        //cargamos los array en los AutoCompleteTextView
        
        //AutoCompleteTextView 1 NOMBRES
        ArrayAdapter<String> adapter1 = new ArrayAdapter<>(this, R.layout.support_simple_spinner_dropdown_item,nombres);
        autoCompleteTextView1.setAdapter(adapter1);
        //AutoCompleteTextView 2 PROFESION
        ArrayAdapter<String> adapter2 = new ArrayAdapter<>(this, R.layout.support_simple_spinner_dropdown_item,profesion);
        autoCompleteTextView2.setAdapter(adapter2);
        
    }//end: onCreate

}