package com.example.autocompletetextview;

import java.util.ArrayList;

import java.util.List;

import android.support.v7.app.ActionBarActivity;

import android.os.Bundle;

import android.widget.ArrayAdapter;

import android.widget.AutoCompleteTextView;

public class MainActivity extends ActionBarActivity {

    AutoCompleteTextView autoCompleteTextView = null;

    AutoCompleteTextView auto2 = null;

    private static final String[] COUNTRIES = {"china","canada","Belgium", "France", "Italy", "Germany", "Spain"};

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        autoCompleteTextView = (AutoCompleteTextView) findViewById(R.id.auto1);

        auto2 = (AutoCompleteTextView) findViewById(R.id.auto2);

        /*静态方式，自动匹配的值已经提前设置好了

         * 第一个参数是指当前上下文

         * 第二个参数是显示的匹配布局，此处用的是Android已有的布局

         * 第三个参数是存储自动匹配的值的数组

         */

        ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,android.R.layout.simple_dropdown_item_1line,COUNTRIES);

        autoCompleteTextView.setAdapter(adapter);

        /*

         * 动态方式，自动匹配的值由list决定

         */

        List<String> list = new ArrayList<String>();

        list.add("测试aadd");

        list.add("测试object");

        list.add("测试home");

        ArrayAdapter<String>  adapter2 = new ArrayAdapter<String>(this, R.layout.simple_1, list);

        auto2.setAdapter(adapter2);

    }

}

<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:orientation="vertical" >

    <TextView

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:text="静态实现："/>

    <AutoCompleteTextView

        android:id="@+id/auto1"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"/>

    <TextView

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:text="动态实现："/>

    <AutoCompleteTextView

        android:id="@+id/auto2"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"/>

</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>

    <TextView

        android:id="@+id/textview"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:textSize="20dp"

        xmlns:android="http://schemas.android.com/apk/res/android"/>