Android实现动态自动匹配输入内容

package com.example.myapplication;
 
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.widget.ArrayAdapter;
import android.widget.AutoCompleteTextView;
import android.widget.MultiAutoCompleteTextView;
 
public class MainActivity extends AppCompatActivity {
  //初始化控件
  private AutoCompleteTextView autoCompleteTextView;
  private MultiAutoCompleteTextView multiAutoCompleteTextView;
  //初始化数据源
  private String [] res = {"biejing","nangchang","chengdu","shanghai"};
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    /**
     * AutoCompleteTextView的用法
     */
    autoCompleteTextView = (AutoCompleteTextView) findViewById(R.id.auto_textView);
    //创建适配器
    ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,res);
    //将adapter与autoCompleteTextView绑定
    autoCompleteTextView.setAdapter(adapter);
 
    /**
     * MultiAutoCompleteTextView的用法
     */
    multiAutoCompleteTextView = (MultiAutoCompleteTextView) findViewById(R.id.mauto_textView);
    //将adapter与multiAutoCompleteTextView绑定
    multiAutoCompleteTextView.setAdapter(adapter);
    //设置以逗号为分隔符结束的符号
    multiAutoCompleteTextView.setTokenizer(new MultiAutoCompleteTextView.CommaTokenizer());
 
  }
}

<?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:id="@+id/activity_main"
  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.example.myapplication.MainActivity"
  android:orientation="vertical"
  >
 
  <AutoCompleteTextView
    android:completionThreshold="3"
    android:id="@+id/auto_textView"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:hint="请输入关键字"
    />
  <MultiAutoCompleteTextView
    android:hint="请输入多个关键字"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_below="@+id/auto_textView"
    android:id="@+id/mauto_textView" />
 
</RelativeLayout>