自动完成文本框(AutoCompleteTextView与MultiAutoCompleteTextView)关联适配器

 <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"
     tools:context="com.example.lesson6_5_id19.MainActivity" >
     <!--单个字段扩充提示
     completionThreshold是控制用户输入第几个字符开始提示，最小值是1-->
     <AutoCompleteTextView
         android:id="@+id/actv"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:hint="1.请输入联系人"
         android:completionThreshold="1"
         android:singleLine="true"/>

     <!-- 多个字段扩充提示 -->
     <MultiAutoCompleteTextView
         android:id="@+id/mactv"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:hint="2.请输入联系人"
         android:completionThreshold="1"/>

 </LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >
    <!-- 自定义提示筐的TextView -->
    <TextView
        android:id="@+id/tv"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="显示文本"
        android:gravity="center"
        android:padding="10dp"
        android:background="#ccffcc"
        android:textColor="#ff0000"/>
</LinearLayout>

 package com.example.lesson6_5_id19;

 import android.app.Activity;
 import android.os.Bundle;
 import android.widget.ArrayAdapter;
 import android.widget.AutoCompleteTextView;
 import android.widget.MultiAutoCompleteTextView;

 public class MainActivity extends Activity {
     // 把提示的内容放到一个String数组里面
     String[] names = {"zhangshan","lisi","wangwu","zhaoliu",
             "zhangshan","lisi","wangwu","zhaoliu",
             "zhangshan","lisi","wangwu","zhaoliu",
             "zhangshan","lisi","wangwu","zhaoliu",
             "zhangshan","lisi","wangwu","zhaoliu",
             "zhangshan","lisi","wangwu","zhaoliu",};
     AutoCompleteTextView actv;
     MultiAutoCompleteTextView mactv;
     ArrayAdapter<String> adapter;
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
         actv = (AutoCompleteTextView) findViewById(R.id.actv);
         mactv = (MultiAutoCompleteTextView) findViewById(R.id.mactv);
         // 适配器
         // 将数据与视图关联在一起
         // 系统已经帮我们写好了很多layout
         // adapter = new ArrayAdapter<String>(this//1.上下文
         // ,R.layout.item_actv_layout//2.布局
         // ,R.id.tv//该布局上的TextView的id号
         // ,names);//最后一个是数据
         // 选择系统的layout，里面的TextView的id号可以忽略不写
         adapter = new ArrayAdapter<String>(this, R.layout.activity_item, R.id.tv, names);
         //使用“，”来分割。
         mactv.setTokenizer(new MultiAutoCompleteTextView.CommaTokenizer());
         // 将适配器设置到view上
         actv.setAdapter(adapter);
         //设置适配器之前，必须要知道分隔符是什么样的。
         mactv.setAdapter(adapter);
     }
 }