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);
    }
}