android的控件详解autoCompleteContextTextView和MultiAutoCompleteContextTextView

AutoCompleteContextTextView和MultiAutoCompleteContextTextView控件类似于百度搜索框的提示栏，和有道词典的提示功能

例如我们输入关键字会有，提示，这两个控件完成的就是这个功能，不过autoCompleteContextTextView是匹配一个而MultiautoCompleteContextTextView匹配多个，以分割符作为分割点，再次匹配

代码测试

package com.example.autocontextview;

import android.app.Activity;

import android.os.Bundle;

import android.view.Menu;

import android.view.MenuItem;

import android.widget.AdapterView.AdapterContextMenuInfo;

import android.widget.ArrayAdapter;

import android.widget.AutoCompleteTextView;

import android.widget.MultiAutoCompleteTextView;

public class MainActivity extends Activity {
//声明控件
private AutoCompleteTextView autoContextTextView=null;
private MultiAutoCompleteTextView multiContextTextView=null;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        //获取控件

        autoContextTextView=(AutoCompleteTextView) findViewById(R.id.autoCompleteTextView1);

        multiContextTextView=(MultiAutoCompleteTextView) findViewById(R.id.multiAutoCompleteTextView1);

        //定义数据源

        String[] res={"leige1","leige2","leige3","beijin","beijin1",

        "beijin2","beijin3","shanghai1","shanghai2","shanghai3"

        };

        //定义适配器

        ArrayAdapter< String> adapter=

        //三个参数，布局对象，布局（这里采用系统布局），数据源

        new ArrayAdapter<String>(MainActivity.this

        , R.layout.support_simple_spinner_dropdown_item,

        res);

        //设置适配器

        autoContextTextView.setAdapter(adapter);

        multiContextTextView.setAdapter(adapter);

        //设置分隔符，autoCompleteContextTextView不需要设置，，，MultiautoCompleteContextTextView需要设置

        multiContextTextView.setTokenizer(new MultiAutoCompleteTextView.CommaTokenizer());

    }

}

布局配置

<RelativeLayout 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"

    tools:context="com.example.autocontextview.MainActivity" >

    <AutoCompleteTextView

        android:id="@+id/autoCompleteTextView1"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_alignParentLeft="true"

        android:layout_alignParentTop="true"

        android:layout_marginLeft="22dp"

        android:layout_marginTop="15dp"

        android:ems="10"

        android:completionThreshold="2"

        android:hint="@string/AutoCompeleteTextView"

         >

        <requestFocus />

    </AutoCompleteTextView>

    <!-- -android:completionThreshold="2"配置开始匹配的字符个数 -->

    <MultiAutoCompleteTextView

        android:id="@+id/multiAutoCompleteTextView1"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_alignParentLeft="true"

        android:layout_below="@+id/autoCompleteTextView1"

        android:layout_marginTop="47dp"

        android:ems="10"

        android:hint="@string/MutiAutoContextTextView" />

</RelativeLayout>

运行结果

：