AutoCompleteTextView

 

 

 

activity_main.xml文件

<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: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.autocompletetextviewdemo.MainActivity" >

 

    <AutoCompleteTextView

        android:id="@+id/autoCompleteTextView1"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:hint="请输入要搜索的关键字"

        android:completionThreshold="2" >

 

        <requestFocus />

    </AutoCompleteTextView>

 

</LinearLayout>

MainActivity.java

package com.example.autocompletetextviewdemo;

 

import android.support.v7.app.ActionBarActivity;

import android.os.Bundle;

import android.view.Menu;

import android.view.MenuItem;

import android.widget.ArrayAdapter;

import android.widget.AutoCompleteTextView;

 

public class MainActivity extends ActionBarActivity {

//声明控件

AutoCompleteTextView actv;

String[] str={"beijing","beijing1","beijing2","nanjing","yanjing","yantai","nanguo"};

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

//初始化控件

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

//需要一个适配器

ArrayAdapter<String> adapter=new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, str);

//将适配器与控件绑定

actv.setAdapter(adapter);

}

 

}