Android控件之AutoCompleteTextView（自动匹配输入的内容）

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <AutoCompleteTextView
        android:id="@+id/autoCompleteTextView1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:completionThreshold="2"
        android:hint="请输入要搜索的关键词" />
    
</LinearLayout>

package com.muke.textview_edittext;

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


public class MainActivity extends Activity{
    private AutoCompleteTextView autoTextVIew;
    
    //第三步：初始化数据源——匹配文本框中输入的内容
    private String[] res = {"beijing1","beijing2","beijing3","shanghai1","shanghai2","shenzhen1","shenzhen2","guangzhou1","guangzhou2"};
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        //第一步：找到需要操作的控件
        autoTextVIew = (AutoCompleteTextView) findViewById(R.id.autoCompleteTextView1);
        
        //第二步：需要一个适配器
        //android.R.layout.simple_list_item_1：是系统自带的布局
        ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, res);
    
        //第四步：将adapter与当前AutoCompleteTextView绑定
        autoTextVIew.setAdapter(adapter);
    }
}