<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
  xmlns:tools="http://schemas.android.com/tools" 
  android:layout_width="fill_parent" 
  android:layout_height="fill_parent" 
  android:orientation="horizontal" 
  android:background="#000000"> 
  <AutoCompleteTextView 
    android:layout_width="wrap_content" 
    android:text="" 
    android:id="@+id/autoCompleteTextView1" 
    android:completionThreshold="2" 
    android:completionHint="輸入搜索內(nèi)容" 
    android:background="#FFFFFF" 
    android:layout_marginLeft="10px" 
    android:layout_weight="7" 
    android:layout_height="wrap_content"> 
  </AutoCompleteTextView> 
  <Button android:text="搜索" 
    android:id="@+id/button0" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:layout_weight="1" 
    android:layout_marginLeft="10px"/> 
</LinearLayout> 

package com.example.test; 
 
 
import android.app.Activity; 
import android.os.Bundle; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.widget.ArrayAdapter; 
import android.widget.AutoCompleteTextView; 
import android.widget.Button; 
import android.widget.Toast; 
 
 
public class MainActivity extends Activity { 
  //此字符串是要在下拉菜單中顯示的列表項(xiàng) 
  private static final String[] COUNTRIES=new String[]{"HeNan","HeNan大學(xué)", 
    "HeNan理工大學(xué)","HeNan工業(yè)大學(xué)","HeNan萬方科技學(xué)院","HeNan第二附屬醫(yī)院二院"}; 
  @Override 
  protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.main); 
     
    //獲取自動完成文本框 
    final AutoCompleteTextView textView=(AutoCompleteTextView)findViewById(R.id.autoCompleteTextView1); 
    //注意ArrayAdapter與SimpleAdapter的區(qū)別 
    //創(chuàng)建一個(gè)ArrayAdapter適配器 
    ArrayAdapter<String> adapter=new ArrayAdapter<String>(this,android.R.layout.simple_dropdown_item_1line,COUNTRIES); 
    textView.setAdapter(adapter);//為自動完成文本框設(shè)置適配器 
     
    Button button=(Button)findViewById(R.id.button0);//獲取"搜索"按鈕 
    //為搜索按鈕添加事件監(jiān)聽器 
    button.setOnClickListener(new OnClickListener() { 
       
      @Override 
      public void onClick(View arg0) { 
        Toast.makeText(MainActivity.this, textView.getText().toString(),Toast.LENGTH_SHORT).show(); 
         
      } 
    }); 
  } 
}