android AutoCompleteTextView

    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >


            android:id="@+id/autoCompleteTextView1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:completionHint="请选择你喜欢的歌曲"
        android:completionThreshold="1"
        android:dropDownHorizontalOffset="20dp"
        android:ems="10"
        android:text="AutoCompleteTextView" >


       
   

package com.example.autocomplete;


import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.widget.ArrayAdapter;
import android.widget.AutoCompleteTextView;
import com.example.autocomplete.R;
public class MainActivity extends Activity {


// 定义字符串数组作为提示的文本
String[] books = new String[] { "rollen", "rollenholt", "rollenren", "roll" };


@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);


// 创建一个ArrayAdapter封装数组
ArrayAdapter av = new ArrayAdapter(this,
android.R.layout.simple_dropdown_item_1line, books);
AutoCompleteTextView auto = (AutoCompleteTextView) findViewById(R.id.autoCompleteTextView1);
auto.setAdapter(av);
}


}