Android中的AutoCompleteTextView的使用

main.xml代码如下：

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<?xml version="1.0" encoding="utf-8"?>

<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:completionHint="请选择你喜欢的歌曲"

        android:completionThreshold="1"

        android:dropDownHorizontalOffset="20dp"

        android:ems="10"

        android:text="AutoCompleteTextView" >

 

        <requestFocus />

    </AutoCompleteTextView>

 

</LinearLayout>

java代码为：

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package android.demo;

 

import android.app.Activity;

import android.graphics.Bitmap;

import android.graphics.BitmapFactory;

import android.graphics.drawable.BitmapDrawable;

import android.os.Bundle;

import android.view.MotionEvent;

import android.view.View;

import android.view.View.OnClickListener;

import android.view.View.OnTouchListener;

import android.widget.ArrayAdapter;

import android.widget.AutoCompleteTextView;

import android.widget.Button;

import android.widget.ImageView;

 

public class AndroidDemo5Activityextends 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.main);

 

        // 创建一个ArrayAdapter封装数组

        ArrayAdapter<String> av = new ArrayAdapter<String>(this,

                android.R.layout.simple_dropdown_item_1line, books);

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

        auto.setAdapter(av);

    }

}