Android学习笔记之AutoCompleteTextView自动填充功能的案例

（1）首先实现AutoCompleteTextView功能所需要的适配器数据源共有两种方法，一种结果是手工配置的，另一汇总是通过xml文件制定的数据（当然也可以通过网上资源获得）

这里只讲前两种！

（2）布局的页面代码都一样如下：

<RelativeLayout 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=".MainActivity" >

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:layout_marginTop="34dp"
        android:text="所属城市:"
        android:textSize="20dp" />

    <AutoCompleteTextView
        android:id="@+id/autoCompleteTextView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBottom="@+id/textView1"
        android:layout_toRightOf="@+id/textView1"
        android:ems="10"
        android:text="" >

        <requestFocus />
    </AutoCompleteTextView>

</RelativeLayout>

（2）第一种是通过手工配置的list数据源：

package com.example.autocompletetextview;

public class MainActivity extends Activity {

	private AutoCompleteTextView autoCompleteTextView1;
	private ArrayAdapter<String> adapter;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		autoCompleteTextView1 = (AutoCompleteTextView) this
				.findViewById(R.id.autoCompleteTextView1);

		/*
		 * 1.使用手工方式的list数组适配器
		 */
		adapter = new ArrayAdapter<String>(this,
				android.R.layout.simple_list_item_1, getDataSource());

		autoCompleteTextView1.setAdapter(adapter);
		
	}

	/*
	 * 1.手工设置一个list数组作为数据源
	 */
	public List<String> getDataSource() {
		List<String> list = new ArrayList<String>();
		list.add("beijing");
		list.add("beida");
		list.add("beiren");
		list.add("shanghai");
		list.add("shangzhou");
		list.add("guangzhou");
		list.add("dancheng");
		list.add("ningping");
		list.add("zhoukou");
		list.add("chengdu");
		list.add("heze");
		list.add("zhumadian");
		list.add("luoyang");
		list.add("shuanglou");
		list.add("yizhong");
		list.add("xindu");
		return list;
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}

}

name我们需要在/values/strings文件下添加下边的配置

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

    <string name="app_name">"AutoCompleteTextView "</string>
    <string name="action_settings">Settings</string>
    <string name="hello_world">Hello world!</string>

    <string-array name="countries_array">
        <item>Afghanistan</item>
        <item>Albania</item>
        <item>Algeria</item>
        <item>American Samoa</item>
        <item>Andorra</item>
        <item>Angola</item>
        <item>Anguilla</item>
        <item>Antarctica</item>
        <item>Bfghanistan</item>
        <item>Blbania</item>
        <item>Blgeria</item>
        <item>Bmerican Samoa</item>
        <item>Bndorra</item>
        <item>Bngola</item>
        <item>Bnguilla</item>
        <item>Bntarctica</item>
    </string-array>

</resources>

package com.example.autocompletetextview;

public class MainActivity extends Activity {

	private AutoCompleteTextView autoCompleteTextView1;
	private ArrayAdapter<String> adapter;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		autoCompleteTextView1 = (AutoCompleteTextView) this
				.findViewById(R.id.autoCompleteTextView1);

		
		/*
		 * 2.使用xml文件来配置适配器中的数据源
		 */
		String[] countries = getResources().getStringArray(R.array.countries_array); 
		adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1,countries);
		autoCompleteTextView1.setAdapter(adapter);
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}

}