Android使用AutoCompleteTextView实现自动填充功能的案例

<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 

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;
 }
}

<?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;
 }
}