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;
 }
}