[java]
package com.gaoxueping.mobile;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.widget.ArrayAdapter;
import android.widget.AutoCompleteTextView;

public class MainActivity extends Activity {
private static final String[] COUNTRIES = {"gaoxueping", "Gaoxueping", "hellogxp", "Gao", "Gavin"};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_dropdown_item_1line,COUNTRIES);
AutoCompleteTextView autoComplete = (AutoCompleteTextView) findViewById(R.id.autoComplete);
autoComplete.setAdapter(adapter);
autoComplete.setThreshold(1);
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}

}
[/java]
布局文件
[xml]
<?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/autoComplete"
android:layout_width="fill_parent"
android:layout_height="wrap_content">
</AutoCompleteTextView>
</LinearLayout>
[/xml]
完整项目文件下载
http://pan.baidu.com/s/1qWPPoeg