Android 之 自动提示功能(AutoCompleteTextView)的使用

在android中我们可以使用AutoCompleteTextView来实现自动提示功能。
我们将需要进行提示的数据放入ArrayAdapter中，然后用AutoCompleteTextView的setAdapter方法，就可以让AutoCompleteTextView具有自动完成提示的功能了.

autocomplete.xml代码

<?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>

java代码

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

/**
 * 自动完成文本
 * @author daist
 * @date 2010-9-25
 */
public class AutoCompleteActivity extends Activity {

	private static final String[] COUNTRIES = {"China","Russia","Germany",
		"Ukraine","Belarus","USA","China1","China2","USA1"};

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.autocomplete);
		//创建一个ArrayAdapter
		ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
				android.R.layout.simple_dropdown_item_1line,COUNTRIES);
		//获取AutoCompleteTextView对象
		AutoCompleteTextView autoComplete = (AutoCompleteTextView) findViewById(R.id.autoComplete);
		//将AutoCompleteTextView与ArrayAdapter进行绑定
		autoComplete.setAdapter(adapter);
		//设置AutoCompleteTextView输入1个字符就进行提示
		autoComplete.setThreshold(1);
	}
}

运行效果

[img]http://dl.iteye.com/upload/attachment/316472/50d6f300-502b-3958-887e-d4db6a1c1500.png[/img]