转：Android 之 上拉框(Spinner)的使用

转载：http://imshare.iteye.com/blog/770950?

下拉列表 Spinner。?

Spinner的使用，可以极大提高用户的体验性。当需要用户选择的时候，可以提供一个下拉列表将所有可选的项列出来。供用户选择。?

Demo如下，可以留作参考?

一、使用数组作为数据源?

1.新建一个android的工程?
2.工程的layout.xml文件如下：声明一个TextView控件和一个Spinner控件?

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"  >  <TextView android:id="@+id/spinnerText"  			android:layout_width="fill_parent"   			android:layout_height="wrap_content"></TextView>  <Spinner android:id="@+id/Spinner01"            android:layout_width="fill_parent"           android:layout_height="wrap_content"></Spinner></LinearLayout>

3?java代码?

import android.app.Activity;import android.os.Bundle;import android.view.View;import android.widget.AdapterView;import android.widget.AdapterView.OnItemSelectedListener;import android.widget.ArrayAdapter;import android.widget.Spinner;import android.widget.TextView;public class SpinnerActivity extends Activity {		private static final String[] m={"A型","B型","O型","AB型","其他"};	private TextView view ;	private Spinner spinner;	private ArrayAdapter<String> adapter;	@Override	protected void onCreate(Bundle savedInstanceState) {		// TODO Auto-generated method stub		super.onCreate(savedInstanceState);		setContentView(R.layout.spinner);				view = (TextView) findViewById(R.id.spinnerText);		spinner = (Spinner) findViewById(R.id.Spinner01);		//将可选内容与ArrayAdapter连接起来		adapter = new ArrayAdapter<String>(this,android.R.layout.simple_spinner_item,m);				//设置下拉列表的风格		adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);				//将adapter 添加到spinner中		spinner.setAdapter(adapter);				//添加事件Spinner事件监听  		spinner.setOnItemSelectedListener(new SpinnerSelectedListener());				//设置默认值		spinner.setVisibility(View.VISIBLE);			}		//使用数组形式操作	class SpinnerSelectedListener implements OnItemSelectedListener{		public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2,				long arg3) {			view.setText("你的血型是："+m[arg2]);		}		public void onNothingSelected(AdapterView<?> arg0) {		}	}}

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二、使用XML作为数据源?
1.新建一个android的工程?

2.在values文件夹下新建一个arryas.xml文件：声明一个TextView控件和一个Spinner控件，代码如下

Xml代码

<?xml version="1.0" encoding="utf-8"?><resources>	<string-array name="plantes">		<item>NOKIA</item>		<item>MOTO</item>		<item>HTC</item>		<item>LG</item>		<item>其他</item>	</string-array></resources>

?3.java代码?

import android.app.Activity;import android.os.Bundle;import android.view.View;import android.widget.AdapterView;import android.widget.AdapterView.OnItemSelectedListener;import android.widget.ArrayAdapter;import android.widget.Spinner;import android.widget.TextView;public class SpinnerActivity extends Activity {		private TextView view2;	private Spinner spinner2;	private ArrayAdapter adapter2;	@Override	protected void onCreate(Bundle savedInstanceState) {		// TODO Auto-generated method stub		super.onCreate(savedInstanceState);		setContentView(R.layout.spinner);		spinner2 = (Spinner) findViewById(R.id.spinner02);		view2 = (TextView) findViewById(R.id.spinnerText02);		//将可选内容与ArrayAdapter连接起来		adapter2 = ArrayAdapter.createFromResource(this, R.array.plantes, android.R.layout.simple_spinner_item);		//设置下拉列表的风格	 adapter2.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);		//将adapter2 添加到spinner中		spinner2.setAdapter(adapter2);		//添加事件Spinner事件监听  		spinner2.setOnItemSelectedListener(new SpinnerXMLSelectedListener());		//设置默认值		spinner2.setVisibility(View.VISIBLE);			}		//使用XML形式操作	class SpinnerXMLSelectedListener implements OnItemSelectedListener{		public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2,				long arg3) {			view2.setText("你使用什么样的手机："+adapter2.getItem(arg2));		}		public void onNothingSelected(AdapterView<?> arg0) {					}			}}

4、运行效果如下：?

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