android控件之Spinner（动态生成下拉内容）

main.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout     xmlns:android="http://schemas.android.com/apk/res/android"    android:orientation="vertical"     android:layout_width="fill_parent"    android:layout_height="fill_parent">    <TextView         android:id="@+id/info_city"        android:layout_width="fill_parent"        android:layout_height="wrap_content"         android:text="请选择您喜欢的城市：" />    <Spinner         android:id="@+id/mycity"        android:prompt="@string/city_prompt"        android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:entries="@array/city_labels"/>    <TextView         android:id="@+id/info_color"        android:layout_width="fill_parent"        android:layout_height="wrap_content"         android:text="请选择您喜欢的颜色：" />    <Spinner         android:id="@+id/mycolor"        android:layout_width="fill_parent"        android:layout_height="wrap_content" />    <TextView         android:id="@+id/info_edu"        android:layout_width="fill_parent"        android:layout_height="wrap_content"         android:text="请选择您的学历：" />    <Spinner         android:id="@+id/myedu"        android:layout_width="fill_parent"        android:layout_height="wrap_content" /></LinearLayout>

strings.xml

<?xml version="1.0" encoding="utf-8"?><resources>    <string name="hello">Hello World, MySpinnerDemo!</string>    <string name="app_name">下拉列表</string>    <string name="city_prompt">请选择您喜欢的城市：</string></resources>color_data.xml<?xml version="1.0" encoding="utf-8"?><resources>    <string-array name="color_labels">        <item>红色</item>        <item>绿色</item>        <item>蓝色</item>    </string-array></resources>

city_data.xml

<?xml version="1.0" encoding="utf-8"?><resources>    <string-array name="city_labels">        <item>北京</item>        <item>上海</item>        <item>南京</item>    </string-array></resources>

MySpinnerDemo.java

package org.lxh.demo;import java.util.ArrayList;import java.util.List;import android.app.Activity;import android.os.Bundle;import android.widget.ArrayAdapter;import android.widget.Spinner;public class MySpinnerDemo extends Activity {    private Spinner spiColor = null; // 表示要读取的颜色列表框    private Spinner spiEdu = null; // 定义下拉列表    private ArrayAdapter<CharSequence> adapterColor = null; // 所有的数据都是String    private ArrayAdapter<CharSequence> adapterEdu = null; // 所有的数据肯定是字符串    private List<CharSequence> dataEdu = null; // 定义一个集合数据    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        super.setContentView(R.layout.main);        this.spiColor = (Spinner) super.findViewById(R.id.mycolor); // 取得颜色的下拉框        this.spiColor.setPrompt("请选择您喜欢的颜色：");        this.adapterColor = ArrayAdapter.createFromResource(this,                R.array.color_labels, android.R.layout.simple_spinner_item); // 实例化了ArrayAdapter        this.adapterColor                .setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); // 换个风格        this.spiColor.setAdapter(this.adapterColor); // 设置显示信息        // 配置List集合包装的下拉框内容        this.dataEdu = new ArrayList<CharSequence>();        this.dataEdu.add("大学");        this.dataEdu.add("研究生");        this.dataEdu.add("高中");        this.spiEdu = (Spinner) super.findViewById(R.id.myedu); // 取得下拉框        this.spiEdu.setPrompt("请选择您喜欢的学历：");        this.adapterEdu = new ArrayAdapter<CharSequence>(this,                android.R.layout.simple_spinner_item, this.dataEdu); // 准备好下拉列表框的内容        this.adapterEdu                 .setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); // 换个风格        this.spiEdu.setAdapter(this.adapterEdu);    //为学历下拉框添加OnItemSelectedListener事件监听器      this.spiEdu.setOnItemSelectedListener(new OnItemSelectedListener() {        //选中触发的事件        public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2,                long arg3) {            String result=arg0.getItemAtPosition(arg2).toString();            Log.i("你的学历是：", result);                    }        public void onNothingSelected(AdapterView<?> arg0) {            // TODO Auto-generated method stub                    }    });    }}