主要实现办法：动态加载各级下拉值的适配器
在监听本级下拉框，当本级下拉框的选中值改变时，随之修改下级的适配器的绑定值
xml布局：
<linearlayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:padding="8dp" >
<spinner
android:id="@+id/spin_province"
android:layout_width="80dp"
android:layout_height="wrap_content" />
<spinner
android:id="@+id/spin_city"
android:layout_width="112dp"
android:layout_height="wrap_content" />
<spinner
android:id="@+id/spin_county"
android:layout_width="100dp"
android:layout_height="wrap_content" />
</linearlayout>
实现代码：
package com.example.android.demo.spinner;
import android.os.bundle;
import android.app.activity;
import android.view.view;
import android.widget.adapterview;
import android.widget.arrayadapter;
import android.widget.spinner;
public class mainactivity extends activity
{
private spinner provincespinner = null; //省级（省、直辖市）
private spinner cityspinner = null; //地级市
private spinner countyspinner = null; //县级（区、县、县级市）
arrayadapter<string> provinceadapter = null; //省级适配器
arrayadapter<string> cityadapter = null; //地级适配器
arrayadapter<string> countyadapter = null; //县级适配器
static int provinceposition = 3;
//省级选项值
private string[] province = new string[] {"北京","上海","天津","广东"};//,"重庆","黑龙江","江苏","山东","浙江","香港","澳门"};
//地级选项值
private string[][] city = new string[][]
{
{ "东城区", "西城区", "崇文区", "宣武区", "朝阳区", "海淀区", "丰台区", "石景山区", "门头沟区",
"房山区", "通州区", "顺义区", "大兴区", "昌平区", "平谷区", "怀柔区", "密云县",
"延庆县" },
{ "长宁区", "静安区", "普陀区", "闸北区", "虹口区" },
{ "和平区", "河东区", "河西区", "南开区", "河北区", "红桥区", "塘沽区", "汉沽区", "大港区",
"东丽区" },
{ "广州", "深圳", "韶关" // ,"珠海","汕头","佛山","湛江","肇庆","江门","茂名","惠州","梅州",
// "汕尾","河源","阳江","清远","东莞","中山","潮州","揭阳","云浮"
}
};
//县级选项值
private string[][][] county = new string[][][]
{
{ //北京
{"无"},{"无"},{"无"},{"无"},{"无"},{"无"},{"无"},{"无"},{"无"},{"无"},
{"无"},{"无"},{"无"},{"无"},{"无"},{"无"},{"无"},{"无"}
},
{ //上海
{"无"},{"无"},{"无"},{"无"},{"无"}
},
{ //天津
{"无"},{"无"},{"无"},{"无"},{"无"},{"无"},{"无"},{"无"},{"无"},{"无"}
},
{ //广东
{"海珠区","荔湾区","越秀区","白云区","萝岗区","天河区","黄埔区","花都区","从化市","增城市","番禺区","南沙区"}, //广州
{"宝安区","福田区","龙岗区","罗湖区","南山区","盐田区"}, //深圳
{"武江区","浈江区","曲江区","乐昌市","南雄市","始兴县","仁化县","翁源县","新丰县","乳源县"} //韶关
}
};
@override
protected void oncreate(bundle savedinstancestate)
{
super.oncreate(savedinstancestate);
setcontentview(r.layout.activity_main);
setspinner();
}
/*
* 设置下拉框
*/
private void setspinner()
{
provincespinner = (spinner)findviewbyid(r.id.spin_province);
cityspinner = (spinner)findviewbyid(r.id.spin_city);
countyspinner = (spinner)findviewbyid(r.id.spin_county);
//绑定适配器和值
provinceadapter = new arrayadapter<string>(mainactivity.this,
android.r.layout.simple_spinner_item, province);
provincespinner.setadapter(provinceadapter);
provincespinner.setselection(3,true); //设置默认选中项，此处为默认选中第4个值
cityadapter = new arrayadapter<string>(mainactivity.this,
android.r.layout.simple_spinner_item, city[3]);
cityspinner.setadapter(cityadapter);
cityspinner.setselection(0,true); //默认选中第0个
countyadapter = new arrayadapter<string>(mainactivity.this,
android.r.layout.simple_spinner_item, county[3][0]);
countyspinner.setadapter(countyadapter);
countyspinner.setselection(0, true);
//省级下拉框监听
provincespinner.setonitemselectedlistener(new adapterview.onitemselectedlistener()
{
// 表示选项被改变的时候触发此方法，主要实现办法：动态改变地级适配器的绑定值
@override
public void onitemselected(adapterview<?> arg0, view arg1, int position, long arg3)
{
//position为当前省级选中的值的序号
//将地级适配器的值改变为city[position]中的值
cityadapter = new arrayadapter<string>(
mainactivity.this, android.r.layout.simple_spinner_item, city[position]);
// 设置二级下拉列表的选项内容适配器
cityspinner.setadapter(cityadapter);
provinceposition = position; //记录当前省级序号，留给下面修改县级适配器时用
}
@override
public void onnothingselected(adapterview<?> arg0)
{
}
});
//地级下拉监听
cityspinner.setonitemselectedlistener(new adapterview.onitemselectedlistener()
{
@override
public void onitemselected(adapterview<?> arg0, view arg1,
int position, long arg3)
{
countyadapter = new arrayadapter<string>(mainactivity.this,
android.r.layout.simple_spinner_item, county[provinceposition][position]);
countyspinner.setadapter(countyadapter);
}
@override
public void onnothingselected(adapterview<?> arg0)
{
}
});
}
}
要获取下拉框spinner中选中的值，用下面这方法就ok了
provincespinner.getselecteditem().tostring();
cityspinner.getselecteditem().tostring();
countyspinner.getselecteditem().tostring();
the end