多层级Spinner列表选项实时更新树形层级(选择城市)

 package com.example.spinnerdemo;

 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（省、直辖市）
     private Spinner citySpinner = null; // 市
     private Spinner countrySpinner = null; // 区

     private ArrayAdapter<String> provinceAdapter = null; // 省
     private ArrayAdapter<String> cityAdapter = null; // 市
     private ArrayAdapter<String> countryAdapter = null; // 区

     private 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"};

     // 市级选项值
     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"
             } };

     // 区县级选项值
     private String[][][] country = 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);

         provinceSpinner = (Spinner) findViewById(R.id.spinner_province);
         citySpinner = (Spinner) findViewById(R.id.spinner_city);
         countrySpinner = (Spinner) findViewById(R.id.spinner_country);

         // 装载适配器和值
         provinceAdapter = new ArrayAdapter<String>(this,
                 android.R.layout.simple_spinner_item, province);
         provinceSpinner.setAdapter(provinceAdapter);

         cityAdapter = new ArrayAdapter<String>(this,
                 android.R.layout.simple_spinner_item, city[3]);
         citySpinner.setAdapter(cityAdapter);

         countryAdapter = new ArrayAdapter<String>(this,
                 android.R.layout.simple_spinner_item, country[3][0]);
         countrySpinner.setAdapter(countryAdapter);

         // 省下拉框监听
         provinceSpinner
                 .setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {

                     @Override
                     public void onItemSelected(AdapterView<?> arg0, View arg1,
                             int position, long arg3) {

                         cityAdapter = new ArrayAdapter<String>(
                                 getApplication(),
                                 android.R.layout.simple_spinner_item,
                                 city[position]);
                         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) {

                     }

                 });

         // 市级下拉监听
         citySpinner
                 .setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {

                     @Override
                     public void onItemSelected(AdapterView<?> arg0, View arg1,
                             int position, long arg3) {
                         countryAdapter = new ArrayAdapter<String>(
                                 getApplication(),
                                 android.R.layout.simple_spinner_item,
                                 country[provincePosition][position]);
                         countrySpinner.setAdapter(countryAdapter);
                     }

                     @Override
                     public void onNothingSelected(AdapterView<?> arg0) {

                     }
                 });
     }
 }

xml：

 <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="match_parent"
     android:background="#e0e0e0"
     android:orientation="horizontal" >
     <Spinner
         android:id="@+id/spinner_province"
         android:layout_width="0dip"
         android:layout_weight="1"
         android:layout_height="wrap_content" />

     <Spinner
         android:id="@+id/spinner_city"
         android:layout_width="0dip"
         android:layout_weight="1"
         android:layout_height="wrap_content" />

     <Spinner
         android:id="@+id/spinner_country"
         android:layout_width="0dip"
         android:layout_weight="1"
         android:layout_height="wrap_content" />
 </LinearLayout>