Android实现多层级Spinner列表选项实时更新树形层级

Java代码：

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) {

					}
				});
	}
}

布局文件：

<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>