省市区三级联动

package com.example.activity;import android.app.Activity;import android.os.Bundle;import android.view.Menu;import android.view.MenuItem;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} };@Overrideprotected 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() {@Overridepublic void onNothingSelected(AdapterView<?> arg0) {}// 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@Overridepublic void onItemSelected(AdapterView<?> parent,View view, int position, long id) {// 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}});// 地级下拉监听citySpinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {@Overridepublic 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);}@Overridepublic void onNothingSelected(AdapterView<?> arg0) {}});}}