省市县三级菜单联动选择器

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 provinceAdapter = null; // 省级适配器
ArrayAdapter cityAdapter = null; // 地级适配器
ArrayAdapter 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(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(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(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(
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(
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  
// provinceSpinner.getSelectedItem().toString();  
// citySpinner.getSelectedItem().toString();  
// countySpinner.getSelectedItem().toString();

}

    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal"
    android:padding="8dp" >
            android:id="@+id/spin_province"
        android:layout_width="80dp"
        android:layout_height="wrap_content" />
 
            android:id="@+id/spin_city"
        android:layout_width="112dp"
        android:layout_height="wrap_content" />
 
            android:id="@+id/spin_county"
        android:layout_width="100dp"
        android:layout_height="wrap_content" />