通过Spinner视图实现二级联动功能(省市)

1.确定我需要的数据放到res/values/arrays.xml文件(定义数组)

-省份-
河北省
山西省 
北京市 


-城市-
承德市
邯郸市 
廊坊市 


-城市-
海淀区
朝阳区 
崇文区 


-城市-
大同市
临汾市

2.编写xml界面res/values/main.xml文件(编写界面)

android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="@+id/textView"
/>
android:layout_width="fill_parent"
android:layout_height="wrap_content"
> 
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/province"
/>
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toRightOf="@id/province"
android:id="@+id/city"
/>

3.在Activity中实现省市联动功能

/**
* 通过Spinner实现省市(两级)联动
* @author 黑色天空
*/
public class MainActivity extends Activity {
private TextView textView ;
private Spinner province;
private Spinner city;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);

//String[] provinces = new String[]{"-省份-","河北省","山西省","北京"};
textView = (TextView)this.findViewById(R.id.textView);
province = (Spinner)this.findViewById(R.id.province);
city = (Spinner)this.findViewById(R.id.city);

//(处理省的显示)
//将可选内容与ArrayAdapter的连接(从资源数组文件中获取数据)
ArrayAdapter adapter =
ArrayAdapter.createFromResource(this, R.array.province, android.R.layout.simple_spinner_item);
//new ArrayAdapter(this,android.R.layout.simple_spinner_item, provinces);
//设置下拉列表的风格
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);

//将数据绑定到Spinner视图上
province.setAdapter(adapter);

//添加条目被选中监听器
province.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {

@Override
public void onItemSelected(AdapterView parent, View view,int position, long id) {
//parent既是province对象
Spinner spinner = (Spinner)parent;
String pro = (String)spinner.getItemAtPosition(position);

//(处理省的市的显示)
//将默认值与ArrayAdapter连接(从资源数组文件中获取数据)
ArrayAdapter cityAdapter = ArrayAdapter.createFromResource
(MainActivity.this, R.array.citydefault, android.R.layout.simple_spinner_item);
//new ArrayAdapter
// (MainActivity.this,android.R.layout.simple_spinner_item, cities);
//获取所在省含有哪些市(从资源数组文件中获取数据)
if(pro.equals("河北省")){

cityAdapter = ArrayAdapter.createFromResource
(MainActivity.this, R.array.hb, android.R.layout.simple_spinner_item);
}else if(pro.equals("北京市")){

cityAdapter = ArrayAdapter.createFromResource
(MainActivity.this, R.array.bj, android.R.layout.simple_spinner_item);
}else if(pro.equals("山西省")){

cityAdapter = ArrayAdapter.createFromResource
(MainActivity.this, R.array.shx, android.R.layout.simple_spinner_item);
}
//绑定数据到Spinner(City)上
city.setAdapter(cityAdapter);
}

@Override
public void onNothingSelected(AdapterView parent) {

}

});
}
}