如何使用Spinner实现省市的二级联动功能

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) {

}

});

}

}

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