标签：
（1）首先在res文件夹下面的values中创建一个省市arrays.xml文件夹，如下
<?xml version="1.0" encoding="utf-8"?> <resources> <string-array name="province"> <item>-省份-</item> <item>河北省</item> <item>山西省</item> <item>北京市</item> </string-array> <string-array name="hb"> <item>-城市-</item> <item>承德市</item> <item>邯郸市</item> <item>廊坊市</item> </string-array> <string-array name="bj"> <item>-城市-</item> <item>海淀区</item> <item>朝阳区</item> <item>崇文区</item> </string-array> <string-array name="shx"> <item>-城市-</item> <item>大同市</item> <item>临汾市</item> </string-array> </resources>
(2)然后再布局文件中添加两个spinner控件，xml布局代码如下
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/LinearLayout1" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" android:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" tools:context="com.example.spinner.MainActivity" > <Spinner android:id="@+id/spPro" android:layout_width="match_parent" android:layout_height="wrap_content" /> <Spinner android:id="@+id/spcity" android:layout_width="match_parent" android:layout_height="wrap_content" /> </LinearLayout>
（3）到这里资源和布局界面已经搭好，接下来就是在MainActivity中用代码来控制省市的联动，详解在代码的注释中，代码如下
public class MainActivity extends Activity {
private Spinner spPro, spCity;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
spPro = (Spinner) findViewById(R.id.spPro);
spCity = (Spinner) findViewById(R.id.spcity);
// 设置数据源
ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(this, R.array.province,
android.R.layout.simple_spinner_item);
// 设置下拉列表的风格
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
// 绑定数据源到spinner控件上
spPro.setAdapter(adapter);
//spinner选项选择事件
spPro.setOnItemSelectedListener(new OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
//此处的parent是指的spPro的下拉框
Spinner spinner = (Spinner) parent;
//通过getItemAtPosition(position)的方法来找到省项的名称
String pro = (String) spinner.getItemAtPosition(position);
//设置市级的数据适配器
ArrayAdapter<CharSequence> cityAdapter = ArrayAdapter.createFromResource(MainActivity.this, R.array.bj,
android.R.layout.simple_spinner_item);
//判断，然后设置适配器
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);
}
spCity.setAdapter(cityAdapter);
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
}
});
}
}
最后运行的效果就是如下图所示
Android——spinner控件实现读取xml资源，省、市两级互动
标签：
原文地址：http://www.cnblogs.com/deng-c-q/p/5208595.html
